PSYB64H3 Chapter Notes - Chapter 11: Jet Lag, Master Clock, Seasonal Affective Disorder
6 Dec 2011
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Following adolescence, many temporary owls will revert to their previous state, possibly due to the maturation of neural systems that regulate sleep: regardless of the origins of adolescent owl behavior, accommodations can be useful. Shifting from a 7:15 a. m. start time to an 8:40 a. m. start time improved both attendance and student grades at minnesota high schools (wahlstrom, 2003). Accidents are also highest during these over night shifts: night shift workers are more likely than other workers to develop breast cancer. Shift workers are not only a risk to themselves, but their errors also jeopardize the public. Airline flight attendants who crossed time zones at least once a week for four or more years had reduced reaction times and made 9 percent more mistakes on memory tasks than local crews who did not cross time zones. Internal clocks: the body"s internal master clock is the suprachiasmatic nucleus (scn) in the hypothalamus, the scn is only active during the day.
