Practice question · Multiple choice
A split-brain patient's left hand refuses to button a shirt his right hand has just buttoned. What does that reveal about the intact brain, in which nothing of the kind happens?
Hints
- The conflict is between two hemispheres each doing something purposeful. What normally prevents that?
- Ask what the corpus callosum was doing before it was cut.
Show the answer
C. That each hemisphere can pursue its own goal.
Why
Intermanual conflict makes visible something always true and normally invisible: two hemispheres each able to form a goal, held in agreement by continuous exchange. The implication runs the other way from how it looks, the surgery revealed that unity is maintained rather than given. Whether the right hemisphere has a separate stream of experience remains genuinely unsettled.
Practise Hemispheric Lateralization
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More questions on Hemispheric Lateralization
- Match each description to the structure or principle it names.
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