Neuroanatomy Draw It To Know It

25. Sleep and Wakefulness 449

Ventrolateral preoptic

& median preoptic

hypothalamus

(Sleep center)

Perifornical

lateral

hypothalamic

area (orexigenic)

Wake-promoting cells

Sleep Wake

Ventrolateral preoptic

& median preoptic

hypothalamus

(Sleep center)

Perifornical

lateral

hypothalamic

area (orexigenic)

Wake-promoting cells

Sleep Wake

DRAWING 25-4 Flip-Flop Switch