نتایج جستجو برای: brain white matter

تعداد نتایج: 816563  

Journal: :AJNR. American journal of neuroradiology 2006
A M Wong E M Simon R A Zimmerman H-S Wang C-H Toh S-H Ng

BACKGROUND AND PURPOSE The clinical outcome of acute necrotizing encephalopathy of childhood (ANEC), an encephalopathy characterized by symmetrical involvement of the thalami, has historically been poor, but recent studies have reported better outcomes. By devising a MR imaging scoring system, we determined the relationship between characteristic MR findings and clinical outcome of patients wit...

Journal: :Otolaryngologia polska = The Polish otolaryngology 2009
Tatiana Gierek Jarosław Paluch Przemysław Pencak Beata Kaźmierczak Lucyna Klimczak-Gołab

Diffusion tensor imaging is unique in its ability to non-invasively visualize white matter fiber tracts in the human brain in vivo. White matter fiber bundles of the human brain form a spatial defined by the anatomical and functional architecture. Determination of axonal pathways provides an invaluable means to study the connectivity of human brain and its functional network. Comparison of fibe...

2014
Jodie R. Gawryluk Erin L. Mazerolle Ryan C. N. D'Arcy

Functional magnetic resonance imaging (fMRI) is a non-invasive technique that allows for visualization of activated brain regions. Until recently, fMRI studies have focused on gray matter. There are two main reasons white matter fMRI remains controversial: (1) the blood oxygen level dependent (BOLD) fMRI signal depends on cerebral blood flow and volume, which are lower in white matter than gray...

Journal: :Journal of affective disorders 2011
Ming Wei Tham Puay San Woon Min Yi Sum Tih-Shih Lee Kang Sim

BACKGROUND Until more recently, most studies have examined the changes in brain gray matter in major depressive disorder (MDD) with less studies focusing on understanding white matter pathology in MDD. Studies of brain white matter volume changes, connectivity disruptions, as well as genetic factors affecting myelination can throw light on the nature of white matter abnormalities underpinning M...

Journal: :مجله علوم اعصاب شفای خاتم 0
shahrokh nasseri medical physics department, mashhad university of medical sciences, mashhad, iran mehdi momennezhad a. medical physics department, mashhad university of medical sciences, mashhad, iran b. nuclear medicine research center, mashhad university of medical sciences, mashhad, iran hossein akbari-lalimi medical physics department, mashhad university of medical sciences, mashhad, iran

introduction: voxel based morphometry is a type of statistical parametric mapping that can be used to investigate the effect of diseases such as epilepsy, alzheimer's disease and parkinson's disease or other agent such as skills on brain structure (white matter, gray matter and cerebrospinal fluid). the aim of this study is evaluate the effectiveness of this method in detection of dif...

Journal: :Annales UMCS, Informatica 2006
Olena Buczko Pawel Mikolajczak

The paper presents a method to examine brain structures in neuroanatomy changes which result in dementia in magnetic resonance images by using fractal analysis techniques. We measured the relationship between the fractal dimensions of white matter and grey brain matter and the relationship between the fractal dimensions of the forebrain and the white brain matter. The investigation showed that ...

Journal: :American journal of physiology. Heart and circulatory physiology 2016
Ádám Nyúl-Tóth Maria Suciu Judit Molnár Csilla Fazakas János Haskó Hildegard Herman Attila E Farkas József Kaszaki Anca Hermenean Imola Wilhelm István A Krizbai

The blood-brain barrier (BBB) is the main interface controlling molecular and cellular traffic between the central nervous system (CNS) and the periphery. It consists of cerebral endothelial cells (CECs) interconnected by continuous tight junctions, and closely associated pericytes and astrocytes. Different parts of the CNS have diverse functions and structures and may be subject of different p...

Journal: :The British journal of psychiatry : the journal of mental science 2005
Colm McDonald Ed Bullmore Pak Sham Xavier Chitnis John Suckling James MacCabe Muriel Walshe Robin M Murray

BACKGROUND It is unclear whether schizophrenia and psychotic bipolar disorder are associated with similar deviations of brain morphometry. AIMS To assess volumetric abnormalities of grey and white matter throughout the entire brain in individuals with schizophrenia or with bipolar disorder compared with the same control group. METHOD Brain scans were obtained by magnetic resonance imaging f...

Journal: :Journal of neurophysiology 2016
Christopher M Filley R Douglas Fields

Whereas the cerebral cortex has long been regarded by neuroscientists as the major locus of cognitive function, the white matter of the brain is increasingly recognized as equally critical for cognition. White matter comprises half of the brain, has expanded more than gray matter in evolution, and forms an indispensable component of distributed neural networks that subserve neurobehavioral oper...

Journal: :Brain : a journal of neurology 2003
M R Herbert D A Ziegler C K Deutsch L M O'Brien N Lange A Bakardjiev J Hodgson K T Adrien S Steele N Makris D Kennedy G J Harris V S Caviness

High-functioning autistic and normal school-age boys were compared using a whole-brain morphometric profile that includes both total brain volume and volumes of all major brain regions. We performed MRI-based morphometric analysis on the brains of 17 autistic and 15 control subjects, all male with normal intelligence, aged 7-11 years. Clinical neuroradiologists judged the brains of all subjects...

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