PSYC 1020H Lecture Notes - Lecture 11: Receptive Aphasia, Expressive Aphasia, Gibberish
30 Nov 2016
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Regardless of modality, sign and speech, recruit wernicke and broca regions. Have arousal and sometimes go in and out of awareness. Know everything, but cannot communicate or move other than blinking. Used to see if someone is alive or not, by injecting dye to see if blood is flowing to the brain. Stick sensors on typically the head/ earlobe. Checks the voltage from different points of the brain. Measures the activity of thousands of neurons within the 1-2 mm outer surface of the cortex. The activity you are measuring is only on the outer surface of the brain. A stimulus that resets the biological clock [ex. / bright light] Slow wave sleep [sws] is stage 3 and 4. Transition from wakefulness to the onset of sleep. Characterized by low voltage eeg activity that will develop into sinusoidal alpha. Heart rate slows, slow rolling eye movements, hypnic jerks, hypnagogic imagery. Sharp waves called vertex spikes appear during stage 1.
