NESC 3227 Lecture Notes - Word Stem, Neural Substrate, Basal Ganglia
17 Apr 2013
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Document Summary
Even with head injuries where there doesn"t appear to be any local damage, disconnection syndromes can still occur. In mild tbi the axons become compacted, can repair itself. In moderate tbi, axon sheared and end forms a bulbous structure, does not repair. Born without a callosum: often have compensatory intrahemispheric projections, large anterior commissure, good ipsilateral projections. Slow in reaction time for interhemispheric tasks, but usually get them right still. When combined with fmri, you can get an idea as to what areas of the brain are activated and what the connections are between the two. Span of attention: limited capacity, no more than 5-8 items kept in store, need rehearsal to keep this memory, otherwise it fades, verbal span like a phone number, spatial like tapping out a block sequence. Neural systems of immediate memory - parietal, lateral temporal or frontal cortical regions. Damage to any one region alone will not wipe out stm in its entirety.
