Psychology 2011A/B Chapter Notes - Chapter 3: Slow-Wave Sleep, Non-Rapid Eye Movement Sleep, Rapid Eye Movement Sleep

• School: Western University
• Department: Psychology
• Course: Psychology 2011A/B
• Professor: Imants Baruss

Document Summary

Messages along neurons care actually changes in the electrical potentials across the cells" walls created through electrochemical processes. Neurotransmitters chemicals released into the intercellular fluid for communication between nerve cells. Lilly tested this by climbing into an isolation tank. Found out that removal of almost all sensory stimulation did not cause sleep. Yes, some voltage changes can be measured, measured by electrodes on various parts of the scalp which detect changes in electrical potential across the dendritic membranes: electroencephalograph (eeg) observes electrical potential over time. Primary instrument that has been used for defining the physiological changes associated with sleep. Beta waves 13+ cycles per second (cps) Alpha waves 8 to 13 cps. Theta waves 4 to 7 cps. In waking state, eeg reveals beta activity with some mixed alpha activity and. Eog shows rapid eye movements and eye blinks, and the emg indicates high levels of muscle activity.