نتایج جستجو برای: gray matter
تعداد نتایج: 242801 فیلتر نتایج به سال:
OBJECTIVE To assess the role of gray and white matter volume loss vs seizures in cognitive impairment of children with Sturge-Weber syndrome with unilateral involvement. DESIGN Patients were enrolled in this prospective cohort during a period of 3 years. SETTING Pediatric neurology clinic with national referral through the Sturge-Weber Foundation. PARTICIPANTS Twenty-one children (age ran...
Emerging evidence supports that premature infants are susceptible to both cerebral white and gray matter injury. In a fetal rabbit model of placental insufficiency, preterm rabbits at embryonic day 22 (E22) exhibited histologic evidence of gray matter injury but minimal white matter injury after global hypoxia-ischemia (H-I). We hypothesized that the dissociation between susceptibility to gray ...
CONTEXT Studies investigating abnormalities of regional gray matter volume in autism spectrum disorder (ASD) have yielded contradictory results. It is unclear whether the current subtyping of ASD into autistic disorder and Asperger disorder is neurobiologically valid. OBJECTIVES To conduct a quantitative meta-analysis of voxel-based morphometry studies exploring gray matter volume abnormaliti...
OBJECTIVE Magnetic resonance imaging (MRI) studies of schizophrenia reveal temporal lobe structural brain abnormalities in the superior temporal gyrus and the amygdala-hippocampal complex. However, the middle and inferior temporal gyri have received little investigation, especially in first-episode schizophrenia. METHOD High-spatial-resolution MRI was used to measure gray matter volume in the...
This study aimed to investigate whether magnetization transfer imaging (MTI) parameters of cortical gray and white matter and subcortical gray matter structures differ between subjects enriched for human familial longevity and control subjects to provide a thorough description of the brain phenotype of familial longevity. Moreover, we aimed to describe cerebral ageing effects on MTI parameters ...
Abstract The aim of the present study was to investigate the relationship between perfectionism, as a personality trait, and the brain structure. A total of 49 volunteers (23 women, 26 men) participated in this study by filling a Farsi version of the Positive and Negative Perfectionism Scale (FPANPS) and attending an MRI session. Voxel-based morphometry (VBM) method was used to analyze the MRI...
the purpose of this study is to survey cross section changes of the animal brain samples during the tension and compression tests and comparison of the experimental results for three animals: bovine, sheep, and rabbit. a linear elastic theory with considering the necking in tension and barreling in compression has been considered for brain tissue. bridgman method for tension and cross section u...
OBJECTIVE The prefrontal cortex exhibits prominent functional, biochemical, and anatomic abnormalities in schizophrenic patients. However, smaller than normal volume of the frontal lobe has not been found in previous postmortem studies of schizophrenic subjects, and magnetic resonance imaging (MRI) scans of schizophrenic subjects have not consistently revealed frontal volumetric deficits. The v...
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