BISC 230Lgx Lecture Notes - Lecture 21: Slow-Wave Sleep, Narcolepsy, Aphasia
9 Apr 2016
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Dolphins don"t have rem sleep: each hemisphere has slow wave sleep one at a ime. Babies have 50% of their 16 hours of sleep as rem. By age 90, no more stage 3 sleep. Sleep during the day when most vulnerable to predators. Growth hormones are released during slow wave sleep. Rats forced to stay awake die ater 3-4 weeks. Narcolepsy: no slow wave sleep before rem sleep, falling asleep randomly o. Temporoparietal area that is crucial for language comprehension. Anterior frontal area in the let brain that is crucial for speech producion - physically forming the sounds. Aphasia: impairment in language ability caused by brain injuries in the let hemisphere. Broca"s aphasia: haling speech, repeaing phrases or words, disordered syntax o. Wernicke"s phasia: luent speech, adequate syntax and grammar, but contrived or inappropriate words o. Speaking a heard word: auditory cortex, wernicke"s area, arcuate fasciculus, broca"s area, motor cortex.
