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Journal articles on the topic 'SSCEP'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Vulliamy, Graham, and James Carrier. "Sorcery and SSCEP: the cultural context of an educational innovation." British Journal of Sociology of Education 6, no. 1 (1985): 17–33. http://dx.doi.org/10.1080/0142569850060102.

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2

Weeks, Sheldon. "Education for village life? What has happened to grade ten leavers from the five SSCEP high schools?" International Journal of Educational Development 7, no. 1 (1987): 33–48. http://dx.doi.org/10.1016/0738-0593(87)90005-8.

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3

Punsawad, Yunyong, and Yodchanan Wongsawat. "Multi-command SSAEP-based BCI system with training sessions for SSVEP during an eye fatigue state." IEEJ Transactions on Electrical and Electronic Engineering 12 (June 2017): S72—S78. http://dx.doi.org/10.1002/tee.22441.

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4

Teng, Fei, Yixin Chen, Aik Min Choong, et al. "Square or Sine: Finding a Waveform with High Success Rate of Eliciting SSVEP." Computational Intelligence and Neuroscience 2011 (2011): 1–5. http://dx.doi.org/10.1155/2011/364385.

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Steady state visual evoked potential (SSVEP) is the brain's natural electrical potential response for visual stimuli at specific frequencies. Using a visual stimulus flashing at some given frequency will entrain the SSVEP at the same frequency, thereby allowing determination of the subject's visual focus. The faster an SSVEP is identified, the higher information transmission rate the system achieves. Thus, an effective stimulus, defined as one with high success rate of eliciting SSVEP and high signal-noise ratio, is desired. Also, researchers observed that harmonic frequencies often appear in

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5

Wang, Xiaoqing. "Stochastic Separated Continuous Conic Programming: Strong Duality and a Solution Method." Mathematical Problems in Engineering 2014 (2014): 1–20. http://dx.doi.org/10.1155/2014/896591.

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We study a new class of optimization problems calledstochastic separated continuous conic programming(SSCCP). SSCCP is an extension to the optimization model calledseparated continuous conic programming(SCCP) which has applications in robust optimization and sign-constrained linear-quadratic control. Based on the relationship among SSCCP, its dual, and their discretization counterparts, we develop a strong duality theory for the SSCCP. We also suggest a polynomial-time approximation algorithm that solves the SSCCP to any predefined accuracy.

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Chang, Min Hye, Jeong Su Lee, Jeong Heo, and Kwang Suk Park. "Eliciting dual-frequency SSVEP using a hybrid SSVEP-P300 BCI." Journal of Neuroscience Methods 258 (January 2016): 104–13. http://dx.doi.org/10.1016/j.jneumeth.2015.11.001.

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7

Marchetti, Antonio, Fiamma Buttitta, Vittoria Carnicelli, et al. "Enriched SSCP." Diagnostic Molecular Pathology 6, no. 4 (1997): 185–91. http://dx.doi.org/10.1097/00019606-199708000-00002.

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8

Wang, Lu, Dan Han, Binbin Qian, Zhenhao Zhang, Zhijun Zhang, and Zhifang Liu. "The Validity of Steady-State Visual Evoked Potentials as Attention Tags and Input Signals: A Critical Perspective of Frequency Allocation and Number of Stimuli." Brain Sciences 10, no. 9 (2020): 616. http://dx.doi.org/10.3390/brainsci10090616.

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Steady-state visual evoked potential (SSVEP) is a periodic response to a repetitive visual stimulus at a specific frequency. Currently, SSVEP is widely treated as an attention tag in cognitive activities and is used as an input signal for brain–computer interfaces (BCIs). However, whether SSVEP can be used as a reliable indicator has been a controversial issue. We focused on the independence of SSVEP from frequency allocation and number of stimuli. First, a cue–target paradigm was adopted to examine the interaction between SSVEPs evoked by two stimuli with different frequency allocations under

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9

Zhu, Fangkun, Lu Jiang, Guoya Dong, Xiaorong Gao, and Yijun Wang. "An Open Dataset for Wearable SSVEP-Based Brain-Computer Interfaces." Sensors 21, no. 4 (2021): 1256. http://dx.doi.org/10.3390/s21041256.

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Brain-computer interfaces (BCIs) provide humans a new communication channel by encoding and decoding brain activities. Steady-state visual evoked potential (SSVEP)-based BCI stands out among many BCI paradigms because of its non-invasiveness, little user training, and high information transfer rate (ITR). However, the use of conductive gel and bulky hardware in the traditional Electroencephalogram (EEG) method hinder the application of SSVEP-based BCIs. Besides, continuous visual stimulation in long time use will lead to visual fatigue and pose a new challenge to the practical application. Thi

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10

Chen, Yeou-Jiunn, Pei-Chung Chen, Shih-Chung Chen, and Chung-Min Wu. "Denoising Autoencoder-Based Feature Extraction to Robust SSVEP-Based BCIs." Sensors 21, no. 15 (2021): 5019. http://dx.doi.org/10.3390/s21155019.

