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Neuronal circuitry involved in responses to amphetamines. A: actual anatomic structures. B: simplified conceptual network. Lines with arrows, excitatory projections (source is white); lines with circles, inhibitory projections (source is gray). MPOA, medial preoptic area; vlPAG and dlPAG, ventrolateral and dorsolateral periaqueductal gray; RVLM, rostral ventrolateral medulla; DMH, dorsomedial hypothalamus; RP, raphe pallidus; SC, superior colliculus.
