Additive effects of threat-of-shock and picture valence on startle reflex modulation.

The present study examined the effects of sustained anticipatory anxiety on the affective modulation of the eyeblink startle reflex. Towards this end, pleasant, neutral and unpleasant pictures were presented as a continuous stream during alternating threat-of-shock and safety periods, which were cue...

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Autores principales:	Florian Bublatzky, Pedro M Guerra, M Carmen Pastor, Harald T Schupp, Jaime Vila
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/53ea83fa361b42fabf12ec800ec11de0
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spelling	oai:doaj.org-article:53ea83fa361b42fabf12ec800ec11de02021-11-18T08:01:13ZAdditive effects of threat-of-shock and picture valence on startle reflex modulation.1932-620310.1371/journal.pone.0054003https://doaj.org/article/53ea83fa361b42fabf12ec800ec11de02013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23342060/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The present study examined the effects of sustained anticipatory anxiety on the affective modulation of the eyeblink startle reflex. Towards this end, pleasant, neutral and unpleasant pictures were presented as a continuous stream during alternating threat-of-shock and safety periods, which were cued by colored picture frames. Orbicularis-EMG to auditory startle probes and electrodermal activity were recorded. Previous findings regarding affective picture valence and threat-of-shock modulation were replicated. Of main interest, anticipating aversive events and viewing affective pictures additively modulated defensive activation. Specifically, despite overall potentiated startle blink magnitude in threat-of-shock conditions, the startle reflex remained sensitive to hedonic picture valence. Finally, skin conductance level revealed sustained sympathetic activation throughout the entire experiment during threat- compared to safety-periods. Overall, defensive activation by physical threat appears to operate independently from reflex modulation by picture media. The present data confirms the importance of simultaneously manipulating phasic-fear and sustained-anxiety in studying both normal and abnormal anxiety.Florian BublatzkyPedro M GuerraM Carmen PastorHarald T SchuppJaime VilaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 1, p e54003 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Florian Bublatzky Pedro M Guerra M Carmen Pastor Harald T Schupp Jaime Vila Additive effects of threat-of-shock and picture valence on startle reflex modulation.
description	The present study examined the effects of sustained anticipatory anxiety on the affective modulation of the eyeblink startle reflex. Towards this end, pleasant, neutral and unpleasant pictures were presented as a continuous stream during alternating threat-of-shock and safety periods, which were cued by colored picture frames. Orbicularis-EMG to auditory startle probes and electrodermal activity were recorded. Previous findings regarding affective picture valence and threat-of-shock modulation were replicated. Of main interest, anticipating aversive events and viewing affective pictures additively modulated defensive activation. Specifically, despite overall potentiated startle blink magnitude in threat-of-shock conditions, the startle reflex remained sensitive to hedonic picture valence. Finally, skin conductance level revealed sustained sympathetic activation throughout the entire experiment during threat- compared to safety-periods. Overall, defensive activation by physical threat appears to operate independently from reflex modulation by picture media. The present data confirms the importance of simultaneously manipulating phasic-fear and sustained-anxiety in studying both normal and abnormal anxiety.
format	article
author	Florian Bublatzky Pedro M Guerra M Carmen Pastor Harald T Schupp Jaime Vila
author_facet	Florian Bublatzky Pedro M Guerra M Carmen Pastor Harald T Schupp Jaime Vila
author_sort	Florian Bublatzky
title	Additive effects of threat-of-shock and picture valence on startle reflex modulation.
title_short	Additive effects of threat-of-shock and picture valence on startle reflex modulation.
title_full	Additive effects of threat-of-shock and picture valence on startle reflex modulation.
title_fullStr	Additive effects of threat-of-shock and picture valence on startle reflex modulation.
title_full_unstemmed	Additive effects of threat-of-shock and picture valence on startle reflex modulation.
title_sort	additive effects of threat-of-shock and picture valence on startle reflex modulation.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/53ea83fa361b42fabf12ec800ec11de0
work_keys_str_mv	AT florianbublatzky additiveeffectsofthreatofshockandpicturevalenceonstartlereflexmodulation AT pedromguerra additiveeffectsofthreatofshockandpicturevalenceonstartlereflexmodulation AT mcarmenpastor additiveeffectsofthreatofshockandpicturevalenceonstartlereflexmodulation AT haraldtschupp additiveeffectsofthreatofshockandpicturevalenceonstartlereflexmodulation AT jaimevila additiveeffectsofthreatofshockandpicturevalenceonstartlereflexmodulation
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Additive effects of threat-of-shock and picture valence on startle reflex modulation.

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