Question

How can researchers be sure that a stimulus that is restricted to the isolated left hemisphere of a split-brain patient has been perceived and understood?

A. The isolated left hemisphere does not typically exhibit any signs of understanding of stimuli presented only to it

B. While they can't verbalise information about stimuli presented to the left hemisphere, split-brain patients can use manual gestures or pantomime to indicate what they have seen

C. Patients can use subtle shifts in body position or limb movements to cue the right hemisphere about the nature of the stimulus

D. Just ask them. Patients can typically verbalise information presented to left hemisphere

Answer 1

Option a is wrong as the patient can typically exhibit some signs and symptoms about the stimulali as well as he will verbalise about the stimulali as the speech control centre is on the left side of the brain

Option b is wrong as the patient can verbalise the condition and in this case the left side of hemisphere is stimulated so they can verbalise it

Option c is wrong as in split brain condition the corpus callosum is severed or destroyed so both the hemisphere of brain will act as 2 different parts . Our body will act like there is 2 brain and the stimulali and perception of both sides will be different so it is wrong that right hemisphere will not cause movement cues

Option d is the answer as ,if the researcher ask to the patient about the stimulali then the patient will be able to verbalise about it as the stimulali will reach the left side of the brain as well as the speech control centre is also situates on the left side so patient will be able to respond about the stimulali

:)