PSYB55H3 Chapter Notes - Chapter 3.5: Traumatic Brain Injury, Orbitofrontal Cortex, Blast Injury
Document Summary
Traumatic brain injury (tbi) is a form of brain injury resulting from an accident such as a diving accident, bullet wound, or blast injury. The damage in tbi is usually longwinded w/ damage to both grey and white matter tracts from the accelerative forces experienced at the time of the injury. Brain lesions, either naturally occurring (in humans) or experimentally derived (in animals), allow experimenters to test hypotheses concerning the functional role of the damaged brain region. Cerebral vascular accidents, or strokes, occur when blood flow to brain is suddenly disrupted. Angiography is used to evaluate the circulatory system in the brain. Tumors can cause neurological symptoms either by damaging neural tissue or by producing abnormal pressure on spared cortex and cutting off its blood supply. Neurological trauma can result in damage at the site of the blow (coup) or at the site opposite to the blow b/c of reactive forces (countercoup).
