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Rozprawy doktorskie na temat „Human brain- Neuroimaging”

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Data publikacji: 6 września 2023

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Sprawdź 20 najlepszych rozpraw doktorskich naukowych na temat „Human brain- Neuroimaging”.

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1

Burgess, Richard Ely. "Magnetic resonance imaging at ultra high field implications for human neuroimaging /." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1089949841.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xiv, 222 p. : ill. (some col.). Advisor: Pierre-Marie Luc Robitaille, Dept. of Emergency Medicine. Includes bibliographical references.
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Krienen, Fenna Marie. "Large-Scale Networks in the Human Brain revealed by Functional Connectivity MRI." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11081.

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The human brain is composed of distributed networks that connect a disproportionately large neocortex to the brainstem, cerebellum and other subcortical structures. New methods for analyzing non-invasive imaging data have begun to reveal new insights into human brain organization. These methods permit characterization of functional interactions within and across brain networks, and allow us to appreciate points of departure between the human brain and non-human primates.<br>Psychology
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Meyniel, Florent. "How the human brain allocates physical effort over time : evidence from behavior, neuroimaging and pharmacology." Paris 6, 2013. http://www.theses.fr/2013PA066366.

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Faire le bon choix, c’est trouver le bon compromis entre coût et bénéfice. Dans le cas de la gestion de l’effort physique, ce compromis prend une dimension temporelle. Pour comprendre comment la décision d’arrêter ou reprendre l’effort est prise, nous avons développé un paradigme expérimental chez le sujet humain sain et un modèle computationnel dans lequel le coût estimé augmente à l’effort car la fatigue affecte toute la commande motrice et diminue au repos quand nous récupérons. Le comportement reflète les variations de ce coût estimé et du compromis avec le bénéfice attendu. Grâce à la com
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Manickam, Sameer. "Clustering-based approach for the localization of Human Brain Nuclei." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284443.

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The study of brain nuclei in neuroimaging poses challenges owing to its small size. Many neuroimaging studies have been reported for effectively locating these nuclei and characterizing their functional connectivity with other regions of the brain. Hypothalamus, Locus Coeruleus, and Ventral Tegmental area are such nuclei found in the human brain, which are challenging to visualize owing to their size and lack of tissue contrast with surrounding regions. Resting-state functional magnetic resonance imaging (rsfMRI) analysis on these nuclei enabled researchers to characterize their connectivity w
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Roeder, Luisa. "Cortical control of human gait." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/101537/1/Luisa_Roeder_Thesis.pdf.

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This research has advanced our understanding of how the brain controls muscle activity during walking, in healthy adults of different ages and people with Parkinson's disease. It has shown that there is direct brain control of leg muscles during the double support phase of gait in these populations. Moreover, this brain control is reduced in people with Parkinson's compared to healthy individuals, and standard anti-Parkinsonian medication does not counteract this deficiency.
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Córdova, Palomera Aldo. "Early Neurodevelopment, adult human cognition and depressive psychopathology: analysis of neuroimaging brain correlates and epigenetic mediators." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/328712.

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In the behavioral sciences, the concept of phenotypic plasticity can be roughly categorized into two classes: developmental and activational plasticity. Developmental plasticity denotes the capacity of an individual carrying a specific genetic background to adopt different developmental trajectories under distinct settings. Complementarily, activational plasticity refers to the differential activation of adaptation mechanisms: an individual with high activational plasticity would be able to detect a wide range of environments, and to respond to it using a psychobiological phenotype from a rela
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Kirk, Ulrich. "The modularity of aesthetic processing and perception in the human brain : functional neuroimaging studies of neuroaesthetics." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1445135/.

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By taking advantage of the advent of functional Magnetic Resonance Imaging (fMRI) this thesis argues that aesthetics belongs in the domain of neurobiology by investigating the different brain processes that are implicated in aesthetic perception from two perspectives. The first experiment explores a specific artistic style that has stressed the problem in the relationship between objects and context. This study investigates the neural responses associated with changes in visual perception, as when objects are placed in their normal context versus when the object-context relationship is violate
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Putt, Shelby Stackhouse. "Human brain activity during stone tool production : tracing the evolution of cognition and language." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/2133.

