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Abstract:

A mild electrical shock delivered to the walking legs of the crab Chasmagnathus granulatus through a fine layer of sea water, induces a running response that declines after repeated stimulation. Herein, a first series of experiments was aimed at conditioning the response to a light or a dark pulse, but no detectable CR was disclosed during training nor in a later test with the CS alone, even though several stimulus parameters were assayed. In a second series, crabs were repeatedly exposed during training to a light pulse (CS) immediately followed by shock (UCS), and after a 6-h rest interval, tested with either CS-UCS or UCS. The CS-UCS presentation at testing elicited a higher recovery (potentiated recovery, circa 70%) than that evoked by the UCS alone (unconditioned recovery, circa 35%) (Experiment 3). An experiment including the explicity unpaired control procedure (Experiment 4), confirmed that the enhanced response (CR) to the shock (UCS) (measured as potentiated recovery) is conditioned to an illumination signal (CS). An alternative explanation of the potentiated recovery in terms of retardation of habituation proved hardly tenable (Experiment 5). In Experiment 6, crabs were exposed to a variety of light pulse shock and dark pulse shock temporal relationships, and results were found consistent with a delay of reinforcement gradient when light termination was considered as CS. Thus a decrease in luminance is able to become associated with shock and to condition an enhanced response regardless of light termination being the offset of a light pulse or the onset of a dark pulse. Accordingly, potentiated recovery was shown when the shock at test trial was immediately preceded both by a short light pulse and by the end of a long period of illumination (Experiment 7). © 1991.

Registro:

Documento: Artículo
Título:Conditioned facilitatory modulation of the response to an aversive stimulus in the crab Chasmagnathus
Autor:Hermitte, G.; Maldonado, H.
Filiación:Laboratorio de Fisiologia, Comportamiento Animal Facultad de Ciencias Exactas y Naturales UBA, Buenos Aires, Argentina
Palabras clave:Conditioned fear; Conditioned modulatory; Crustacea; Habituation; Pavlovian conditioning; animal experiment; article; conditioning; controlled study; crab; habituation; learning; male; nonhuman; priority journal; Animal; Arousal; Association Learning; Avoidance Learning; Brachyura; Conditioning, Classical; Electroshock; Escape Reaction; Habituation (Psychophysiology); Mental Recall; Nervous System Physiology; Photic Stimulation; Receptors, Opioid; Support, Non-U.S. Gov't
Año:1992
Volumen:51
Número:1
Página de inicio:17
Página de fin:25
DOI: http://dx.doi.org/10.1016/0031-9384(92)90199-C
Título revista:Physiology and Behavior
Título revista abreviado:Physiol. Behav.
ISSN:00319384
CODEN:PHBHA
CAS:Receptors, Opioid
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319384_v51_n1_p17_Hermitte

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Citas:

---------- APA ----------
Hermitte, G. & Maldonado, H. (1992) . Conditioned facilitatory modulation of the response to an aversive stimulus in the crab Chasmagnathus. Physiology and Behavior, 51(1), 17-25.
http://dx.doi.org/10.1016/0031-9384(92)90199-C
---------- CHICAGO ----------
Hermitte, G., Maldonado, H. "Conditioned facilitatory modulation of the response to an aversive stimulus in the crab Chasmagnathus" . Physiology and Behavior 51, no. 1 (1992) : 17-25.
http://dx.doi.org/10.1016/0031-9384(92)90199-C
---------- MLA ----------
Hermitte, G., Maldonado, H. "Conditioned facilitatory modulation of the response to an aversive stimulus in the crab Chasmagnathus" . Physiology and Behavior, vol. 51, no. 1, 1992, pp. 17-25.
http://dx.doi.org/10.1016/0031-9384(92)90199-C
---------- VANCOUVER ----------
Hermitte, G., Maldonado, H. Conditioned facilitatory modulation of the response to an aversive stimulus in the crab Chasmagnathus. Physiol. Behav. 1992;51(1):17-25.
http://dx.doi.org/10.1016/0031-9384(92)90199-C