Dynamic changes of somatosensory evoked potentials in rats and humans during wake-sleep states Institute of Cognitive Science, National Cheng Kung University

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    19-Dec-2015

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<ul><li> Slide 1 </li> <li> Dynamic changes of somatosensory evoked potentials in rats and humans during wake-sleep states Institute of Cognitive Science, National Cheng Kung University (Fu-Zen Shaw) </li> <li> Slide 2 </li> <li> Biological rhythm Rhythms are ubiquitous in the mammalian CNS. They also span a broad range of frequencies, from 100 Hz EEG to once per year (0.00000003 Hz) for many seasonal behaviors. They also influence the physiological states (respiratory and cardiac rhythms). The earth is a rhythmic environment. Brains have evolved a variety of systems for rhythmic control. (e.g., waking and sleep, cardiac rhythm, breathing cycle) </li> <li> Slide 3 </li> <li> Slide 4 </li> <li> Slide 5 </li> <li> Slide 6 </li> <li> Brain rhythms Alpha rhythm (8-13 Hz) appears at the occipital cortex when eyes close. [resting condition] {rolandic mu rhythm; temporal tau rhythm} Beta rhythm (13-30 Hz) is associated with alertness. Gamma rhythm (30-80 Hz) is related to sensory integration and feature binding. Theta rhythm (4-8 or 4-10 Hz) Delta rhythm (0.5-4 or 1-4 Hz) Sleep spindle (12-15 Hz or 7-15 Hz) {sigma rhythm} K complex (</li></ul>