Textbook Notes (368,123)
Canada (161,661)
Psychology (9,695)
PSYB65H3 (479)
Ted Petit (185)
Chapter 4

Study guild for final ! (71 pages of SOLID notes - chapters 4,7,8,9,10,11,15,16)

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Ted Petit

[Pick the date] [TYPE THE DOCUMENT TITLE] Visual information presented in the left visual field is transmitted to the primary visual cortex of the RH from the nasal hemiretina of the left eye and the temporal hemiretina of the right eye Visual information presented in the right visual field is transmitted to the primary visual cortex of the LH from the temporal hemiretina of the left eye and the nasal hemiretine of the right eye Information is perceived in the visual cortex of one hemisphere is communicated to the other hemisphere via the corpus callosum • Divisions of information between the hemiretinas occurs only in the periphery of the retina – fovea (center of the retina that is used for fine detail and color vision) automatically transmits information to both the right and left visual cortex Techniques that investigate laterality of visual functions must take care to present stimuli peripherally and not to allow the fovea to observe the stimulus o Achieved by having the participant stare at a point at the center of the screen while keeping the stimulus away from the center of the visual field (>1 degree from the center) o Stimuli is presented very briefly (150 > ms) o Allows eyes to have no chance to make movements from center of the screen, preventing the fovea from viewing the stimulus and sending the information to both hemisphere Auditory System • Is not as segregated as the visual system – all receptors in the cochlea send projections bilaterally; auditory information received in one ear is sent to both hemispheres • Projections to the ipsilateral hemisphere are weaker and less numerous and send information more slowly than projections to the contralateral hemisphere do Although both hemisphere can attend to stimuli presented to either ear, situations in which information must compete result in the domination of contralateral projections o When competing stimuli are presented to the two ears simultaneously, the RH will preferentially attend to the input from the left ear, and vice versa Information is sent to the other via the commissural systems Dichotic Listening • Takes advantage of the suppression of ipsilateral projections that takes place when stimuli compete with each other • Dichotic listening tasks present different stimuli to each ear Stimuli: words, music, emotional tones, phonemes www.notesolution.com
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