PS101 Chapter Notes - Chapter 5: Shift Work, Job Performance, Daylight Saving Time
Document Summary
Rhythms can be synchronized w/ external (entrainment) or internal (endogenous) cues. Biological rhythms influence effectiveness of medication, alertness, job performance. Occur approx every 24 hours (i. e. sleep-wake cycle) Removed from cues about 10% of people have clocks running slower and 10% running faster. Increase in traffic accidents at transition to daylight savings time. Controlled by biological clock in suprachiasmatic nucleus (scn) Regulates levels of melatonin secreted by pineal gland. State where biological rhythms aren"t in phase (in sync) with one another. Change in normal routine can cause desynchronization. Can also be response to jet lag, rotating shift work, daylight savings time. Inconsistent findings with respect to prevalence (2 - 20%) and effectiveness of treatments.