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For subjects with amyotrophic lateral sclerosis (ALS), the verbal and nonverbal communication is greatly impaired. Steady state visually evoked potential (SSVEP)-based brain computer interfaces (BCIs) is one of successful alternative augmentative communications to help subjects with ALS communicate with others or devices. For practical applications, the performance of SSVEP-based BCIs is severely reduced by the effects of noises. Therefore, developing robust SSVEP-based BCIs is very important to help subjects communicate with others or devices. In this study, a noise suppression-based feature

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11

Pillai, Jain Bhaskara, Yonni Pellet, Georgia Panagopoulos, et al. "Somatosensory-Evoked Potential–Guided Intercostal Artery Reimplantation in Thoracoabdominal Aortic Aneurysm Surgery." Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery 8, no. 4 (2013): 302–6. http://dx.doi.org/10.1097/imi.0000000000000005.

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Objective This study was undertaken to evaluate the use of somatosensory-evokedpotential (SSEP) monitoring on intercostal artery reimplantation (IAR) and spinal cord ischemia rates during thoracoabdominal ortic aneurysm repair. Methods Fifty-two patients had thoracoabdominal aortic aneurysm repair with IAR under SSEP guidance and 79 patients had repair with routine IAR without SSEP guidance from 1999 to 2010. Results No differences were observed between the two groups in age (63.1 ± 11.6 vs 64.8 ± 9.8 years), sex (57.7% vs 50.6% men), chronic dissections (40.4% vs 44.3%), renal insufficiency (

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12

Zhang, Feng, Chengcheng Han, Lili Li, Xin Zhang, Jun Xie, and Yeping Li. "Research on High-Frequency Combination Coding-Based SSVEP-BCIs and Its Signal Processing Algorithms." Shock and Vibration 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/194230.

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This study presents a new steady-state visual evoked potential (SSVEP) paradigm for brain computer interface (BCI) systems. The new paradigm is High-Frequency Combination Coding-Based SSVEP (HFCC-SSVEP). The goal of this study is to increase the number of targets using fewer stimulation frequencies, with diminishing subject’s fatigue and reducing the risk of photosensitive epileptic seizures. This paper investigated the HFCC-SSVEP high-frequency response (beyond 25 Hz) for 3 frequencies (25 Hz, 33.33 Hz, and 40 Hz). HFCC-SSVEP producesnnwithnhigh stimulation frequencies through Time Series Com

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13

Li, Minglun, Dianning He, Chen Li, and Shouliang Qi. "Brain–Computer Interface Speller Based on Steady-State Visual Evoked Potential: A Review Focusing on the Stimulus Paradigm and Performance." Brain Sciences 11, no. 4 (2021): 450. http://dx.doi.org/10.3390/brainsci11040450.

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The steady-state visual evoked potential (SSVEP), measured by the electroencephalograph (EEG), has high rates of information transfer and signal-to-noise ratio, and has been used to construct brain–computer interface (BCI) spellers. In BCI spellers, the targets of alphanumeric characters are assigned different visual stimuli and the fixation of each target generates a unique SSVEP. Matching the SSVEP to the stimulus allows users to select target letters and numbers. Many BCI spellers that harness the SSVEP have been proposed over the past two decades. Various paradigms of visual stimuli, inclu

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14

Lee, Hyeon Kyu, and Young-Seok Choi. "Enhancing SSVEP-Based Brain-Computer Interface with Two-Step Task-Related Component Analysis." Sensors 21, no. 4 (2021): 1315. http://dx.doi.org/10.3390/s21041315.

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Among various methods for frequency recognition of the steady-state visual evoked potential (SSVEP)-based brain-computer interface (BCI) study, a task-related component analysis (TRCA), which extracts discriminative spatial filters for classifying electroencephalogram (EEG) signals, has gathered much interest. The TRCA-based SSVEP method yields lower computational cost and higher classification performance compared to existing SSVEP methods. In spite of its utility, the TRCA-based SSVEP method still suffers from the degradation of the frequency recognition rate in cases where EEG signals with

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15

Phillips, Jessica L. H., Nohra Chalouhi, Pascal Jabbour, et al. "Somatosensory Evoked Potential Changes in Neuroendovascular Procedures." Neurosurgery 75, no. 5 (2014): 560–67. http://dx.doi.org/10.1227/neu.0000000000000510.

