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Lecture

NEUR 2600 Lecture Notes - Anterior Cerebral Artery, Middle Cerebral Artery, Posterior Cerebral Artery

by

Department
Neuroscience
Course Code
NEUR 2600
Professor
Ian Whishaw

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General features of the forebrain, including 3 major parts
-
Disease condition that is characteristic of these structures
-
The Forebrain:
Size
a.
Lobes
b.
c.
Cellular Structure
d.
The neocortex - creates reality
1.
Basal ganglia - reward, associational memory
2.
Limbic (lining) cortex - personal memory
3.
May model some kinds of autism spectrum disorder
In mice, the brain grew to almost double usual size with a souped up beta-caratine gene,
developed sulci and gyri.
Gene involved in this (beta-catenin gene) which is a mutation that causes the heads and brains
of some people to be smaller than normal
-
There are some people born without a cortex (acephalic) or with a small one (micocephalic)
Skull
1.
Dura = hard. Leathery layer
i.
Arachnoid = spider
ii.
These all protect the brain from bacteria
1)
Brain will be thrown forwards into skull despite tissue
a)
Blow and counter-blow
One.
Contusion
Two.
Swelling
Three.
Blood clots
Four.
Coup + Contrecoup
i)
Bounces back to back of head into skull again
b)
Tau = indicates degenerated cells
c)
Don't protect from blows
2)
Pia = soft
iii.
Meninges
a.
Dura, arachnoid and pia
2.
Ventricle gets plugged, the CSF keeps generating with nowhere to go, ventricle
grows bigger and bigger, especially in children
i.
Hydrocephalus
a.
Ventricles I-IV
3.
Protection
Middle cerebral artery
1.
Posterior cerebral artery
2.
Anterior cerebral artery
3.
Circle of Willis
4.
Arch of aorta
5.
Blood Supply
Hemiplegia
Each hemisphere is in control of the opposite side of the body
-
Crossed brain principle
Neocortex is on the outside, and is composed of white matter (fibers, inside) and grey matter (cells,
Telencephalon
January-23-13
10:59 AM
Brain and Behavior Page 1
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