PSY397H1 Lecture Notes - Rainbow Trout, Desert Iguana, Phase Angle
Document Summary
Circadian rhythms are good at determining seasonality: used to capture birds sparrow (doesn"t migrate all the time) If you know where they are, then you can capture them at night. In the daytime you have them hopping around. Arnold did an number of experiements taking a look at the eyes: looking for clock in the eyes in birds: only obvious photoreceptors, looked at lateral eyes. Photoreceptors in the eyes, clock in the brain (disconnected from entraining center) Slide 6 sue gaston looked at anatomy of the bird. There is only one thing on the top of the head that could possibility have something to do with photoreceptors. Animals already free running in the dark, become arrhythmic. Slide 8 top: animals free running in the dark and put them in the light again. Found they still synchronize with the light cycle even though they were arrhythmic in the dark. Maybe there is another osciallator that can synchronize with the light cycle.