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Abstract BACKGROUND: Neurophysiological monitoring is routinely used during neurosurgical procedures. Use of neurophysiological monitoring has extended to neuroendovascular procedures, but evidence of its impact on clinical outcome in this arena is limited. OBJECTIVE: To report the incidence of significant intraoperative somatosensory evoked potential (SSEP) changes during neuroendovascular surgery and to correlate SSEP changes with clinical outcomes. METHODS: Patients who underwent neuroendovascular surgery at our institution between 2011 and 2013 were included in the analysis. Medical charts

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16

Zhu, Danhua, Jordi Bieger, Gary Garcia Molina, and Ronald M. Aarts. "A Survey of Stimulation Methods Used in SSVEP-Based BCIs." Computational Intelligence and Neuroscience 2010 (2010): 1–12. http://dx.doi.org/10.1155/2010/702357.

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Brain-computer interface (BCI) systems based on the steady-state visual evoked potential (SSVEP) provide higher information throughput and require shorter training than BCI systems using other brain signals. To elicit an SSVEP, a repetitive visual stimulus (RVS) has to be presented to the user. The RVS can be rendered on a computer screen by alternating graphical patterns, or with external light sources able to emit modulated light. The properties of an RVS (e.g., frequency, color) depend on the rendering device and influence the SSVEP characteristics. This affects the BCI information throughp

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17

Touyama, Hideaki, and Mitsuru Sakuda. "Online Control of a Virtual Object with Collaborative SSVEP." Journal of Advanced Computational Intelligence and Intelligent Informatics 21, no. 7 (2017): 1291–97. http://dx.doi.org/10.20965/jaciii.2017.p1291.

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In this paper, we propose a brain-computer interface (BCI) based on collaborative steady-state visually evoked potential (SSVEP). A technique for estimating the common direction of the gaze of multiple subjects is studied with a view to controlling a virtual object in a virtual environment. The electro-encephalograms (EEG) of eight volunteers are simultaneously recorded with two virtual cubes as visual stimuli. These two virtual cubes flicker at different rates, 6 Hz and 8 Hz, and the corresponding SSVEP is observed around the occipital area. The amplitude spectra of the EEG activity of indivi

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18

Xie, Songyun, Chang Liu, Klaus Obermayer, et al. "Stimulator Selection in SSVEP-Based Spatial Selective Attention Study." Computational Intelligence and Neuroscience 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/6410718.

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Steady-State Visual Evoked Potentials (SSVEPs) are widely used in spatial selective attention. In this process the two kinds of visual simulators, Light Emitting Diode (LED) and Liquid Crystal Display (LCD), are commonly used to evoke SSVEP. In this paper, the differences of SSVEP caused by these two stimulators in the study of spatial selective attention were investigated. Results indicated that LED could stimulate strong SSVEP component on occipital lobe, and the frequency of evoked SSVEP had high precision and wide range as compared to LCD. Moreover a significant difference between noticed

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19

Mouli, Surej, Ramaswamy Palaniappan, Emmanuel Molefi, and Ian McLoughlin. "In-Ear Electrode EEG for Practical SSVEP BCI." Technologies 8, no. 4 (2020): 63. http://dx.doi.org/10.3390/technologies8040063.

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Steady State Visual Evoked Potential (SSVEP) methods for brain–computer interfaces (BCI) are popular due to higher information transfer rate and easier setup with minimal training, compared to alternative methods. With precisely generated visual stimulus frequency, it is possible to translate brain signals into external actions or signals. Traditionally, SSVEP data is collected from the occipital region using electrodes with or without gel, normally mounted on a head cap. In this experimental study, we develop an in-ear electrode to collect SSVEP data for four different flicker frequencies and

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20

Yue, Qing, Tyson Hale, and Aaron Knecht. "A Comparison of Interside Asymmetries of Lower Extremity Somatosensory Evoked Potentials in Anesthetized Patients with Unilateral Lumbosacral Radiculopathy." Asian Spine Journal 11, no. 1 (2017): 99–104. http://dx.doi.org/10.4184/asj.2017.11.1.99.

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<sec><title>Study Design</title><p>Prospective cohort study.</p></sec><sec><title>Purpose</title><p>This study was to investigate interside asymmetries of three lower extremity somatosensory evoked potentials (SSEPs) in anesthetized patients with unilateral lumbosacral radiculopathy.</p></sec><sec><title>Overview of Literature</title><p>Although interside asymmetry is an established criterion of abnormal SSEP, little is known which of the lower SSEPs is more sensitive in detecting interside asymmetr

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Brinkmann, Nicole, Rainer Martens, and Christoph C. Tebbe. "Origin and Diversity of Metabolically Active Gut Bacteria from Laboratory-Bred Larvae of Manduca sexta (Sphingidae, Lepidoptera, Insecta)." Applied and Environmental Microbiology 74, no. 23 (2008): 7189–96. http://dx.doi.org/10.1128/aem.01464-08.

