INVESTIGADORES
RUETTI Eliana Martha
artículos
Título:
Effects of pretraining treatment with testosterone on successive and anticipatory negative contrast
Autor/es:
JUSTEL, N. R.; RUETTI, E. M.; MUSTACA, A. E.; PAPINI, M. R.
Revista:
PHYSIOLOGY AND BEHAVIOR
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 105 p. 933 - 937
ISSN:
0031-9384
Resumen:
Previous research indicated that the suppression of consummatory behavior that follows incentive downshift
in male rats is attenuated by testosterone (T) administration during training. The present experiments were
designed to assess the role of pretraining T administration on two incentive contrast situations in consummatory
behavior: successive negative contrast (cSNC) and anticipatory negative contrast (cANC). In cSNC
(Experiment 1), a downshift from 32% to 4% sucrose leads to behavioral suppression relative to an unshifted,
4% sucrose condition (the cSNC effect). Pretraining T administration enhanced consummatory behavior directed
at 4% sucrose, without affecting behavior directed at 32% sucrose. This effect obscured a reduction in the cSNC
effect by the T treatment that was only detected when a proportional measure of behavior was used. In cANC
(Experiment 2), groups received access to two bottles per day separated by a short midtrial interval. Consumption
of 4% sucrose is suppressed when the second bottle offers 32% sucrose, relative to 4% sucrose (the cANC
effect). Pretraining T did not affect the cANC effect, known to be insensitive to treatment with anxiolytics.
These results suggest an anxiolytic-like effect of testosterone in adjustment to incentive downshifts.