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The gradient of luminosity between open/enclosed arms, and not the absolute level of Lux, predicts the behaviour of rats in the plus maze.
Behav Brain Res. 2005 Apr 15; 159(1):55-61.BB

Abstract

The effect of the gradient of luminosity between the open and the enclosed arms (O/E(DeltaLux)) of the elevated plus maze (EPM), upon the level of fear/anxiety in rats submitted to the trial 1/trial 2 paradigm was investigated. Male Wistar rats were assigned to freely explore either of three EPM configuration, with the enclosed arm walls constructed with either translucent glass (O/E(DeltaLux)=11), opaque glass (O/E(DeltaLux)=96) or wood (O/E(DeltaLux)=141), for 2 consecutive days (trial 1/trial 2). Independently of the EPM configuration, rats exhibited increased fear during trial 2 relative to trial 1, thus indicating that the level of O/E(DeltaLux), at least in the range used here, is not a determinant variable for the establishment of increased anxiety induced by prior maze experience. The groups tested under 11 and 141 O/E(DeltaLux) were those who exhibited the low and higher level of open arm avoidance, respectively. There was also an increased open arms avoidance over trial 1 in rats tested under 11 and 96 O/E(DeltaLux), only. These results suggest that the enclosed arm preference of rats during trial 1 EPM procedure may be changed by the level of O/E(DeltaLux) of the test. The present results are discussed with respect to the controversy regarding the role of luminosity on EPM performance.

Authors+Show Affiliations

Pereira LO
Department of Physiological Sciences, Centre of Biological Sciences, Federal University of Santa Catarina, 88.040-900 Florianópolis, SC, Brazil.
da Cunha IC
No affiliation info available
Neto JM
No affiliation info available
Paschoalini MA
No affiliation info available
Faria MS
No affiliation info available

MeSH

Analysis of VarianceAnimalsAnxietyAvoidance LearningDarknessExploratory BehaviorFearLightLightingMaleMaze LearningRatsRats, Wistar

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

15794998

Citation

Pereira, Lenir Orlandi, et al. "The Gradient of Luminosity Between Open/enclosed Arms, and Not the Absolute Level of Lux, Predicts the Behaviour of Rats in the Plus Maze." Behavioural Brain Research, vol. 159, no. 1, 2005, pp. 55-61.
Pereira LO, da Cunha IC, Neto JM, et al. The gradient of luminosity between open/enclosed arms, and not the absolute level of Lux, predicts the behaviour of rats in the plus maze. Behav Brain Res. 2005;159(1):55-61.
Pereira, L. O., da Cunha, I. C., Neto, J. M., Paschoalini, M. A., & Faria, M. S. (2005). The gradient of luminosity between open/enclosed arms, and not the absolute level of Lux, predicts the behaviour of rats in the plus maze. Behavioural Brain Research, 159(1), 55-61.
Pereira LO, et al. The Gradient of Luminosity Between Open/enclosed Arms, and Not the Absolute Level of Lux, Predicts the Behaviour of Rats in the Plus Maze. Behav Brain Res. 2005 Apr 15;159(1):55-61. PubMed PMID: 15794998.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The gradient of luminosity between open/enclosed arms, and not the absolute level of Lux, predicts the behaviour of rats in the plus maze. AU - Pereira,Lenir Orlandi, AU - da Cunha,Isabel Cristina, AU - Neto,José Marino, AU - Paschoalini,Marta Aparecida, AU - Faria,Moacir Serralvo, Y1 - 2004/11/26/ PY - 2004/08/23/received PY - 2004/10/01/revised PY - 2004/10/06/accepted PY - 2005/3/30/pubmed PY - 2005/7/13/medline PY - 2005/3/30/entrez SP - 55 EP - 61 JF - Behavioural brain research JO - Behav Brain Res VL - 159 IS - 1 N2 - The effect of the gradient of luminosity between the open and the enclosed arms (O/E(DeltaLux)) of the elevated plus maze (EPM), upon the level of fear/anxiety in rats submitted to the trial 1/trial 2 paradigm was investigated. Male Wistar rats were assigned to freely explore either of three EPM configuration, with the enclosed arm walls constructed with either translucent glass (O/E(DeltaLux)=11), opaque glass (O/E(DeltaLux)=96) or wood (O/E(DeltaLux)=141), for 2 consecutive days (trial 1/trial 2). Independently of the EPM configuration, rats exhibited increased fear during trial 2 relative to trial 1, thus indicating that the level of O/E(DeltaLux), at least in the range used here, is not a determinant variable for the establishment of increased anxiety induced by prior maze experience. The groups tested under 11 and 141 O/E(DeltaLux) were those who exhibited the low and higher level of open arm avoidance, respectively. There was also an increased open arms avoidance over trial 1 in rats tested under 11 and 96 O/E(DeltaLux), only. These results suggest that the enclosed arm preference of rats during trial 1 EPM procedure may be changed by the level of O/E(DeltaLux) of the test. The present results are discussed with respect to the controversy regarding the role of luminosity on EPM performance. SN - 0166-4328 UR - https://www.unboundmedicine.com/medline/citation/15794998/The_gradient_of_luminosity_between_open/enclosed_arms_and_not_the_absolute_level_of_Lux_predicts_the_behaviour_of_rats_in_the_plus_maze_ DB - PRIME DP - Unbound Medicine ER -