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ABSTRACT Cultivation-independent analyses based on genetic profiling of partial bacterial 16S rRNA genes by PCR-single-strand conformation polymorphism (PCR-SSCP), reverse transcriptase (RT)-PCR-SSCP of the 16S rRNA itself, and stable isotope probing (SIP), followed by RT-PCR-SSCP, were applied to characterize the diversity of metabolically active bacteria in the larval gut of Manduca sexta bred on tobacco leaves under greenhouse conditions. For SIP, hatching larvae were fed with leaves from tobacco plants grown in a 13CO2-enriched atmosphere. Dominant SSCP bands were sequenced and phylogeneti

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22

Farrow, Maree, Richard B. Silberstein, Florence Levy, et al. "Prefrontal and Parietal Deficits in ADHD Suggested by Brain Electrical Activity Mapping During Children's Performance of the AX CPT." Australian Educational and Developmental Psychologist 13, no. 1 (1996): 59–68. http://dx.doi.org/10.1017/s0816512200027413.

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AbstractNine children meeting DSM-III-R criteria for Attention Deficit Hyperactivity Disorder (ADHD) and eighteen normal children participated in this study. A screening assessment revealed significantly more behavioural and academic problems in the ADHD group. Subjects performed a low demand visual vigilance task (the reference task) and the AX version of the continuous perfonnance task (CPT), while the steady-state visually evoked potential (SSVEP) was continuously recorded from 64 scalp electrode sites. The topography of the SSVEP amplitude difference between the reference and AX tasks was

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23

Fung, N. Y., Y. Hu, M. G. Irwin, B. F. M. Chow, and M. Y. Yuen. "Comparison between Sevoflurane/Remifentanil and Propofol/Remifentanil Anaesthesia in Providing Conditions for Somatosensory Evoked Potential Monitoring during Scoliosis Corrective Surgery." Anaesthesia and Intensive Care 36, no. 6 (2008): 779–85. http://dx.doi.org/10.1177/0310057x0803600605.

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Somatosensory evoked potential (SSEP) monitoring is an important tool in spinal corrective surgery. Anaesthesia has a significant influence on SSEP monitoring and a technique which has the least and shortest suppressant effect on SSEP while facilitating a fast recovery from anaesthesia is ideal. We compared the effect of sevoflurane/remifentanil and propofol/remifentanil anaesthesia on SSEPs during scoliosis corrective surgery and assessed patients’ clinical recovery profiles. Twenty patients with idiopathic scoliosis receiving surgical correction with intraoperative SSEP monitoring were prosp

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Ares, William J., Ramesh M. Grandhi, David M. Panczykowski, et al. "Diagnostic Accuracy of Somatosensory Evoked Potential Monitoring in Evaluating Neurological Complications During Endovascular Aneurysm Treatment." Operative Neurosurgery 14, no. 2 (2017): 151–57. http://dx.doi.org/10.1093/ons/opx104.

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Abstract BACKGROUND Somatosensory evoked potential (SSEP) monitoring is used extensively for early detection and prevention of neurological complications in patients undergoing many different neurosurgical procedures. However, the predictive ability of SSEP monitoring during endovascular treatment of cerebral aneurysms is not well detailed. OBJECTIVE To evaluate the performance of intraoperative SSEP in the prediction postprocedural neurological deficits (PPNDs) after coil embolization of intracranial aneurysms. METHODS This population-based cohort study included patients ≥18 years of age unde

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WAGNER, MARTIN, ANGELIKA LEHNER, DIETER KLEIN, and ANDREAS BUBERT. "Single-Strand Conformation Polymorphisms in the hly Gene and Polymerase Chain Reaction Analysis of a Repeat Region in the iap Gene to Identify and Type Listeria monocytogenes." Journal of Food Protection 63, no. 3 (2000): 332–36. http://dx.doi.org/10.4315/0362-028x-63.3.332.

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Two novel methods that allow the powerful identification of Listeria monocytogenes by polymerase chain reaction (PCR) and simultaneous differentiation by special electrophoresis formats are described. The first method involves a PCR-driven single-strand conformation polymorphism (SSCP-PCR) assay using a portion of the noncoding region of the hly gene. The assay was evaluated with 120 genetically distinct L. monocytogenes strains of either foodborne or clinical origin. Distribution of listerial strains to at least 14 SSCP types was observed. In respect to the panel of strains, 39.7% were assign

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Peng, Zai-Yun, Jing-Jing Wang, Xian-Jun Long, and Fu-Ping Liu. "Painlevé–Kuratowski Convergence of Solutions for Perturbed Symmetric Set-Valued Quasi-Equilibrium Problem via Improvement Sets." Asia-Pacific Journal of Operational Research 37, no. 04 (2020): 2040003. http://dx.doi.org/10.1142/s0217595920400035.

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This paper is devoted to study the Painlevé–Kuratowski convergence of solution sets for perturbed symmetric set-valued quasi-equilibrium problems (SSQEP)[Formula: see text] via improvement sets. By virtue of the oriented distance function, the sufficient conditions of Painlevé–Kuratowski convergence of efficient solution sets for (SSQEP)[Formula: see text] are obtained through a new nonlinear scalarization technical. Then, under [Formula: see text]-convergence of set-valued mappings, the Painlevé–Kuratowski convergence of weak efficient solution sets for (SSQEP)[Formula: see text] is discussed

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Cao, Fei, Huashan Li, Yang Zhang, and Liang Zhao. "Numerical Simulation and Comparison of Conventional and Sloped Solar Chimney Power Plants: The Case for Lanzhou." Scientific World Journal 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/852864.

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The solar chimney power plant (SCPP) generates updraft wind through the green house effect. In this paper, the performances of two SCPP styles, that is, the conventional solar chimney power plant (CSCPP) and the sloped solar chimney power plant (SSCPP), are compared through a numerical simulation. A simplified Computational Fluid Dynamics (CFD) model is built to predict the performances of the SCPP. The model is validated through a comparison with the reported results from the Manzanares prototype. The annual performances of the CSCPP and the SSCPP are compared by taking Lanzhou as a case stud

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28

Ikeda, Akira, and Yoshikazu Washizawa. "Steady-State Visual Evoked Potential Classification Using Complex Valued Convolutional Neural Networks." Sensors 21, no. 16 (2021): 5309. http://dx.doi.org/10.3390/s21165309.

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The steady-state visual evoked potential (SSVEP), which is a kind of event-related potential in electroencephalograms (EEGs), has been applied to brain–computer interfaces (BCIs). SSVEP-based BCIs currently perform the best in terms of information transfer rate (ITR) among various BCI implementation methods. Canonical component analysis (CCA) or spectrum estimation, such as the Fourier transform, and their extensions have been used to extract features of SSVEPs. However, these signal extraction methods have a limitation in the available stimulation frequency; thus, the number of commands is li

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29

Silberstein, R. B., A. Pipingas, J. Song, D. A. Camfield, P. J. Nathan, and C. Stough. "Examining Brain-Cognition Effects of Ginkgo Biloba Extract: Brain Activation in the Left Temporal and Left Prefrontal Cortex in an Object Working Memory Task." Evidence-Based Complementary and Alternative Medicine 2011 (2011): 1–10. http://dx.doi.org/10.1155/2011/164139.

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Ginkgo Biloba extract (GBE) is increasingly used to alleviate symptoms of age related cognitive impairment, with preclinical evidence pointing to a pro-cholinergic effect. While a number of behavioral studies have reported improvements to working memory (WM) associated with GBE, electrophysiological studies of GBE have typically been limited to recordings during a resting state. The current study investigated the chronic effects of GBE on steady state visually evoked potential (SSVEP) topography in nineteen healthy middle-aged (50-61 year old) male participants whilst completing an object WM t

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30

Bian, Li Hong, and Ya Jun Lang. "Application of PCR-SSCP Technology in Microorganism Detection." Advanced Materials Research 1044-1045 (October 2014): 716–19. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.716.

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PCR-SSCP is a technology based on the combination of PCR and SSCP, widely used in such research fields as microorganism identification and microorganism flora. In this paper, the application of PCR-SSCP in bacterial detection and microbial community monitoring is briefly introduced.

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Xie, Jiahua, Todd C. Wehner, and Mark A. Conkling. "PCR-based Single-strand Conformation Polymorphism (SSCP) Analysis to Clone Nine Aquaporin Genes in Cucumber." Journal of the American Society for Horticultural Science 127, no. 6 (2002): 925–30. http://dx.doi.org/10.21273/jashs.127.6.925.

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Combining the use of PCR and single-strand conformation polymorphisms (SSCP), nine sequences from the cucumber genome were successfully identified and cloned that encoded two well-conserved asparagine-proline-alanine (NPA) domain homologues to aquaporin genes. The sensitivity and detection efficiency of SSCP and restriction enzyme analysis for detecting DNA sequence variation were evaluated using similar-sized DNA fragments. The SSCP analysis was more sensitive and efficient for discriminating different clones than restriction enzyme analysis, although some sequence variation inside similar-si

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Kashiwase, Yoshiyuki, Kazumichi Matsumiya, Ichiro Kuriki, and Satoshi Shioiri. "Time Courses of Attentional Modulation in Neural Amplification and Synchronization Measured with Steady-state Visual-evoked Potentials." Journal of Cognitive Neuroscience 24, no. 8 (2012): 1779–93. http://dx.doi.org/10.1162/jocn_a_00212.

