split brain and lateralization of function

Question 1

what is the right hemisphere more specialized for ?

Answer 1

spatial information, patterns, and emotional processing

Question 2

what is the left hemisphere more specialized for ?

Answer 2

speech production and complex language

Question 3

what does the corpus callosum do ?

Answer 3

allows communication between the right and left hemisphere

Question 4

subcortical regions in opposite hemispheres are connected by the corpus callosum. true or false ?

Answer 4

false

Question 5

what is a homotopic callosal connection ?

Answer 5

connecting the same brain region in each hemisphere

Question 6

what is a heterotopic callosal connection ?

Answer 6

connecting different brain regions in each hemisphere

Question 7

which type of callosal connection occur more often ?

Answer 7

homotopic

Question 8

what is the name of patients who had their corpus callosum cut to treat severe epilepsy ?

Answer 8

split brain patients

Question 9

who performed split brain procedures ?

Answer 9

roger sperry

Question 10

what hemisphere controls the left side of the body ?

Answer 10

right hemisphere

Question 11

what hemisphere controls the right side of the body ?

Answer 11

left hemisphere

Question 12

what is a commissurotomy ?

Answer 12

corpus callosum and anterior commissures are surgically severed

Question 13

what is a callosotomy ?

Answer 13

only the corpus callosum is severed, could be partial where there is more activity

Question 14

what happens when the corpus callosum is cut ?

Answer 14

sensory and motor information is still crossed (bc crossover is in the thalamus) and cortical regions in opposite hemispheres cannot communicate

Question 15

where is language production present ?

Answer 15

left hemisphere

Question 16

split brain patients information from the right hemisphere cannot be transferred to the left hemisphere for speaking. true or false ?

Answer 16

true

Question 17

what part of the visual eye pathway is not affect by split brain ?

Answer 17

optic chiasm

Question 18

what is the process for a split brain experiment ?

Answer 18

present stimuli to either the right or left visual field, the other hemisphere will not know what is presented.

Question 19

how will a split brain patient respond to the split brain experiment ?

Answer 19

if seeing right visual field: can say what is shown (left hemisphere dominant for speech
if seeing left visual field: cannot speak what is shown, but can draw what is shown with left hand (no left hemisphere to produce speech, right hemisphere controls left side of body)

Question 20

the right brain is used for ____ processing

Answer 20

automatic

Question 21

the left brain is used for ____ processing

Answer 21

controlled

Question 22

what is cross cuing ?

Answer 22

occurs when a split brain patient attempts to make information accessible to both hemispheres

Question 23

what was the process to determine if there was self awareness in the right hemisphere ?

Answer 23

ps was asked by the researcher “who ____?”. ps was then shown “are you” to his left visual field. bc you cannot speak from the right hemisphere, he was given scrabble tiles to spell out his name. this concluded that the right hemisphere has conscious awareness

Question 24

what are some cues that can aid in cross cuing ?

Answer 24

making a sound, saying something out loud, tongue movement

Question 25

what would the response be when given an emotional visual cue like “kiss” to both hemispheres ?

Answer 25

right hemisphere: would not be able to verbally say what they thought, but would have an emotional experience
left hemisphere: could verbally say they wouldn’t want to kiss or how they felt