Acoustic startle response , pre - pulse inhibition (PPI) and Crhr2 expression for wild - type (WT) and Nes - Cre:Errβlox/loxmice. a) The force elicited by the acoustic startle response was measured from WT and Nes-Cre:Errβlox/lox mice after pre-pulse inhibition over five different acoustic intensities (74, 78, 82, 86, and 90 dB). b) Crh and c) Crhr2 levels were decreased in the hindbrain of Nes-Cre:Errβlox/lox mice, relative to WT. Data shown are mean ± SEM for each group. *P < 0.05.