CAS PS 231 Lecture Notes - Lecture 1: Commissure, Nostril, Laterality
15 Sep 2016
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Corpus callosum: massive set of axons sending information between the hemispheres, connects l & r hemispheres. Split-brain people: have undergone surgery to/severing of corpus callosum: maintains intellect, motivation, walk, but struggle w/unfamiliar tasks, damage to corpus callosum people act as if they have separate minds, at first, hemispheres fight, commissures eventually help compensate. Left: mostly highly coupled, non-overlapping connections between vertically arranged column. Small receptive fields for precise coding of small differences and repetition, fine motor movements; sequencing; timing; Right: horizontal axonal overlapping connections dominate, and cell groups over large distances overlap in their connections, big picture, diffuse, less repetitive information, as in visuo-spatial patterns or musical patterns. rhythm. Sequential processing: analytic, rational, dominant for speech production, details = s . Synthetic: dominant in perceiving the emotions in peoples gestures, tone of voice and facial expressions. Left: various aphasias and apraxias (depending upon location, unable to perform a task when asked even though movement and language comprehension are normal.
