PSYC23H3 Lecture Notes - Lecture 11: Transient Ischemic Attack, Traumatic Brain Injury, Stroke
Document Summary
Bio psych - lecture 11 neurological disorders. You are not responsible for seizures and epilepsy and brain infections. Stroke occurs when brain"s blood supply is interrupted by either bleeding or sudden blockage. This could happen via cerebral hemorrhage or ischemia. This is because the brain cannot store glucose and needs it in constant demand. Excitotoxicity is the ability of excess glutamate to kill cells. Cell death following many strokes is largely caused by excess glutamate activity triggered by disruptions in oxygen. Cerebral hemorrhages may result from aneurysms and can be heridetery or caused by disease. Hypertension is another factor that can result in the hemorrhage. Ischemia is blockage of blood vessels resulting in low oxygen levels. Thrombosis is plug of blood that blocks blood vessels without moving. 2) embolism is a plug that travels until it lodges in a smaller blood vessel. Tia (transient ischemic attack) episodes of stroke symptoms lasting less than 24 hours.
