PSYB64H3 Chapter Notes - Chapter 15: Traumatic Brain Injury, Chronic Traumatic Encephalopathy, Stroke
Document Summary
Risk factors: age, hypertension, smoking, diabetes, high cholesterol, obesity and use of alcohol, cocaine, amphetamines heroin, and other drugs. Increased risk: arteries are narrowed gradually cerebral hemorrhage: condition caused by bleeding in the brain. Gradually results from hypertension or structural defects in arteries serving brain. Some occur due to rupture of aneurysms: balloon like bulge in wall of an artery. Interferes w/ blood supply to neurons and flooding areas of brain w/ salty blood that dehydrates and kills nearby neurons. Blockages of blood vessels result in ischemia: condition in which inadequate blood flow results in insufficient quantities of oxygen being delivered to tissue. Often results in death of neural tissue figure 15. 3, p. 433: infarct: area of dead neural tissue. Transient ischemic attacks (tias): brief (42hr or less) episode of stroke symptoms that does not cause permanent damage thrombosis: blockage that doesn"t move from its point of origin in a blood vessel.
