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Flashcards in chapter 11 info neuropsych Deck (12):
1

laterality

left and right hemi have different funtions

2

four variables that complicate laterality research

not absolute, cerebral site just as important as cerebral side, laterality affected by environmental and genetic factors, laterality exhibited by range of animals

3

planum temportal

larger in left hemi, words, right ear

4

heschles gyrus

larger in right hemi, differentiate tone, left ear

5

double dissociation

2 areas of the cortex functionally dissociated by 2 behavioral tests, each test affected by lesion in one side, not other

6

commissurotomy

procedure that cuts the corpus callosum so the 2 hemispheres no longer communicate, split brain (see faces in r hemi)

7

wada test

injection of sodium amobarbital to produce period of anesthesia in 1 hemi, allows study of each to determine what part of brain actually does what

8

asymmetry in visual system

tachistoscope-present visual info to each hemi independently, infer which is better at processing certain types of info by looking at accuracy of identification in each visual field

9

asymmetry in auditory system

dichotic listening-simultaneous presentation of 2 diff stimuli to each ear, report which heard most clearly, L ear advantage for musical/tonal quality, R ear advantage for verbal stimuli

10

asymmetry in somatosensory system

blindfold and perform tasks with hands (diff in efficiency evidence of lateralization)
dichaptic test-subjects feel object and identify those they touched, R hemi advantage for shapes, left hemi advantage for letters

11

asymmetry in motor system

apraxia, direct observation to see which hand is more active, Wolf and Goodale said r side of mouth opens wider and quicker for verbal and nonverbal tasks, facial expressions sooner on left side, interference tasks

12

z-score

x-xbar/standard deviation