Autonomic reactivity in blood-injection-injury and snake phobia.

Autor: Sánchez-Navarro JP; Department of Human Anatomy and Psychobiology, School of Psychology, University of Murcia, Murcia 30100, Spain; Institute of Biomedical Research of Murcia (IMIB-Arrixaca), Spain. Electronic address: jpedro@um.es., Martínez-Selva JM; Department of Human Anatomy and Psychobiology, School of Psychology, University of Murcia, Murcia 30100, Spain; Institute of Biomedical Research of Murcia (IMIB-Arrixaca), Spain., Maldonado EF; AndaluciaTECH,, School of Psychology, University of Malaga, Malaga, Spain., Carrillo-Verdejo E; Department of Human Anatomy and Psychobiology, School of Psychology, University of Murcia, Murcia 30100, Spain; Institute of Biomedical Research of Murcia (IMIB-Arrixaca), Spain., Pineda S; Department of Human Anatomy and Psychobiology, School of Psychology, University of Murcia, Murcia 30100, Spain; Hospital General Universitario Morales Meseguer, Murcia, Spain., Torrente G; Department of Human Anatomy and Psychobiology, School of Psychology, University of Murcia, Murcia 30100, Spain; Institute of Biomedical Research of Murcia (IMIB-Arrixaca), Spain.
Jazyk: angličtina
Zdroj: Journal of psychosomatic research [J Psychosom Res] 2018 Dec; Vol. 115, pp. 117-124. Date of Electronic Publication: 2018 Oct 31.
DOI: 10.1016/j.jpsychores.2018.10.018
Abstrakt: Objective: This research aimed to study the salivary flow and other autonomic reactions -heart rate (HR) and skin conductance response (SCR)- in blood-injection-injury (BII) phobia and snake phobia participants, under the assumption that exposure to blood-related pictures in BII phobia will provoke an increase in parasympathetic activity that, in turn, will lead to a greater saliva production than other affective contents.
Methods: We selected 18 BII phobia and 14 snake phobia participants along with 22 non-phobia individuals. All participants were exposed to 3 blocks of pictures (12 pictures per block) depicting either mutilations, snakes or neutral, household objects. Saliva samples were taken in the 2-min interval before and after each block.
Results: In comparison to other contents, blood-related pictures provoked an increase in salivary flow in BII phobia participants, as well as an increase in the number of SCRs. In the snake phobia group, snake pictures provoked HR acceleration, but the SCRs they elicited did not differ from the SCRs provoked by the blood-related pictures.
Conclusion: BII phobia individuals react to their phobic object with a series of physiological changes resulting from a sympathetic-parasympathetic co-activation. This is in contrast with other specific phobias (e.g., small animal phobias) that usually show a sympathetically mediated, defensive reactivity when exposed to their disorder-relevant stimuli. These data support the use of therapeutic interventions in BII phobia that may differ in some respect from those used in other specific phobias.
(Copyright © 2018 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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