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This study aims to shed light on how and when mechanisms of the human brain evolved to support complex cognition and language. The field of evolutionary cognitive archaeology asserts that prehistoric technologies, as products of past cognition in action, are informative of the minimum cognitive and linguistic abilities that hominins needed to possess for their production. Previous researchers attempted to reconstruct the neural correlates of two Early Stone Age (ESA) tool industries, the 2.6 million-year-old Oldowan indust
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Cousijn, Helena. "Expression and neural correlates of schizophrenia risk gene ZNF804A." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:91c9b37f-5b7b-4400-b129-0c33e23ee6ed.

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Genome wide association studies have provided evidence for a significant association between ZNF804A (zinc finger protein 804A) - specifically the intronic single nucleotide polymorphism (SNP) rs1344706 - and schizophrenia, but little is known about the function of the gene or the effects of the SNP. By studying post-mortem human brain tissue, I characterised ZNF804A immunoreactivity in adult and foetal human brain and investigated effects of diagnosis and rs1344706 genotype on ZNF804A mRNA and protein expression. Secondly, I looked in a large sample of healthy volunteers (n=922) at the effect
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Uhrig, Lynn. "A study of the brain mechanisms of loss of consciousness during general anesthesia using non-human primate neuroimaging." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066339.

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Comment les agents anesthésiques induisent-ils une perte de conscience lors de l’anesthésie générale? La dissection des mécanismes neuronaux de l’anesthésie générale représente un défi important en neurosciences. L’émergence de l’IRM fonctionnelle (IRMf) chez le primate non-humain donne l’occasion d’étudier l’activité neuronale à l’état éveillé et sous anesthésie en s’affranchissant des contraintes cliniques. Le développement récent de paradigmes auditifs, tel que le paradigme ‘local-global’, qui explore spécifiquement les réseaux cérébraux impliqués dans l’état conscient, nous a permis d’émet
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Johnen, Vanessa Mareike. "Non-invasive associative plasticity induction in a cortico-cortical pathway of the human brain." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:b1cd8707-9801-46aa-80f1-5d7231e59f1f.

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Associative plasticity, which involves modification of synaptic strength by coactivation of two synaptic inputs, has been demonstrated in many species. Here I explore whether it is possible to induce associative plasticity within a corticocortical pathway in the human brain using a novel protocol that activates two brain areas repeatedly with double-site transcranial magnetic stimulation (TMS). The pathway between ventral premotor cortex (PMv) and primary motor cortex (M1) which computes hand movements for precision grasp was manipulated. First, I selectively potentiated physiological connecti
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12

Pissiota, Anna. "Fear, Startle, and Fear-Potentiated Startle : Probing Emotion in the Human Brain." Doctoral thesis, Uppsala University, Department of Psychology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3479.

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<p>The present thesis explored the neurobiological basis of three aspects of defense behaviors in humans. Positron emission tomography methodology was used, and changes in regional cerebral blood flow (rCBF) were measured as an index of neural activity. Firstly, brain function was studied in a group of patients suffering from combat-related posttraumatic stress disorder, using a symptom provocation paradigm with combat sounds in order to elicit fear. Exposure to auditory trauma reminders relative to neutral sounds was associated with increased rCBF in sensorimotor areas, the cerebellar vermis,
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13

Li, Changhong [Verfasser], Björn M. [Akademischer Betreuer] Kampa, Frank [Akademischer Betreuer] Müller, and David [Akademischer Betreuer] Elmenhorst. "Impact of sleep on the A1 adenosine receptor, neuronal activity, and structural connectivity of the human brain : a multi-modal neuroimaging approach / Changhong Li ; Björn M. Kampa, Frank Müller, David Elmenhorst." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1240390882/34.

