Anterior cingulate cortex regulates pain catastrophizing-like behaviors in rats.

ABSTRACT: Negative pain expectation including pain catastrophizing is a well-known clinical phenomenon whereby patients amplify the aversive value of a painful or oftentimes even a similar, non-painful stimulus. Mechanisms of pain catastrophizing, however, remain elusive. Here, we modeled pain catastrophizing behavior in rats, and found that rats subjected to repeated noxious pin pricks on one paw demonstrated an aversive response to similar but non-noxious mechanical stimuli delivered to the contralateral paw. Optogenetic inhibition of pyramidal neuron activity in the anterior cingulate cortex (ACC) during the application of repetitive noxious pin pricks eliminated this catastrophizing behavior. Time-lapse calcium (Ca²⁺) imaging in the ACC further revealed an increase in spontaneous neur

SUBMITTER: Jee HJ 

PROVIDER: S-EPMC10576271 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature