Fig. 1.

Example neural circuits coopted to serve social functions. (A) Representative brain regions in rhesus macaques whose preexisting functions encompass reward, attention, perception, and executive control. (B) Point of subjective equality (PSE), bias for socially-cued target in terms of foregone juice, after saline or muscimol injections in pSTS. Reproduced from (83) with permission from Oxford University Press. (C) LIP neuron showing firing rate enhancement by observed gaze directed toward the receptive field (RF). (Upper) RF map. (Lower) Neuronal activity as a function of time. Reproduced with permission from ref. 86.