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14

Marklund, Petter. "Cross-functional brain imaging of attention, memory and executive functions : unity and diversity of neurocognitive component processes /." Doctoral thesis, Umeå : Department of Psychology, Umeå University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-805.

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15

Maingault, Sophie. "Surface-based characterization of healthy human adult cortex : An investigation of its morphological variability, late maturation and asymmetries." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0127/document.

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L’étude de la complexité de l’anatomie du cerveau humain nécessite la caractérisation des paramètres multimodaux et multi-échelle obtenus par des techniques de neuroimagerie récentes. Pour ce travail de thèse nous avons tiré profit d’un logiciel automatique actuel d’analyse surfacique d’images cérébrales afin d’extraire les phénotypes structuraux du cortex cérébral humain, c’est-à-dire l’épaisseur corticale, l’aire de la surface, la profondeur sulcale, la courbure et le contenu en myéline intracorticale. L’objectif principal de ce travail a été de caractériser des variables structurales multim
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Prince, Steven Eric. "Functional Neuroimaging Investigations of Human Memory Comparisons of Successful Encoding and Retrieval for Relational and Item Information." Diss., 2007. http://hdl.handle.net/10161/201.

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Conroy, Susan Kim. "Chemotherapy, estrogen, and cognition : neuroimaging and genetic variation." Thesis, 2014. http://hdl.handle.net/1805/4027.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>The time course and biological mechanisms by which breast cancer (BC) and/or alterations in estrogen status lead to cognitive and brain changes remain unclear. The studies presented here use neuroimaging, cognitive testing, genetics, and biomarkers to investigate how post-chemotherapy interval (PCI), chemotherapy-induced amenorrhea (CIA), and genetic variation in the estrogen pathway affect the brain. Chapter 1 examines the association of post-chemotherapy interval (PCI) with gray matter density (GMD) and working memory-related brain
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Kashuk, Sam. "Investigation of MRI Brain Changes in Developmental Coordination Disorder and Friedreich’s ataxia." Thesis, 2017. https://vuir.vu.edu.au/33211/.

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‘To move things is all mankind can do. ... whether whispering a syllable or felling a forest.’ - Charles Sherrington --- The human motor system is one of the most complicated systems in the human body. This complex system of interactions and collaborations between different regions of the human nervous system enables humans to interact with their external environment. Several parts of the human central nervous system are required to communicate effectively to send signals to the target muscles to carry out the final voluntary or involuntary movements. At the level of the central nervous
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19

Rodrigues, João. "New methodologies for directed functional connectivity applied to brain neuroimaging research." Doctoral thesis, 2015. http://hdl.handle.net/10451/18375.

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Tese de doutoramento, Engenharia Biomédica e Biofísica, Universidade de Lisboa, Faculdade de Ciências, 2015<br>In the last decade directed functional connectivity analysis has been increasingly adopted as a method to study the information transfer in the human brain. However, its use with functional neuroimaging data has faced several limitations and controversies, especially when applied to functional magnetic resonance imaging (fMRI) data. This thesis presents a study of directed functional connectivity metrics and their application to datasets from two of the most widely used functional neu
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20

Zivadinov, R., G. U. Poloni, K. Marr, et al. "Decreased brain venous vasculature visibility on susceptibility-weighted imaging venography in patients with multiple sclerosis is related to chronic cerebrospinal venous insufficiency." 2011. http://hdl.handle.net/10454/6252.

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BACKGROUND: The potential pathogenesis between the presence and severity of chronic cerebrospinal venous insufficiency (CCSVI) and its relation to clinical and imaging outcomes in brain parenchyma of multiple sclerosis (MS) patients has not yet been elucidated. The aim of the study was to investigate the relationship between CCSVI, and altered brain parenchyma venous vasculature visibility (VVV) on susceptibility-weighted imaging (SWI) in patients with MS and in sex- and age-matched healthy controls (HC). METHODS: 59 MS patients, 41 relapsing-remitting and 18 secondary-progressive, and 33 HC w
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