BIOL 382 Chapter Notes - Chapter 9: Poliovirus, Spinal Cord, Insulin Resistance
Document Summary
Ch 11: 412 - 413 closer look: essay: pleasure me. Reward neurotransmitter released in ventral tegmental area (vta), nucleus accumbens and amygdala. Methamphetamine - stimulate brain for pleasure rush, short lived. Crack has higher high than cocaine and fast crash. More cocaine = less dopamine and less reward feeling. Ch 12: 464 - 465: brain injuries and disorders. Concussion: brain altered after blow to head. Can bruise brain and cause permanent damage subdural/subarachnoid hemorrhage. Bleeding from ruptured vessels into those spaces. Aka stroke, 3rd largest cause of us deaths. Happens when blood to brain area is blocked and brain tissue dies of ischemia. Reduction of blood supply impairs o2 and nutrient delivery. Temporary episode of stroke, lasts 5 to 50 minutes. Happens from degeneration of dopamine-releasing neurons of substantia nigra. Basal nuclei and cerebral cortex degenerate: 470 - 471. Elastic and stretches along w/ head turns and trunk bends. Damage to dorsal roots or sensory tracts, loss of sensation.
