17 Cortical Networks and Disconnection Syndromes Notes Copy.pdf - adapability Now we r looking c connections viabrain t connections b w various regions

17 Cortical Networks and Disconnection Syndromes Notes Copy.pdf

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Corticalsurfaceimportant foralth flexibility adapability Now we r looking c connections via brain 17 Cortical Networks t Disconnection syndrome connections b w various regions of the cortex connections b w the 2 hemispheres Commissural fibre represents greatest of axons that connects 2 hem 2g ether Anterior commissure 2 frontal lobes Posterior commissure 2 backsides Intermediate mass 2 sides of thalmus Hippocampal commissure both hippocampi Corpus callosum Portrait At Cross Purposes DM Director of large psychiatric hospital Developed symptoms of headaches memory problems Cyst in 3rd ventricle drained to relieve pressure causing symptoms cannula inserted through dorsal surface of brain through corpus callosum part of brain stem Good recovery headaches disappeared memory improved returned to work some memory difficulties But hands were not working together intermanual conflict surgeon cut part of Corpus callosum severing the connections linking the hands in the 2 hemispheres Cannula comming down goes through corpus callosum t also has to gothrough fornix part of limbic system might be why he's having memory issues Ppl who have had to drain 3rd ventricle only see persistent memory issues when they have bilateral damage 1 Interruption of fornix have anterograde memory deficits toss ability to form new memories 17.1 DisconnectingCognitive Functions 1 Anatomically defined cortical lobes each engage in a wide range of cognitive activites ex temporal lobe mainly vision audition but also memory language t emotion 2 Cortical lobes engage in diff cognitive activity but also overlap in function
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Disconnections cutting of cerebral connections Disconnection syndrome behavioural effects of disconnections John Downer's Experiment w Monkeys
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  • Winter '19
  • Jennifer Hoshooley
  • Left-handedness, Corpus callosum, anterior commissure, nondominant hemisphere, Callosal Connections

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