Siberian hamsters also form a memory for the rate of change of a particular light-dark cycle to which they are entrained. Note here that activity onset precedes the light-dark edge by a large phase angle. (D) Entrainment to a cycle followed by 1 day of memory. (C) Entrainment to an cycle followed by 1 day of memory. (B) Entrainment to a cycle followed by ∼2 days of memory. (A) Entrainment to a light-dark cycle followed by ∼2 days of memory. Linear least-square fits to activity onset are used to quantify the number of days of memory an animal retains for a particular cycle. The animal is first entrained to a particular cycle, which is followed by constant darkness. Black bars indicate running-wheel activity the gray region shows the duration of the light period as the day number increases from top to bottom. The actogram is repeated with pairs of days plotted side by side. Shown are running-wheel actograms for these nocturnal mammals, whose activity normally starts at lights off.
Ospeck, Ben Coffey, Dave Freeman Biophysical Journal Volume 97, Issue 6, Pages (September 2009) DOI: /j.bpj Copyright © 2009 Biophysical Society Terms and ConditionsĢ Figure 1 Siberian hamsters form a memory for the particular light-dark cycle to which they are entrained. Presentation on theme: "Light-Dark Cycle Memory in the Mammalian Suprachiasmatic Nucleus"- Presentation transcript:ġ Light-Dark Cycle Memory in the Mammalian Suprachiasmatic Nucleus
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