PSYB65H3 Lecture Notes - Lecture 3: Intracerebral Hemorrhage, Transient Ischemic Attack, Brain Tumor
Document Summary
Blood carries oxygen and sugars => oxygen is most critical bc person can only stay alive ~3 min w/o oxygen. => brain has a very high metabolic rate, so cannot stay alive w/o oxygen even for very short periods. => first organ to be damaged from a problem like a heart attack. Types of problems: cerebrovascular accident (cva, stroke): severe interruption of blood supply to the brain. => results in ischemia (not enough blood/not enough oxygen); blood will be missing glucose/o2. => produces dead/dying tissue/severely damaged tissue infarct: encephalomalecia: very slow reduction in blood supply, due to long term blockage of arteries due to plaque/obstruction. => softening of the brain tissue some tissue death, but tissue as a whole hasn"t completely died; may see swelling of tissue. => incomplete tissue death, some cells may be dying, others healthy: transient ischemic attack: temporary (comes and goes) restriction of blood flow, involving musculature of a particular blood vessel.
