Mat's Psychology Revision

DISRUPTION TO BIOLOGICAL RHYTHMS Jet lag and shift work cause the biological clock and internal physiological systems to be out of balance as our biorhythms are not equipped to cope with these large sudden changes so this has effects on our psychology and behaviour. JET LAG The effects we experience after crossing into a different time zone, our SCN takes several cycles to synchronise/entrain to a new environment.  WINTER et al - Calculated that it takes 1 day to adjust each hour of time change until then we experience symptoms such as fatigue concentration issues, reduced alertness and memory difficulties. EXPLAINING THE EFFECTS OF JETLAG When we're behind time our endogenous pacemakers will STILL release melatonin which makes us sleepy. Our new exogenous zeitgebers are out of sync with our endogenous cycle as i is still light which leads to tiredness and confusion. Takes time for our endogenous cycle to entrain to the new set of ...

BIOLOGICAL RHYTHMS Any change in physiological activity that repeats periodically CIRCADIAN - Lasts 24hrs like the sleep/wake cycle, body temperature, hormones INFRADIAN - Lasts more than 24hrs like menstruation, hibernation and SAD ULTRADIAN - Lasts less than 24hrs like the stages of sleep, feeding  INFRADIAN RHYTHMS (24hrs+) There is a psychological disorder called seasonal affective disorder (SAD) in which sufferers experience depression in only the winter months.  Another example is the mensuration cycle which starts with The follicular phase is between 10-14 days where oestrogen and progesterone levels are low. Endometrium grows and prepares for pregnancy and the size of the eggs triple. Ovulatory phase where oestrogen levels increase and by day 14 the largest egg is released into fallopian tubes ULTRADIAN RHYTHMS (-24hrs) Feeding patterns of animals, and the patterns of human sleep which go through differen...