we measured gu during the light ( 1400 hours ) and the dark ( 2200 hours ) in 17 anatomical regions including the following hypothalamic areas : medial preoptic nucleus , suprachiasmatic preoptic nucleus , suprachiasmatic nucleus , paraventricular nucleus , arcuate nucleus , and median eminence .
C0020663
hypothalamic
C0038866
suprachiasmatic nucleus