How_Do_We_Sleep3 - How Do We Sleep? Rhythms of Life Week 10...

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HD 220 Fall 2006 1 Temple 2006 1 How Do We Sleep? Rhythms of Life Week 10 Temple 2006 2 Rhythms of Life • Biological rhythms – Biological clocks – Clinical Disorder: Seasonal Affective Disorder – Neural basis for biological clocks • Rhythms of sleep – Methods to study sleep – Sleep stages • NREM sleep • REM sleep • Dreams Temple 2006 3 Biological Rhythms
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HD 220 Fall 2006 2 Temple 2006 4 Biological clocks IMPORTANT NOTE: THE BOOK IS WRONG! HAS ULTRADIAN AND INFRADIAN REVERSED Temple 2006 5 Measuring Daily Rhythms Temple 2006 6 Free Running Rhythms No day / night cues
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HD 220 Fall 2006 3 Temple 2006 7 Free Running Rhythms Temple 2006 8 Zeitgebers • Zeitgebers – An environmental event that entrains biological rhythms • Sets the clock • Light is potent stimulus for setting biological clock – Entrainment works best if adjustment to clock is not large Temple 2006 9 Jet Lag
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HD 220 Fall 2006 4 Temple 2006 10 Clinical Disorder: Seasonal Affective Disorder • SAD – Depression during winter months • Worse in extreme latitudes – Hypothesis • Not enough light to entrain circadian rhythm • Person’s rhythm becomes free running – Rhythm may become disrupted such that feel sleep deprived • Treatment – Entrain the circadian rhythm » Expose person to light at specific periods
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This note was uploaded on 09/28/2008 for the course HD 220 taught by Professor Anon during the Fall '06 term at Cornell University (Engineering School).

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How_Do_We_Sleep3 - How Do We Sleep? Rhythms of Life Week 10...

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