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Lecture

PSYB65H3 Lecture Notes - Lateral Sulcus, Postcentral Gyrus, Frontal Lobe


Department
Psychology
Course Code
PSYB65H3
Professor
Ted Petit

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Lec02
Basic organization of the brain
How is it basically structured
o Spinal cord forebrain
Outline
Structure of the human brain
o Lobes of the cerebral cortex
Vast majority of human brain
Stroke in brain stem dead
Stroke in cerebral cortex diagnosable
Function and organization of cerebral hemispheres
Ventricles
Meninges
Blood supply of the brain
o Strokes
o Tumors
Cerebral cortex
Gyrencelphalic vs Lissenphalic
Gyrencelphalic
o With gyri and sulci
Human brain

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o Gyri mountains
o Sulci fissures
Lissenphalic
o Smooth
Rat brain
Cerebral hemispheres
Human brains separated into left and right hemispheres
o Mirror images
o Not exactly alike slight differences
Right brain (hemisphere)
o Controls and receives information from left side of the body
Contralateral
Left brain (hemisphere
o Controls and receives information from right side of the body
Contralateral
Corresponding on the opposite side of the body
Corpus callosum connects the two hemispheres
o
Three main sulci
o Longitudinal fissure divides the two hemispheres
AKA longitudinal sulcus
o Central sulcus
AKA central fissure
Divides brain from front to back
Separates frontal and parietal lobes
o Sylvian fissure
AKA lateral fissure
Separates frontal lobe and temporal lobes

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Corpus Callosum
Cerebral lobes
Four lobes on each hemisphere (technically)
Fore lobes in general
o Frontal lobe
o Parietal lobe
o Temporal lobe
o Occipital lobe
Each lobe has one major primary function
Each lobe has two different types of cortex
o Primary
Responsible for performing basic input / output function
Area that is responsible the primary function of the specific lobe
o Associational
Higher order function
Compared to primary basic functions
More recently evolved
Humans more association cortex
Brodmann’s map of the brain
Numbered areas of the brain
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