Dissertations / Theses on the topic 'Brain – Ventricles'
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Man, Bik-ling, and 文碧玲. "Plasma brain natriuretic peptide and systemic ventricular function after the Fontan procedure." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45010365.
Full textCheng, Shao Koon Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "The role of brain tissue mechanical properties and cerebrospinal fluid flow in the biomechanics of the normal and hydrocephalic brain." Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 2006. http://handle.unsw.edu.au/1959.4/27292.
Full textLowery, Laura Anne. "Mechanisms of brain ventricle development." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/42949.
Full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references.
The brain ventricles are a conserved system of fluid-filled cavities within the brain that form during the earliest stages of brain development. Abnormal brain ventricle development has been correlated with neurodevelopmental disorders including hydrocephalus and schizophrenia. The mechanisms which regulate formation of the brain ventricles and the embryonic cerebrospinal fluid are poorly understood. Using the zebrafish, I initiated a study of brain ventricle development to define the genes required for this process. The zebrafish neural tube expands into the forebrain, midbrain, and hindbrain ventricles rapidly, over a four-hour window during mid-somitogenesis. In order to determine the genetic mechanisms that affect brain ventricle development, I studied 17 mutants previously-identified as having embryonic brain morphology defects and identified 3 additional brain ventricle mutants in a retroviral-insertion shelf-screen. Characterization of these mutants highlighted several processes involved in brain ventricle development, including cell proliferation, neuroepithelial shape changes (requiring epithelial integrity, cytoskeletal dynamics, and extracellular matrix function), embryonic cerebrospinal fluid secretion, and neuronal development. In particular, I investigated the role of the Na+K+ATPase alpha subunit, Atp1a1, in brain ventricle formation, elucidating novel roles for its function during brain development. This study was facilitated by the snakehead mutant, which has a mutation in the atp1a1 gene and undergoes normal brain ventricle morphogenesis but lacks ventricle inflation. Analysis of the temporal and spatial requirements of atp1a1 revealed an early requirement during formation, but not maintenance, of the neuroepithelium. I also demonstrated a later neuroepithelial requirement for Atp1a1-driven ion pumping that leads to brain ventricle inflation, likely by forming an osmotic gradient that drives fluid flow into the ventricle space.
(cont) Moreover, I have discovered that the forebrain ventricle is particularly sensitive to Na+K+ATPase function, and reducing or increasing Atp1a1 levels leads to a corresponding decrease or increase in ventricle size. Intriguingly, the Na+K+ATPase beta subunit atp1b3a, expressed in the forebrain and midbrain, is specifically required for their inflation, and thus may highlight a distinct regulatory mechanism for the forebrain and midbrain ventricles. In conclusion, my work has begun to define the complex mechanisms governing brain ventricle development, and I suggest that these mechanisms are conserved throughout the vertebrates.
by Laura Anne Lowery.
Ph.D.
Micklewright, Jackie L. "Verbal learning and memory abilities in children with brain tumors the role of the third ventricle region /." unrestricted, 2005. http://etd.gsu.edu/theses/available/etd-11172005-133342/.
Full textTitle from title screen. Tricia Z. King, committee chair; Robin Morris, Mary Morris, committee members. Electronic text (102 p. : col. ill.) : digital, PDF file. Description based on contents viewed July 17, 2007. Includes bibliographical references (p. 91-102).
Al, Omran Alzahra J. "The Effect of Ethanol on Three Types of Ependymal Cilia in The Brain Lateral Ventricle." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1434979511.
Full textWolf, Catherine D. 1980. "Establishing a positional information assay for brain ventricle mutants and investigating the choroid plexuses in zebrafish." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28681.
Full textIncludes bibliographical references (leaves 36-38).
The process by which the neural tube expands into three brain ventricles can be understood through genetic mutant analysis. Within the framework of a characterization of zebrafish mutants with brain ventricle phenotypes, I have developed an assay that looks for evidence of compromised gene expression patterns. I have shown that a cocktail of krox20, pax2a, shh, and zicl antisense RNA probes hybridizes to domains in the developing brain that reflect anterior, posterior, dorsal, and ventral axis specification. In addition, I have investigated the choroid plexus (CP) cells lining the brain ventricles in the zebrafish. Though we were unable to clearly identify the CP in the adult brain, we did identify two homologues in zebrafish of a conserved gene expressed in CP of vertebrates. We found that one of these genes, Drcpllb, was expressed from tailbud into early larva stage. Further, Drcpllb is expressed in neurula stage embryos in the anterior neural plate. Through these studies, we established an assay to analyze positional identity of cells in the neural tube and discovered a potential choroid plexus marker, shown its expression time course, and outlined its early expression pattern in the zebrafish.
by Catherine D. Wolf.
S.M.
Papazoglou, Aimilia. "Cognitive Predictors of Adaptive Functioning in Children with Tumors of the Cerebellar and Third Ventricle Regions." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/psych_theses/33.
Full textMicklewright, Jackie L. "Verbal Learning and Memory Abilities in Children with Brain Tumors: The Role of the Third Ventricle Region." Digital Archive @ GSU, 2006. http://digitalarchive.gsu.edu/psych_theses/11.
