{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T02:28:09Z","timestamp":1783736889895,"version":"3.55.0"},"reference-count":71,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2024,2,16]],"date-time":"2024-02-16T00:00:00Z","timestamp":1708041600000},"content-version":"unspecified","delay-in-days":46,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-sa\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Personality Neuroscience"],"published-print":{"date-parts":[[2024]]},"abstract":"<jats:title>Abstract<\/jats:title>\n\t  <jats:p>Despite being one of the main components of anxiety and playing a pivotal role in how an individual perceives and copes with anxiogenic situations or responds to a given treatment, trait anxiety is paradoxically omitted in most animal models of anxiety. This is problematic and particularly more concerning in models that are used to screen drugs and other treatments for specific anxiety disorders and to investigate their neurobiological mechanisms. Our group has been engaged in the search for specific anxiety-related traits in animal models of anxiety. We developed two new lines of rats with strong phenotypic divergence for high (Carioca High-conditioned Freezing [CHF]) and low (Carioca Low-conditioned Freezing [CLF]) trait anxiety as expressed in the contextual fear conditioning paradigm. Here, we summarize key behavioral, pharmacological, physiological, and neurobiological differences in one these lines, the CHF rat line, relative to randomized-cross controls and discuss how far they represent a valid and reliable animal model of generalized anxiety disorder and so high trait anxiety.<\/jats:p>","DOI":"10.1017\/pen.2023.6","type":"journal-article","created":{"date-parts":[[2024,2,16]],"date-time":"2024-02-16T09:34:17Z","timestamp":1708076057000},"source":"Crossref","is-referenced-by-count":10,"title":["An animal model of trait anxiety: Carioca high freezing rats as a model of generalized anxiety disorder"],"prefix":"10.1017","volume":"7","author":[{"given":"Antonio Pedro Mello","family":"Cruz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vitor","family":"Castro-Gomes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8395-8008","authenticated-orcid":false,"given":"J.","family":"Landeira-Fernandez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2024,2,16]]},"reference":[{"key":"S2513988623000068_ref44","doi-asserted-by":"crossref","DOI":"10.2174\/1570159X20666221012121534","article-title":"Pharmacological and physiological correlates of the bidirectional fear phenotype of the Carioca rats and other bidirectionally selected lines","volume":"21","author":"Lages","year":"2023","journal-title":"Current 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