Amita Sehgal, PhD, a professor of Neuroscience at the Perelman School of Medicine, University of Pennsylvania, describes in Cell a circuit in the brain of fruit flies that controls their daily, rhythmic behavior of rest and activity. (sciencedaily.com)
They found that cells in the pars intercerebralis (PI) are essential for rhythmic behavior, and PI cells are connected to the clock cells through a circuit of at least two synapses. (sciencedaily.com)
In a rhythmic light - dark environment, gene expression analysis revealed that both groups displayed rhythmic behavior, glucocorticoid hormone rhythms and clock gene expression rhythms in peripheral tissues such as liver or adrenal. (sciencedaily.com)