Full textFinuf, Christopher Scott. "Third Ventricle Width as a Metric for Fast and Efficient Detection of Atrophy in Traumatic Brain Injury." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5681.
Full textLiu, Yuan. "An improved model based segmentation approach and its application to volumetric study of subcortical structures in MRI brain data." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1273168050.
Full textCheung, Wai-yin Eddie, and 張蔚賢. "Relation between plasma brain natriuretic peptide, right ventricular function and exercise capacity in patients after surgical repair ofTetralogy of Fallot." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45009971.
Full textMartin, Matthieu. "Reconstruction 3D de données échographiques du cerveau du prématuré et segmentation des ventricules cérébraux et thalami par apprentissage supervisé." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI118.
Full textAbout 15 million children are born prematurely each year worldwide. These patients are likely to suffer from brain abnormalities that can cause neurodevelopmental disorders: cerebral palsy, deafness, blindness, intellectual development delay, … Studies have shown that the volume of brain structures is a good indicator which enables to reduce and predict these risks in order to guide patients through appropriate care pathways during childhood. This thesis aims to show that 3D ultrasound could be an alternative to MRI that would enable to quantify the volume of brain structures in all premature infants. This work focuses more particularly on the segmentation of the lateral ventricles (VL) and thalami. Its four main contributions are: the development of an algorithm which enables to create 3D ultrasound data from 2D transfontanellar ultrasound of the premature brain, the segmentation of thigh quality he lateral ventricles and thalami in clinical time and the learning by a convolutional neural networks (CNN) of the anatomical position of the lateral ventricles. In addition, we have created several annotated databases in partnership with the CH of Avignon. Our reconstruction algorithm was used to reconstruct 25 high-quality ultrasound volumes. It was validated in-vivo where an accuracy 0.69 ± 0.14 mm was obtained on the corpus callosum. The best segmentation results were obtained with the V-net, a 3D CNN, which segmented the CVS and the thalami with respective Dice of 0.828± 0.044 and 0.891±0.016 in a few seconds. Learning the anatomical position of the CVS was achieved by integrating a CPPN (Compositional Pattern Producing Network) into the CNNs. It significantly improved the accuracy of CNNs when they had few layers. For example, in the case of the 7-layer V-net network, the Dice has increased from 0.524± 0.076 to 0.724±0.107. This thesis shows that it is possible to automatically segment brain structures of the premature infant into 3D ultrasound data with precision and in a clinical time. This proves that high quality 3D ultrasound could be used in clinical routine to quantify the volume of brain structures and paves the way for studies to evaluate its benefit to patients
Maldonado-Soto, Angel Ricardo. "Platelet-Derived Growth Factor Receptor Beta is a Marker and Regulator of Neural Stem Cells in the Adult Ventricular-Subventricular Zone." Thesis, 2015. https://doi.org/10.7916/D89C6WK8.
Full textWatson, Christopher. "Brain structural connectivity and neurodevelopment in post-Fontan adolescents." Thesis, 2016. https://hdl.handle.net/2144/19163.
Full textChan, Da-Chung, and 程大川. "The measurement of CSF volume and the 3D reconstruction of the ventricle from the brain CT." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/86920549422518851911.
Full text國立成功大學
醫學工程學系
81
In this study, an automated system which can compute the volume ratio of brain parenchyma and cerebral spinal fluid is built for use in clinics as a diagnosis reference. From the results of the phantoms measurements, the average error is about 2.7% for 5 mm scans and 4.3% for 10 mm in a skull filled with 100 cc water ball experiment. However, there's no significant difference between 10 mm and 5 mm scans in the 10 patients measure- ments. Based upon this consequence, it is suggested that the patient may be scanned just by 10 mm interval for saving time and reducing radiation dosage. Some image segmentation methods are also discussed in this thesis, such as pyramid , Laplacian-of-Gaussian operator, and a newly proposed image segmentation scheme, which is so called "Supervised image segmentation scheme." For an image of the size 320x320 , it takes about 10-20 seconds for processing on a DEC 5000/200 workstation with this scheme. After segmentation, the volume measurements of CSF and 3D- display of the brain ventricle are both satisfactorily presented.
Herrmann, Eva Katharina. "Magnetresonanztomographische Darstellung akuter Enzephalitiden und Bestimmung der Ventricle-Brain-Ratio in der akuten Krankheitsphase und im Langzeitverlauf /." 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=013077816&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textGünther, Ann-Kathrin. "Transport of lipid vesicles via the cilia logistic network in the brain of mice." Doctoral thesis, 2018. http://hdl.handle.net/21.11130/00-1735-0000-0003-C1B9-2.
Full textXiang, Wanyi. "Role of the Cell Adhesion Molecule L1 during Early Neural Development in Zebrafish." Thesis, 2008. http://hdl.handle.net/1807/11278.
Full textFaubel, Regina Johanna. "Spatio-temporal Approach to Transport Dynamics in the Mammalian Ventricular System." Doctoral thesis, 2013. http://hdl.handle.net/11858/00-1735-0000-0022-5DC7-8.
Full textHegarová, Markéta. "Příspěvek vyšetření BNP ke zpřesnění prognózy nemocných s pokročilým srdečním selháním." Doctoral thesis, 2017. http://www.nusl.cz/ntk/nusl-357275.
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