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Lecture

Psychology 3325 Lecture Notes - Auditory Cortex, Visual Cortex, Primary Motor Cortex


Department
Psychology
Course Code
Psychology 3325
Professor
John Usher

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Control of Behaviour
regulating physiological functions looks inward (body temperature, blood pressure, nutrient
levels)
Organization of Cerebral Cortex
contains large groove/fissure called central fissure provides important dividing line
between anterior part of cerebral cortex and posterior regions
anterior toward front
posterior toward back
cerbral cortex divided into 4 areas/lobes, named for bones of skulls that cover them: frontal
lobe, parietal lobe, temporal lobe, and occipital lobe
brain contains 2 of each lobe, one in each hemisphere
frontal lobe front portion of cerebral cortex, including Broca's speech area and motor
cortex; damage impairs movement, planning, and flexibility in behavioural strategies
parietal lobe region of cerebral cortex behind frontal lobe and above temporal lobe;
contains somatosensory cortex; is invovled in spatial perception and memory
temporal lobe portion of cerbral cortex below frontal and parietal lobes; contains
auditory cortex
occipital lobe nearmost portion of cerebral cortex; contains primary visual cortex
Regions of Primary Sensory and Motor Cortex
we become aware of events in environment through 5 major senses:
vision, audition, olfaction, gustation, and somatosenses (touch, pain, temperature)
three areas of cerebral cortex receive information from sensory organs
primary visual cortex region of cerebral cortex that receives information directly from
visual system; located on inner surface of occipital lobe
primary auditory cortex region of cerebral cortex that receives information directly
from auditory system; located on inner surface of deep fissure in temporal lobe
primary somatosensory cortex region of cerebral cortex that receives information
directly from somatosensory system and base receives information on taste; located on
vertical strip near middle of parietal lobe
receive information from opposite side of body contralateral (residing in side of
body opposite reference point)
Primary motor cortex region of cerbral cortex that directly control movements of body;
located posterior to frontal lobe within frontal lobe just in front of primary
somatosensory cortex
neurons are connected to different parts of body contralateral
Association Cortex
rest of cerebral cortex accomplishes what is done between sensation and action: perceiving,
learning, remembering, planning, and acting
take place in association areas
anterior is involved in movement-related activities (planning and executing
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