Ultraviolet Light-Induced Phase Response Curve for the Locomotor Activity Rhythm of the Field Mouse Mus booduga

摘要

Ultraviolet-A (UV-A) light pulses of 2.5 W/m~2 irradiance (at eye level) and 30 mm duration were administered to field mice, Mus booduga (n=84), at 12 circadian phases, each 2h apart, and the resulting phase shifts were measured. These phase shifts were used to construct the UV-A light phase response curve (PRC). Maxi- mum phase delays and maximum phse advances were obtained by ex- posing the animals to UV-A at CT14 (circadian time 14) and at CT20.