- Sleep and Wakefulness 447
Lateral dorsal
tegmental /
pedunculopontine
nuclei (cholinergic)Dorsal raphe
nuclear group
(serotinergic)Locus
coeruleus
(noradrenergic)Tuberomammillary
nucleus
(histaminergic)Basal forebrain
(cholinergic) Substantia
nigra & ventral
tegmental area
(dopaminergic)DRAWING 25-3 Wakefulness Circuitry