Habituation of the Startle Reflex Depends on Attention in Cannabis Users

Overview

Journal BMC Psychol

Publisher Biomed Central

Specialty Psychology

Date 2016 Oct 27

PMID 27782849

Citations 2

Authors

Karina K Kedzior

Eileen Wehmann

Mathew Martin-Iverson

Affiliations

Soon will be listed here.

Abstract

Background: Cannabis use is associated with an attention-dependent deficit in prepulse inhibition of the startle reflex (PPI). The aim of the current study was to investigate startle habituation in cannabis users and healthy controls during two attentional tasks.

Methods: Auditory startle reflex was recorded from orbicularis oculi muscle while participants (12 controls and 16 regular cannabis users) were either attending to or ignoring 100 dB startling pulses. Startle habituation was measured as the absolute reduction in startle magnitude on block 2 (last nine trials) vs. block 1 (first nine trials).

Results: Startle habituation with moderate effect sizes was observed in controls and cannabis users only while they were ignoring the startling pulses but not while they were attending to them. Similar results were also observed in controls (lifetime non-users of cannabis) and cannabis users with lifetime cannabis use disorders (CUD).

Conclusion: Startle habituation appears to depend on selective attention but not on cannabis use. Startle habituation was present when attention was directed away from auditory startling pulses in healthy controls and cannabis users. Such a similar pattern of results in both groups suggests that at least a trend exists towards presence of startle habituation regardless of cannabis use or CUD in otherwise healthy members of the general population.

Citing Articles

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Anxiety and initial value dependence in startle habituation.

Faunce J, Blumenthal T, Waugh C Psychophysiology. 2022; 59(10):e14071.

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