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Endogenous attention modulates the amplitude and phase coherence of steady-state visual-evoked potentials (SSVEPs). In efforts to decipher the neural mechanisms of attentional modulation, we compared the time course of attentional modulation of SSVEP amplitude (thought to reflect the magnitude of neural population activity) and phase coherence (thought to reflect neural response synchronization). We presented two stimuli flickering at different frequencies in the left and right visual hemifields and asked observers to shift their attention to either stimulus. Our results demonstrated that atte

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HARA, Tomoyoshi, Jun MIURA, Shuji OISHI, Takahiro SHINKAI, Tetsuto MINAMI, and Shigeki NAKAUCHI. "Brain robot interface using SSVEP." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2016 (2016): 2P1–12b2. http://dx.doi.org/10.1299/jsmermd.2016.2p1-12b2.

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34

Ma, Liang, and Joseph A. Kovacs. "Rapid Detection of Mutations in the Human-DerivedPneumocystis carinii Dihydropteroate Synthase Gene Associated with Sulfa Resistance." Antimicrobial Agents and Chemotherapy 45, no. 3 (2001): 776–80. http://dx.doi.org/10.1128/aac.45.3.776-780.2001.

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ABSTRACT Recent studies have shown that point mutations in the dihydropteroate synthase (DHPS) gene of human-derivedPneumocystis carinii are related to exposure to sulfa drugs and possibly represent the emergence of sulfa resistance. We developed a simple single-strand conformation polymorphism (SSCP) method to permit rapid detection of these mutations. With plasmid constructs, SSCP was able to detect as little as 10% of a minority population. The SSCP assay was compared to direct sequencing for typing the DHPS gene by examining 37 clinical isolates with known DHPS sequences and 41 clinical is

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Bosworth, Brad T., Evelyn A. Dean-Nystrom, Thomas A. Casey, and Holly L. Neibergs. "Differentiation of F18ab+ from F18ac+Escherichia coli by Single-Strand Conformational Polymorphism Analysis of the Major Fimbrial Subunit Gene (fedA)." Clinical Diagnostic Laboratory Immunology 5, no. 3 (1998): 299–302. http://dx.doi.org/10.1128/cdli.5.3.299-302.1998.

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ABSTRACT Toxin-producing Escherichia coli expressing F18 fimbriae colonizes the small intestines of weaned pigs and causes diarrhea, edema disease, or both. The F18 family is composed of two antigenic variants, F18ab and F18ac. Because many strains do not express F18 fimbriae in vitro, identification and differentiation of these two variants are difficult. Single-strand conformational polymorphism (SSCP) analysis is a rapid method for identifying genetic mutations and polymorphisms. The F18 major fimbrial subunit genes (fedA) of 138 strains were amplified by PCR, and genetic differences were d

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Bahrami, A., S. R. Miraei-Ashtiani, H. Mehrabani-Yeganeh, H. Banani-Rad, and Sh Behzadi. "The association between polymorphism of the GH1 gene and changes in protein structure and carcass traits in Mehraban sheep (Ovis aries)." Animal Production Science 55, no. 5 (2015): 661. http://dx.doi.org/10.1071/an13446.

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The present study indicates an association between carcass traits and genetic polymorphism and changes in the protein structure of the growth hormone 1 (GH1) gene in Mehraban sheep. Polymorphism of the GH1 gene was detected by polymerase chain reaction–single strand conformation polymorphism (PCR–SSCP) and DNA sequencing methods in 463 individuals. Two different structures in the GH1 protein and six single nucleotide polymorphisms were identified. The association of these SSCP patterns and protein structures with carcass traits was analysed. The SSCP patterns were shown to be associated with c

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Walter, Sabrina, Cliodhna Quigley, and Matthias M. Mueller. "Competitive Interactions of Attentional Resources in Early Visual Cortex during Sustained Visuospatial Attention within or between Visual Hemifields: Evidence for the Different-hemifield Advantage." Journal of Cognitive Neuroscience 26, no. 5 (2014): 938–54. http://dx.doi.org/10.1162/jocn_a_00547.

