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LEC04 - NROB60
CORTICAL FUNCTIONS AND CELLS
LECTURE OUTLINE
-> FUNCTIONAL CORTICAL AREAS OF BRAIN
-> BRAIN CELLS
- PROTOTYPICAL NEURON
- CORTICAL CYTOARCHITECTURE
- GLIA CELLS
[1,2,3,4]
FUNCTIONAL AREAS OF BRAIN
- Cerebral cortex is divided into 4 lobes:
What is each PRIMARILY involved in?
1. Frontal lobe
- voluntary movemt
- expressive lang
- executive fcning
- working mem. (aka ST-mem)
2. Temporal lobe
- hearing
- smell
- LT-mem
- receptive lang.
3. Parietal lobe
- somatosensation (touch, pain, T)
- speech comprehension
- reading ability
- production of writing
- production of calculation
- visual-spatial fcning
4. Occipital lobe
- visual perception
About Occipital Lobe
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- is the simplest
- primarily involved w/ vision
[5]
FUNCTIONAL AREAS OF BRAIN
Notes to Consider
- this pic. is from Appendix
- these divisions differ from those studied on sheep brain
- lateral view, NOT dorsal view
- post-central gyrus is posterior to central sulcus, while pre-central gyrus is anterior
- inferior to both central sulcus and pre-central gyrus is Lateral (Sylvian) fissure
- inferior to Lateral (Sylvian fisusre) is Superior temporal gyrus
Central sulcus
- divides the two "central" gyri
- pre-central gyrus anterior to it
- post-central gyrus posterior to it
- precentral gyrus
- site of primary motor area
- post-central gyrus
- site of somatosensory area
Correct Interpretation
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I think she meant that area of precentral gyrus is primary motor, and area of
postcentral gyrus is primary sensory [yes]
[6]
FUNCTIONAL AREAS OF BRAIN
MAJOR SENSORY, MOTOR AND ASSOCIATION AREAS OF CORTEX
PRIMARY MOTOR CORTEX
- lies in precentral gyrus
- contralateral control of body movemt
- ie. controls movement of opp. side of body
(ex) if its on L-hemi, then controls R-side of body
- motor fcns are controlled by opp. side of body
=> contralateral control
PRIMARY SENSORY CORTEX
- lies in post-central gyrus
- contralateral involvement in sensation
- involved in sensation from contralateral (opp.) side of body
- also involved w/ contraateral input wrt sensation
ASSOCIATION AREAS
- bulk of cerebral cortex
- aka associational cortex
- the key base for human cognition
- involvement in
- higher order processing for sep. sensory/motor modalities
- integration of multiple modalities
- has lot of higher order processing occurring
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Document Summary

Cerebral cortex is divided into 4 lobes: What is each primarily involved in: frontal lobe. Working mem. (aka st-mem: temporal lobe. These divisions differ from those studied on sheep brain. Post-central gyrus is posterior to central sulcus, while pre-central gyrus is anterior. Inferior to both central sulcus and pre-central gyrus is lateral (sylvian) fissure. Inferior to lateral (sylvian fisusre) is superior temporal gyrus. Ie. controls movement of opp. side of body. I think she meant that area of precentral gyrus is primary motor, and area of postcentral gyrus is primary sensory [yes] Major sensory, motor and association areas of cortex. Contralateral control of body movemt (ex) if its on l-hemi, then controls r-side of body. Motor fcns are controlled by opp. side of body. Involved in sensation from contralateral (opp. ) side of body. Also involved w/ contraateral input wrt sensation. Has lot of higher order processing occurring. Higher order processing for sep. sensory/motor modalities.

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