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PSYB65H3 (519)
Ted Petit (310)


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University of Toronto Scarborough
Ted Petit

Human Brain and Behaviour - Lecture 3 Vascular supply of the brain what can go wrong - blockage - cerebral vascular accidents (CVA) (some kind of problem) - refer to a stroke - generally refers to a severe interruption of the blood supply to the brain - whenever this happens, results in ischemia - not getting enough oxygen or glucose - sometimes by suffocating, blood clots - infarct - area of the brain that is dead - can be slow or fast - the larger the artery, the larger the area of the brain that will be destroyed - encepholo malacia - refers to a situation where the blood supply loss occurs very slowly - softening of the brain tissue; deteriorating - causes of some cases of dementia - Transient Ischemic Attack - not enough oxygen going to the brain - most often seen in migraines - usually involves the muscles that surround the blood vessels - not a complete blockage - most common symptom is vision causes of blockage - thrombosis - locally formed occlusion - most common - blood clots - usually the elderly, sedentary; not enough pumping of the blood - embolism - blockage that is formed elsewhere in the body - migrates through the blood stream and lodges in the brain - most common cause; break off from the legs (from no pumping of blood) and flows through the vascular supply and lodges in the brain, heart, etc - causes strokes, heart attacks - arterial sclerosis/arteriosclerosis - hardening of the arteries - when fat, cholesterol and other substances build up in the walls of the arteries and form hard structures called plaques - can also break off and migrate to the brain - can also build up in the brain Human Brain and Behaviour - Lecture 3 - cerebral hemorrhage - massive bleeding into the brain itself - can be life-threatening, depends on where it occurs, what blood vessel burst - subdural hematoma - collection of blood from broken blood vessel on the surface of the brain - creates a great deal of pressure on the brain - ventricular fluid pushed to one side - Angioma -
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