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Performing a task across the left and right visual hemifields results in better performance than in a within-hemifield version of the task, termed the different-hemifield advantage. Although recent studies used transient stimuli that were presented with long ISIs, here we used a continuous objective electrophysiological (EEG) measure of competitive interactions for attentional processing resources in early visual cortex, the steady-state visual evoked potential (SSVEP). We frequency-tagged locations in each visual quadrant and at central fixation by flickering light-emitting diodes (LEDs) at d

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Lamti, Hachem A., Mohamed Moncef Ben Khelifa, and Vincent Hugel. "Cerebral and gaze data fusion for wheelchair navigation enhancement: case of distracted users." Robotica 37, no. 2 (2018): 246–63. http://dx.doi.org/10.1017/s0263574718000991.

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SUMMARYThe goal of this paper is to present a new hybrid system based on the fusion of gaze data and Steady State Visual Evoked Potentials (SSVEP) not only to command a powered wheelchair, but also to account for users distraction levels (concentrated or distracted). For this purpose, a multi-layer perception neural network was set up in order to combine relevant gazing and blinking features from gaze sequence and brainwave features from occipital and parietal brain regions. The motivation behind this work is the shortages raised from the individual use of gaze-based and SSVEP-based wheelchair

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Houlden, D. A., Chen Li, M. L. Schwartz, and Marko Katie. "Median Nerve Somatosensory Evoked Potentials and the Glasgow Coma Scale as Predictors of Outcome in Comatose Patients with Head Injuries." Neurosurgery 27, no. 5 (1990): 701–8. http://dx.doi.org/10.1227/00006123-199011000-00006.

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Abstract Median nerve somatosensory evoked potential (SSEP) grades and Glasgow Coma Scale (GSC) scores were obtained from 51 patients with head injuries within 1 week after the injury to determine the relationship of these scores, both individually and combined, to outcome scores obtained more than 6 months after the injury. SSEP grading was based on the presence or absence of the cortical evoked potential, the amplitude of the early cortically generated P22 wave form, and the conduction time through the brain (P/N13-N20 interpeak latency). SSEP responses from both sides of the brain were comb

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Jahangiri, Faisal R., Nida Qadir, James Blaylock, Leah Cronce-Solano, and Jason Ramsey. "Waveform Window #46: Radial Nerve SSEP (Rn-SSEP): Is It Reliable?" Neurodiagnostic Journal 59, no. 4 (2019): 232–35. http://dx.doi.org/10.1080/21646821.2019.1680085.

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Zhang, Yangsong, Li Dong, Rui Zhang, Dezhong Yao, Yu Zhang, and Peng Xu. "An Efficient Frequency Recognition Method Based on Likelihood Ratio Test for SSVEP-Based BCI." Computational and Mathematical Methods in Medicine 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/908719.

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An efficient frequency recognition method is very important for SSVEP-based BCI systems to improve the information transfer rate (ITR). To address this aspect, for the first time, likelihood ratio test (LRT) was utilized to propose a novel multichannel frequency recognition method for SSVEP data. The essence of this new method is to calculate the association between multichannel EEG signals and the reference signals which were constructed according to the stimulus frequency with LRT. For the simulation and real SSVEP data, the proposed method yielded higher recognition accuracy with shorter ti

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Ko, Li-Wei, Rupesh Kumar Chikara, Yi-Chieh Lee, and Wen-Chieh Lin. "Exploration of User’s Mental State Changes during Performing Brain–Computer Interface." Sensors 20, no. 11 (2020): 3169. http://dx.doi.org/10.3390/s20113169.

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Substantial developments have been established in the past few years for enhancing the performance of brain–computer interface (BCI) based on steady-state visual evoked potential (SSVEP). The past SSVEP-BCI studies utilized different target frequencies with flashing stimuli in many different applications. However, it is not easy to recognize user’s mental state changes when performing the SSVEP-BCI task. What we could observe was the increasing EEG power of the target frequency from the user’s visual area. BCI user’s cognitive state changes, especially in mental focus state or lost-in-thought

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Houlden, David A., Mark I. Boulos, Brian J. Murray, Loretta Norton, and G. Bryan Young. "Giant Somatosensory Evoked Potentials Coincident With Epileptiform Discharges in Acutely Comatose Patients." Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 42, no. 5 (2015): 317–23. http://dx.doi.org/10.1017/cjn.2015.237.

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AbstractBackgroundThe amplitude of the cortically generated somatosensory evoked potential (SSEP) is used to predict outcome in comatose patients. The relationship between epileptiform discharges and SSEP amplitude has not been elucidated in those patients.MethodsBilateral median nerve SSEP and electroencephalograph (EEG) studies were performed in a comatose patient (patient 1) 1 day after cardiac surgery and repeated 4 days later. He had tranexamic acid administered before and during surgery. Another comatose patient (patient 2) had the same studies performed 1 day after sustaining 10 minutes

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Vergeer, Mark, Juraj Mesik, Yihwa Baek, Kelton Wilmerding, and Stephen Engel. "Contrast adaptation reduces SSVEP amplitude." Journal of Vision 17, no. 10 (2017): 485. http://dx.doi.org/10.1167/17.10.485.

