PS101 Chapter Notes -Nicotine, Premenstrual Syndrome, Lucid Dream
Document Summary
A periodic, more or less regular fluctuation in a biological system. Rhythms can be synchronized with external (entrainment) or internal (endogenous) cues. Biological rhythms influence effectiveness of medication, alertness, and job performance. Removed from cues about 10% of people have clocks running slower and. Increase in accidents at transition to daylight savings time. Controlled by biological clock in suprachiasmatic nucleus (scn) Regulates levels of melatonin secreted by pineal gland. A state in which biological rhythms are not in phase (synchronized) with one another. Changes in your normal routines can cause desynchronization. May also occur in response to jet lag, rotating shift work, daylight savings time http://www. youtube. com/watch?v=-ygvt7g1dls http://www. youtube. com/watch?v=sutyas3ga0a. Seasonal affective disorder (sad) not a form of desynchronization. A disorder in which a person experiences depression during the winter and an improvement of mood in the spring. Treatments may involve photography or exposure to fluorescent light. Inconsistent findings with respect to prevalence (2-20%) and effectiveness or treatments.
