Rats with congenital learned helplessness respond less to sucrose but show no deficits in activity or learning

Vollmayr, B., Bachteler, D., Vengeliene, V., Gass, P., Spanagel, R., Henn, F. (April 2004) Rats with congenital learned helplessness respond less to sucrose but show no deficits in activity or learning. Behav Brain Res, 150 (1-2). pp. 217-21. ISSN 0166-4328 (Print)0166-4328 (Linking)

URL: http://www.ncbi.nlm.nih.gov/pubmed/15033295
DOI: 10.1016/s0166-4328(03)00259-6

Abstract

Inbred rat strains for congenital learned helplessness (cLH) and for congenital resistance to learned helplessness (cNLH) were investigated as a model to study genetic predisposition to major depression. Congenitally helpless rats respond less to sucrose under a progressive ratio schedule. This is not confounded by locomotor hypoactivity: in contrast, cLH rats show a slight hyperactivity during the first 5 min of an open field test. cLH rats acquire operant responding to sucrose as readily as cNLH rats and exhibit normal memory acquisition and retrieval in the Morris water maze, thus ruling out general learning deficits as the cause of the decreased response to sucrose. Reduced total responses and reduced breaking points for sucrose in the cLH strain argue for anhedonia, which is an analogue to loss of pleasure essential for the diagnosis of major depressive episodes, and thus confirm the validity of congenitally learned helpless rats as a model of major depression.

Item Type: Paper
Uncontrolled Keywords: Animals Conditioning, Operant/drug effects/ physiology Female Helplessness, Learned Learning/ physiology Male Maze Learning/physiology Motor Activity/ physiology Rats Rats, Sprague-Dawley Reinforcement Schedule Reward Sucrose
Subjects: diseases & disorders
diseases & disorders > mental disorders
diseases & disorders > mental disorders > mood disorders
organism description > animal
organism description > animal behavior
diseases & disorders > mental disorders > mood disorders > depression
organism description > model organism
organism description > animal > mammal > rodent > rat
organism description > animal > mammal > rodent > rat
CSHL Authors:
Communities: CSHL labs > Henn lab
Depositing User: Matt Covey
Date: 2 April 2004
Date Deposited: 04 Mar 2013 21:27
Last Modified: 04 Mar 2013 21:27
Related URLs:
URI: http://repository.cshl.edu/id/eprint/27698

Actions (login required)

Administrator's edit/view item Administrator's edit/view item
CSHL HomeAbout CSHLResearchEducationNews & FeaturesCampus & Public EventsCareersGiving