Abnormal processing of visual motion in dyslexia revealed by functional brain imaging
Article Abstract:
The temporal-lobe motion-sensitive region V5/MT of the magnocellular visual subsystem shows defective visual motion processing in dyslexic individuals. Functional magnetic resonance imaging shows task-related functional activation of the V5/MT in response to a moving stimulus in normal individuals but not in dyslexic men. However, both groups show similar activation of the V1/V2 and extrastriate cortex in response to a stationary stimulus. This defect in visual motion processing may affect the coordination of temporal interaction with other motion-processing regions in dyslexics.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Role of posterior parietal cortex in the recalibration of visually guided reaching
Article Abstract:
Humans possess a high degree of hand-eye coordination as demonstrated by their unique ability reach for objects despite the presence of visual distortions. Positron emission tomography (PET) was used to localize the operations of this form of sensimotor adaptation. Several subjects were asked to undergo the prism-adaptation task and changes in their regional cerebral flow using PET. Results showed that selective activation of the posterior parietal cortex contralateral to the reaching limb occurs.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Growth patterns in the developing brain detected by using continuum mechanical tensor maps
Article Abstract:
A tensor mapping method was used to create spatially complex, four-dimensional quantitative maps of growth patterns in the developing human brain. Children aged 3-15 years were repeatedly scanned over time spans of up to four years. The fastest growth rates occurred at ages 3-6 years in frontal networks that control new action planning.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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