PSYB64H3 Chapter 15: Detailed Textbook Notes - Chapter #15
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Brain damage: damage can occur due to interruptions in the blood supply and from blows to the head, growth of tumors and the abnormal electrical activity of seizures can also interrupt normal brain functioning. Strokes are caused by bleeding or the interruption of the supply of oxygen to the brain, leading to excess glutamate activity and localized neural death, or infarct. Head injuries are classified as open, in which the brain is penetrated, or closed, in which the brain is not penetrated. Although neurons usually do not form tumors, tumors can arise in the glial cells and meninges of the brain. Multiple sclerosis is an autoimmune disorder in which the oligodendrocytes forming myelin in the central nervous system are damaged. Migraine, once believed to be the result of a vascular disorder, might arise due to (cid:374)eural e(cid:448)e(cid:374)ts i(cid:374) a (cid:271)rai(cid:374)ste(cid:373) (cid:862)(cid:373)igrai(cid:374)e ge(cid:374)erator(cid:863) that i(cid:374)(cid:448)ol(cid:448)es the neurotransmitter serotonin. Includes tests of intellect, sensation, motor function, attention and psychological disorder.
