The dorsal and ventral periaqueductal gray (dPAG and vPAG, respectively) are embedded in distinct survival networks that coordinate, respectively, innate and conditioned fear-evoked freezing. However, the information encoded by the PAG during these survival behaviors is poorly understood. Recordings in the dPAG and vPAG in rats revealed differences in… (More)
Figure 4. Different types of response of units in PAG. Shown are examples of the different patterns of response to the CS during EE (tone block 1, gray horizontal bar CS, conditioned stimulus). A, Type 1, increasedfiring. B,Type2,nosignificantchangeinfiring. C,Type3,biphasicresponse. D,Type4,decreasedfiring.Examples in A and C wereunits locatedinthedPAGandexamples in B and D wereunits locatedinthevPAG.