AAMC PSYCHOLOGY SECTION BANK-corpus callosum

[holdmystethoscope]

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I am having trouble with question 83! If corpus callosum is severed, can the visual info from right visual field can still travel to the language processing center of the left hemisphere? Aren't the two hemisphere technically seperated because there is no corpus callosum?

 

[aldol16]

I am having trouble with question 83! If corpus callosum is severed, can the visual info from right visual field can still travel to the language processing center of the left hemisphere? Aren't the two hemisphere technically seperated because there is no corpus callosum?

Yes, it can. Crossover of visual information occurs at the level of the optic chiasm. So the visual inputs from your right field still get to your left hemisphere and vice versa. The problem is that information from the left field will go to the right hemisphere, where it's now "stuck" and can't cross to the left hemisphere to be accessed by the language center.

 

[NextStepTutor_2]

I am having trouble with question 83! If corpus callosum is severed, can the visual info from right visual field can still travel to the language processing center of the left hemisphere? Aren't the two hemisphere technically seperated because there is no corpus callosum?

Hi @holdmystethoscope !

You forgot the splitting of the visual info that occurs at the level of the optic nerve/eyes themselves.

This occurs before you would need to worry or consider inter-hemispheric communication.


Hope this helps, good luck!