Circannual

The real answer lies in circadian and circannual rhythmicity, chronobiology, evolution vs. modern life. ❋ Unknown (2010)

If I remember correctly, your posts were primarily about the various rhythms (circadian, circannual, etc.), which is interesting, but is really at a much lower level (early perceptual, pre-cortical, and very primitive) than what I usually deal with, or know much about. ❋ Chris (2004)

The only well developed visual domains are those involved in controlling the circadian and circannual biological rhythms - the suprachiasmatic nucleus and the retinohypothalamic projections. ❋ Ondřej Kott Et Al. (2010)

The reindeer use those few weeks of spring (and fall) to measure daylength (photoperiod) and thus time their seasonality - or in other words, to reset their internal calendar: the circannual clock. ❋ Coturnix [email protected] (2010)

Controls circadian and circannual rhythms by stimulation of the brain - possibly involved in the maturation of sexual organs ❋ Unknown (2009)