PSYCH 202 Lecture Notes - Lecture 21: Slow-Wave Sleep, Circadian Rhythm, Dendritic Spine
Document Summary
Ionotropic glutamate receptors: nmda receptors, glutamate and glycine can bind, one of the two kinds of receptors activated by glutamate. Ltp review: magnesium block in nmda receptor, but it gets kicked out when the postsynaptic neuron becomes depolarized as ampa receptors let in sodium ions. Calcium inserts additional ampa receptors in the membrane, sends a message to the presynaptic cell to release more glutamate, strengthens connection with dendritic spine (creates more), and also speeds up process of ampa receptors. Stages: arousal, slow-wave activity, rem sleep, electroencephalogram (eeg, measures brain waves, records electrical activity from the surface of the head, electromyogram (emg, measures muscle activity, electro-oculogram (eog, monitors eye movements. Wakefulness: alpha waves, regular, medium frequency, typical of resting, before sleep starts, meditation, medium amplitude, beta waves. Irregular, low amplitude, typical of alertness and active thinking, super focused on something: different brain regions processing different information because the neuron firings cancel each other out.
