Figure 4.

Activities of units recorded in the dPAG during awake-rat, anesthetized-rat, habituation, and toy sessions. A, Top, Activities of dPAG units recorded during awake-rat sessions, with each row corresponding to one unit and color scale indicating normalized firing activity. Units were sorted by time of peak firing rate for each unit. Bottom, Normalized average PETH of dPAG units. Inset, Pie plot showing population distribution (flight-specific units, 22%; risk assessment-specific units, 10%; units exhibiting both features, 2%). B–D, Top, Normalized activities of dPAG units recorded during anesthetized-rat (B), habituation (C), and toy (D) sessions. Bottom, Normalized average PETH of dPAG units recorded during each session.