Class Notes (836,147)
Canada (509,656)
Psychology (2,794)
PS101 (736)

PS101 Chapter 5

3 Pages
Unlock Document

Lawrence Murphy

Chapter 5 nd October 22 , 2012 Body Rhythms and Mental States - Biological rhythms: the tides of experience - Rhythms of sleep - Exploring the dream world - The Riddle of Hypnosis - Consciousness-altering drugs Biological Rhythms - We spend a third of our life sleeping; doing something we don’t know why we do it - Biological Rhythms: a periodic, more or less regular fluctuation in a biological system - External cues(entrainment) and Internal cues (endogenous) - Biological rhythms influence effectiveness of medication, alertness, job performance – ex. more productive in the morning then you are at night (sometimes it has to do with caffeine, but on its own, it affects a variety of things) Circadian rhythm - Every 24 hours cycle, sleep wake cycle - commonly entertained to external time cues (ex. rising/setting of the sun) - endogenous rhythm averages around 24.3 hours (alarm clock or mother yelling at you to wake up) - removed cues about 10% of people have clocks running slower and 10% running faster - increase in accidents at transition of Daylight Savings Time – 10-20% more accidents - controlled by biological clock in suprachiasmatic nucleus (SNC)- regulates levels of melatonin secreted by pineal gland – ex. if you fly to austrailia you should have melatonin to adapt better to the time difference and jet lag Out of Sync? - Internal desynchronization - a state in which biological rhythms are not in phase (synchronized) with one another - changed in your normal routines can cause desyncronization (ex. midterm time when you stay up so late, or eat different things from normal) - may also occur in response to jet lag, rotating shift work, daylight savings time - ----youtube videos----- - Desynchronization is NOT a form of seasonal affective disorder Moods and Long-term Rhythms - Seasonal Affective Disorder (SAD) - a disorder in which a person experiences depression during the winter and an improvement of mood in the spring --Ex. inside too long don’t get light= impacts us - treatments may involve phototherapy or exposure to fluorescent light - inconsistent findings with respect to prevalence (2-20%) and effectiveness of treatments Moods and Menstrual Cycles - Premenstrual syndrome (PMS) - vague cluster of physical and emotional symptoms associated with the days preceding menstruation that was labeled as an illness - physical symptoms (ex. cramps, water retention) are common - emotional symptoms (ex. irritability, depression) are rare Moods, PMS and Research - Estimates of prevalence range from 13% to ‘most women’ - Expectations and beliefs may be related to PMS symptom reporting – young women are expecting to be irritable/frustrated because that’s what’s ‘supposed to happen’; kind of like a placebo - Evidence supports that women often experience physical symptoms, but the emotional symptoms are more difficult to say whether it does happen or not The Rhythms of Sleep - During sleep, we cycle between periods of REM and non-REM sleep (90 minutes) - Rapid eye movement (REM)- characterized by eye movement, loss of muscle tone and dreaming - Non-Rem sleep (NREM)- characterized by fewer eye
More Less

Related notes for PS101

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.