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PSYB65H3 (525)
Ted Petit (310)
Lecture

Lecture 3

5 Pages
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Department
Psychology
Course Code
PSYB65H3
Professor
Ted Petit

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PSYB65H3 Lecture 3 (Sept 27, 2010)
Exam Format
Information from lecture + Information from textbook (even if he doesnt talk about
it)
No dates
Will not ask any questions that are in a table (those that are not in textbook) , only
the text from the textbook
Midterm Exam Date: (Monday) November 1, 5-7pm
Exam is multiple choice
Main Teaching Points:
1.Things that go wrong with the nervous system eg. Stroke, traumas
2.Glial Cells and diseases that pertain to glial cells
Problems in Vascular System (Blood Flow)
Blockage in blood flow = lack of oxygen and glucose (critical)
Brain has high metabolic rate, a short period without oxygen is devastating
Brain damage
A.Types of Blockage of Blood flow
1.Cerebral Vascular Accident (CVA)
Most commonly called as stroke
Severe interruption of blood supply to the brain
Interruption of blood supply result in ischemia problem in blood supply, not
enough blood
oNot enough blood supply = not enough glucose and oxygen supplied to
the brain
Produces dead / dying tissue (infarct)
oInfarct tissue that is very damaged and has a lot of dying tissue 2
2.Encephomalacia
Lack of blood supply but very slow
Not rapid, very slow blockage in which blood vessels slowly breakdown
Result of very slow reduction in blood supply to the brain
Results in softening of the brain tissue getting some dead in the brain tissue
or swelling but death is not complete
3.Transient Ischemic Attack (TIA)
Sudden lack of oxygen that is temporary
Usually involves a typical musculature vessel
Eg. Migraine headaches
During constriction, there is a lack of blood supply to a particular part of the
brain
Short duration comes and goes
Causes that result in disruption in blood flow
www.notesolution.com
PSYB65H3 Lecture 3 (Sept 27, 2010)
Thrombosis locally formed blockage
oBlood clot can form at a single spot in the brain
Embolism a blockage that breaks off from someplace else
oA clot can break off from somewhere and become lodged at another
location
Arteriosclerosis general clogging of the arteries
oSlow reduction in blood supply results in encephomalacia
oHarding of the arteries (slow process)
B.Types of Blood Vessels Bursting
1.Cerebral Hemorrhage
Massive bleeding into the brain tissue itself
Busted blood tissue that is bleeding into the brain tissue itself
Can be life threatening
It is most often associated with high blood pressure
Cerebral hemorrhage kills the tissue where the bleeding is
2.Subdural Hematoma
Bleeding into the space between the skull and the brain itself
Bleeding underneath the dura mater (in Subaranoid space, where the vessels
are) bleeding outside the brain (in the meninges)
Doesnt kill the brain tissue itself directly if caught on time; causes pressure
on the brain
oIf caught in time, pressure can be released and no brain damage will
occur
3.Angioma
A collection or mass of enlarged abnormal blood vessels that can shunt blood
in the wrong direction
Blood vessels are inherently weak; if under high pressure, it can burst
(leading to a stroke)
Usually congenital
4.Aneurism
Vascular dilation - expanded blood pressure caused by localized problems in
elasticity
Generally has no symptoms
Can result in hemorrhage
Slide 1
Subdural Hematoma
Bleeding has occurred in skull; pressure is pushing the brain way over (deforming
the brain)
Release of pressure can be done by drilling a hole in the skull to release the blood
Closed Head Injuries
www.notesolution.com

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Description
PSYB65H3 Lecture 3 (Sept 27, 2010) Exam Format Information from lecture + Information from textbook (even if he doesnt talk about it) No dates Will not ask any questions that are in a table (those that are not in textbook) , only the text from the textbook Midterm Exam Date: (Monday) November 1, 5-7pm Exam is multiple choice Main Teaching Points: 1. Things that go wrong with the nervous system eg. Stroke, traumas 2. Glial Cells and diseases that pertain to glial cells Problems in Vascular System (Blood Flow) Blockage in blood flow = lack of oxygen and glucose (critical) Brain has high metabolic rate, a short period without oxygen is devastating Brain damage A. Types of Blockage of Blood flow 1. Cerebral Vascular Accident (CVA) Most commonly called as stroke Severe interruption of blood supply to the brain Interruption of blood supply result in ischemia problem in blood supply, not enough blood o Not enough blood supply = not enough glucose and oxygen supplied to the brain Produces dead dying tissue (infarct) o Infarct tissue that is very damaged and has a lot of dying tissue 2 2. Encephomalacia Lack of blood supply but very slow Not rapid, very slow blockage in which blood vessels slowly breakdown Result of very slow reduction in blood supply to the brain Results in softening of the brain tissue getting some dead in the brain tissue or swelling but death is not complete 3. Transient Ischemic Attack (TIA) Sudden lack of oxygen that is temporary Usually involves a typical musculature vessel Eg. Migraine headaches During constriction, there is a lack of blood supply to a particular part of the brain Short duration comes and goes Causes that result in disruption in blood flow www.notesolution.com
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