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Stress inhibits psychomotor performance differently in simple and complex open field environments

Faraji, J. and Soltanpour, N. and Jafari, S.Y. and Moeeini, R. and Pakdel, S. and Moharreri, A. and Metz, G.A.S. (2014) Stress inhibits psychomotor performance differently in simple and complex open field environments. Hormones and Behavior, 65 (1). pp. 66-75.

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Abstract

Stress affects psychomotor profiles and exploratory behavior in response to environmental features. Here we investigated psychomotor and exploratory patterns induced by stress in a simple open-field arena and a complex, multi-featured environment. Groups of rats underwent seven days of restraint stress or no-stress conditions and were individually tested in three versions of the ziggurat task (ZT) that varied according to environmental complexity. The hyperactivity of the hypothalamic-pituitary-adrenal (HPA) axis due to stress procedure was evaluated by the pre- and post-stress levels of circulating corticosterone (CORT). Horizontal activity, exploration, and motivation were measured by the number of fields entered, the time spent in the central fields, path length and speed, and stop duration. In addition, vertical exploratory behavior was measured by the times rats climbed onto ziggurats. Stress-induced psychomotor changes were indicated by reduced path length and path speed and increased duration of stops only within the complex arena of the ZT. Rats in stress groups also showed a significant decline in the vertical movements as measured by the number of climbing onto ziggurats. No stress-induced changes were revealed by the simple open-field arena. The exploratory patterns of stressed animals suggest psychomotor inhibition and reduced novelty-seeking behaviors in an environment-dependent manner. Thus, multi-featured arenas that require complex behavioral strategies are ideally suited to reveal the inhibitory effects of stress on psychomotor capabilities in rodents. © 2013 Elsevier Inc.

Item Type: Article
Additional Information: cited By 3
Uncontrolled Keywords: corticosterone, adult; animal behavior; animal experiment; article; controlled study; corticosterone blood level; environmental factor; exploratory behavior; high risk behavior; hypothalamus hypophysis adrenal system; immobilization stress; locomotion; male; motivation; nonhuman; open field behavior; priority journal; psychomotor performance; rat, Corticosterone; Environment; Exploration; Motor behavior; Novelty-seeking; Open field; Restraint stress; Ziggurat task, Animals; Environment; Exploratory Behavior; Hydrocortisone; Male; Motivation; Motor Activity; Psychomotor Performance; Rats; Rats, Long-Evans; Restraint, Physical; Stress, Psychological
Subjects: مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 13 Aug 2017 03:05
Last Modified: 13 Aug 2017 03:05
URI: http://eprints.goums.ac.ir/id/eprint/9353

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