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Psychology 3325 Lecture Notes - Visual Cortex, Occipital Lobe, Temporal Lobe

Course Code
Psychology 3325
John Usher

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Lateralization of Function
2 hemispheres cooperate with each other but do not perform identical functions some are
lateralized: located primarily on one side of brain
left hemisphere analysis of information (extraction of elements that make up whole of
good at recognizing serial events events whose elements occur one after another
involved incontrolling social behaviour
serial functions include: verbal activities (talking, understanding speech of others, reading
and writing)
right hemisphere specialized for synthesis (putting isolated elements together to perceive
things as whole)
ability to draw (especially 3D), read maps, and construct complex objects out of smaller
corpus callosum large bundle of axons (white matter) that connects cortex of two
connects corresponding parts (left and right temporal lobe, etc)
Vision: Occipital and Temporal Lobes
occipital lobe and lower part of temporal lobe seeing
total damage to primary visual cortex, located in inner surface of posterior occipital lobe,
produces blindness
small lesion in primary visual cortex produces hole in specific part of field of vision
visual field is mapped onto surface of primary visual cortex
visual association cortex is located in rest of occipital lobe and in lower portion of temproal
damage will cause person to be unable to recognize objects by sight
visual agnosia inability of person who is not blind to recognize identity or use of an
object by means of vision
Audition: The Temporal Lobe
primary auditory cortex is hidden from view on inner surface of upper temporal lobe
auditory association cortex is located on lateral surface of upper temporal lobe
damage to left auditory association cortex causes severe language defecits no longer
able to comprehend speech (lost neural circuits that decode sound) and produce
meaningful speech --> aphasia
damage to right auditory association cortex doesnt seriously affect speech perception or
production but does affect ability to recognize nonspeech sounds, including patterns of
tones and rhythms and can also impair ability to perceive location of sounds in
Somatosensory and Spatial Perception: the Parietal Lobe
primary sensory function of parietal lobe is perception of body but also involved in muc more
than somatosensation
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