PSYB65H3 Lecture Notes - Lecture 3: Blood Vessel, Brain Tumor, Angioma
Document Summary
Vascular disorders => things that go wrong with the blood supply. Severe interruption of blood supply to the brain ==> blood carries oxygen and sucrose/glucose to the brain. Disruption in the blood supply results in eschemia, which is a blockage. Infarct dead or dying tissue is a result of a lack of oxygen to that area: can be fast or slow ==> more often fast, slowly: occurs over time: for example, due to cholesterol buildup. It causes a slow reduction in cognitive capacity. The larger the artery, the more massive the damage. Very slow reduction in brain supply which causes an accumulation of small amounts of damage. Transient eschemic attack: temporary migraines caused by musculature on blood supply (vessels) contracting. There are no sensory receptors in the brain. What causes these: thrombosis a locally formed occlusion (blockage). For example, blood clot: embolism plaque breaks off and hits an artery in the brain and blocks it.
