PSYC 1010 Chapter Notes - Chapter 5: Melatonin, Shift Work, Sleep Deprivation

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Jennifer Steeves

Document Summary

Biological rhythms relation to sleep: circadian (~24-hour) rhythms are influential in the regulation of sleep and temperature. Infradian (< once/day, < 1 year) rhythms are influential in menstruation and egg- laying in fish. Circannual (~1 year) rhythms are influential in regulating migration and hibernation: ultradian (<1/day) rhythms influential in regulating heartbeat, respiration, cycles w/i sleep. Internal biological clocks are reset by exposure to light stimulates scn signals pineal gland to secrete melatonin: poor sleep associated with jet lag and rotating shift work is due to being out of sync with. Administration of melatonin and exposure to bright light appear may help realign them. The architecture of sleep: electroencephalogram (eeg) measures voltage diff. between any 2 points on the scalp. Specific wave forms are reliably associated with specific states. Irregular high-frequency noise each neuron is doing its own thing. Regular low-frequency noise neurons are doing things in synchrony: different waves characterize different stages. Alpha waves awake but non-attentive; unsynchronized activity.