The Olympus LV200 microscope (Fig. 1) has enabled cellular-level analysis of a structure in the hypothalamus of the mammalian brain, called the suprachiasmatic nucleus (SCN). The SCN contains a ...

Circadian rhythms are governed by a master clock, a group of neurons called the suprachiasmatic nucleus, located in a region of the brain called the hypothalamus. This master clock translates cues ...