
Genes Brain & Behavior, Journal Year: 2023, Volume and Issue: 22(1)
Published: Jan. 13, 2023
Abstract The cholinergic system is a critical regulator of Pavlovian fear learning and extinction. As such, we have begun investigating the system's involvement in individual differences cued extinction using transgenic ChAT::Cre rat model. current study extends behavioral phenotyping line by examining both freezing behavior ultrasonic vocalizations (USVs) during paradigm. Freezing, 22 kHz USVs, 50 USVs were compared between male female ChAT::Cre+ rats their wildtype (Cre‐) littermates learning, contextual cue‐conditioned recall, extinction, generalization to novel tone. During recall froze slightly more than Cre‐ littermates, displayed significant sex freezing, USVs. Females showed males trials, but fewer distress calls recall. also produced exposure testing chambers prior tone (or shock) presentation with males, this effect was blunted females. Corroborating previous studies, overexpressed vesicular acetylcholine transporter immunolabeling basal forebrain, striatum, basolateral amygdala, hippocampus, had similar levels acetylcholinesterase numbers ChAT+ neurons as rats. This suggests that variance dependent advances theories distinct neural circuits processes regulate sexually divergent responses.
Language: Английский