The Influence of Circadian Timing on Olfactory Sensitivity.

摘要: Olfactory sensitivity has traditionally been viewed as a trait that varies according to individual differences but is not expected change with one's momentary state. Recent research begun challenge this position and time of day shown alter detection levels. Links between obesity the timing food intake further raise issue whether odor may vary function circadian processes. To investigate question, 37 (21 male) adolescents (M age = 13.7 years) took part in 28-h forced desynchrony (FD) protocol 17.5 h awake 10.5 sleep, for 7 FD cycles. Odor threshold was measured using Sniffin' Sticks 6 times each cycle (total tests 42). Circadian phase determined by intrinsic period derived from dim light melatonin onsets. showed significant effect phase, lowest occurring on average slightly after onset production, or about 1.5○ (approximately 21:08 h). Considerable variability observed, however, peak olfactory acuity never occurred 80.5○ 197.5○ (~02:22-10:10 These data are first show differentially consistently influenced timing, stable trait. Potential biological relevance connections discussed.