Which of the following structure is known as the centre for 'sleep switch'?
Ventro lateral preoptic area in anterior hypothalamus plays a key role in regulation of sleep. It acts as a sleep generating nucleus thus it serves as a centre for sleep switch. Suprachiasmatic nucleus is responsible for the circadian rhythm. Ref: Ganong's Review of Medical Physiology, 23rd Edition, Page 236
Suprachiasmatic nucleus
Ventro lateral preoptic area
Neo coex
Nucleus of tractus solitarius