Sleep can be induced at any time of day or night, but its occurrence is normally controlled by the circadian clock located in the suprachiasmatic nucleus, such that diurnal animals sleep mostly at night.
(Sleep; can be induced; T:at any time of day or night) (its occurrence; is normally controlled; by the circadian clock) (the circadian clock; located; L:in the suprachiasmatic nucleus) (diurnal animals; sleep mostly; T:at night)
Sleep its occurrence the circadian clock diurnal animals
can be induced is normally controlled located sleep mostly
T:at any time of day or night
by the circadian clock
L:in the suprachiasmatic nucleus
T:at night