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Crawford, Sally. "SSCIP: The First 10 Years." Childhood in the Past 10, no. 1 (2017): 10–15. http://dx.doi.org/10.1080/17585716.2017.1305078.

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Wang, Xin, Ye Han, Enlai Xiao, Kai Zhang, and Yongqiang Ma. "Sulfated Modification of Polysaccharides from Sweet Corncob and Its Antiglycation Activity in Streptozotocin Induced Diabetic Rats." Journal of Biobased Materials and Bioenergy 15, no. 3 (2021): 353–59. http://dx.doi.org/10.1166/jbmb.2021.2068.

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Polysaccharides extracted from sweet corncob (SCP) were modified by sulfuric acid to sulfated sweet corncob (SSCP) with a molecular weight of 13.412 kDa, and their antiglycation activity was studied. SSCP had high inhibitory effects on glycation and showed antiglycation activity stronger than that of SCP in vitro. The maximum inhibition rates of the Amadori products, dicarbonyl compounds, caboxymethyl-lysine (CML), and advanced glycation end products (AGEs) were 76.35, 73.78, 52.79, and 76.36%, respectively. SSCP effectively increased body weight, reduced blood glucose, and increased oral gluc

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Choi, Kang-min, Seonghun Park, and Chang-Hwan Im. "Comparison of Visual Stimuli for Steady-State Visual Evoked Potential-Based Brain-Computer Interfaces in Virtual Reality Environment in terms of Classification Accuracy and Visual Comfort." Computational Intelligence and Neuroscience 2019 (July 1, 2019): 1–7. http://dx.doi.org/10.1155/2019/9680697.

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Recent studies on brain-computer interfaces (BCIs) based on the steady-state visual evoked potential (SSVEP) have demonstrated their use to control objects or generate commands in virtual reality (VR) environments. However, most SSVEP-based BCI studies performed in VR environments have adopted visual stimuli that are typically used in conventional LCD environments without considering the differences in the rendering devices (head-mounted displays (HMDs) used in the VR environments). The proximity between the visual stimuli and the eyes in HMDs can readily cause eyestrain, degrading the overall

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Trigui, Omar, Sawsan Daoud, Mohamed Ghorbel, and Chokri Mhiri. "SSVEP Enhancement Using Moving Average Filter Controlled by Phase Features." Computational Intelligence and Neuroscience 2020 (May 8, 2020): 1–11. http://dx.doi.org/10.1155/2020/7459587.

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Brain-computer interface (BCI) systems translate the human neurophysiological activities into commands through EEG analysis. Improving the BCI performances leads to faster and easier use and less fatigue. In this study, we proposed a new prepossessing approach to increase the robustness of a steady-state visual evoked potential (SSVEP) based BCI. Inspiring from the known properties of the SSVEP frequency components, the goal was to enhance the signal quality by making it more convenient to be interpreted by the decision-making step. We first investigated the potential to detect the deteriorati

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Owen, Caroline M., John Patterson, and Richard B. Silberstein. "Olfactory Modulation of Steady- State Visual Evoked Potential Topography in Comparison with Differences in Odor Sensitivity." Journal of Psychophysiology 16, no. 2 (2002): 71–81. http://dx.doi.org/10.1027//0269-8803.16.2.71.

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Summary Research was undertaken to determine whether olfactory stimulation can alter steady-state visual evoked potential (SSVEP) topography. Odor-air and air-only stimuli were used to determine whether the SSVEP would be altered when odor was present. Comparisons were also made of the topographic activation associated with air and odor stimulation, with the view toward determining whether the revealed topographic activity would differentiate levels of olfactory sensitivity by clearly identifying supra- and subthreshold odor responses. Using a continuous respiration olfactometer (CRO) to preci

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Deutsch, Harel, Marc Arginteanu, Karen Manhart, et al. "Somatosensory evoked potential monitoring in anterior thoracic vertebrectomy." Journal of Neurosurgery: Spine 92, no. 2 (2000): 155–61. http://dx.doi.org/10.3171/spi.2000.92.2.0155.

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Object. Spine surgeons have used intraoperative cortical and subcortical somatosensory evoked potential (SSEP) monitoring to detect changes in spinal cord function when intraoperative procedures can be performed to prevent neurological deterioration. However, the reliability of SSEP monitoring as applied to anterior thoracic vertebral body resections has not been rigorously assessed. Methods. The authors retrospectively reviewed hospital charts and operating room records obtained between August 1993 and December 1998 and found that SSEP monitoring was used in 44 surgical procedures involving a

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