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Delayed development of conditioned heart rate responses to auditory stimuli in the rat.
Dev Psychobiol. 1995 May; 28(4):221-38.DP

Abstract

This study examined heart rate responses to an auditory conditioned stimulus during development in the rat. The unconditioned stimulus (US) in all experiments was an acoustic startle stimulus. The conditioned stimulus elicited a monophasic bradycardia in animals 21 days of age and older, but no response in younger animals. These results are strikingly similar to an earlier study that used shock as the US (Campbell & Ampuero, 1985). Further, the conditioned cardiac response in adults was found to be mediated entirely through activation of the parasympathetic division of the autonomic nervous system (ANS) even though the US unconditionally activates the sympathetic system at that age. The delayed development of several different forms of conditioned fear is discussed.

Authors+Show Affiliations

Department of Psychology, School of New South Wales, Kensington, Australia.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

7621985

Citation

Richardson, R, et al. "Delayed Development of Conditioned Heart Rate Responses to Auditory Stimuli in the Rat." Developmental Psychobiology, vol. 28, no. 4, 1995, pp. 221-38.
Richardson R, Wang P, Campbell BA. Delayed development of conditioned heart rate responses to auditory stimuli in the rat. Dev Psychobiol. 1995;28(4):221-38.
Richardson, R., Wang, P., & Campbell, B. A. (1995). Delayed development of conditioned heart rate responses to auditory stimuli in the rat. Developmental Psychobiology, 28(4), 221-38.
Richardson R, Wang P, Campbell BA. Delayed Development of Conditioned Heart Rate Responses to Auditory Stimuli in the Rat. Dev Psychobiol. 1995;28(4):221-38. PubMed PMID: 7621985.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Delayed development of conditioned heart rate responses to auditory stimuli in the rat. AU - Richardson,R, AU - Wang,P, AU - Campbell,B A, PY - 1995/5/1/pubmed PY - 1995/5/1/medline PY - 1995/5/1/entrez SP - 221 EP - 38 JF - Developmental psychobiology JO - Dev Psychobiol VL - 28 IS - 4 N2 - This study examined heart rate responses to an auditory conditioned stimulus during development in the rat. The unconditioned stimulus (US) in all experiments was an acoustic startle stimulus. The conditioned stimulus elicited a monophasic bradycardia in animals 21 days of age and older, but no response in younger animals. These results are strikingly similar to an earlier study that used shock as the US (Campbell & Ampuero, 1985). Further, the conditioned cardiac response in adults was found to be mediated entirely through activation of the parasympathetic division of the autonomic nervous system (ANS) even though the US unconditionally activates the sympathetic system at that age. The delayed development of several different forms of conditioned fear is discussed. SN - 0012-1630 UR - https://www.unboundmedicine.com/medline/citation/7621985/Delayed_development_of_conditioned_heart_rate_responses_to_auditory_stimuli_in_the_rat_ L2 - https://doi.org/10.1002/dev.420280404 DB - PRIME DP - Unbound Medicine ER -