Tactile suppression is linked to movement onset for startle-triggered responses.

IF 2.6 3区 心理学 Q2 BEHAVIORAL SCIENCES
Kathleen J Peters, Elias Daher, Anthony N Carlsen
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引用次数: 0

Abstract

The ability to perceive a tactile stimulus is reduced in a moving limb, a phenomenon known as tactile suppression. This sensory attenuation effect is attributed to movement-related gating, which allows the central nervous system to selectively process sensory information. However, the source of this gating is uncertain, with some evidence suggesting a forward-model origin of tactile suppression, and other evidence in support of backward masking from peripheral reafference. This study investigated the contribution of these mechanisms to tactile suppression by employing a startling acoustic stimulus (SAS) to involuntarily trigger the early release of a planned movement. A forward-model account would predict that the timing of the suppression would align with the anticipated time of voluntary response initiation, whereas a reafference account would predict that suppression timing would be linked directly to the actual time of the motor act. Participants (n = 27) performed a simple reaction time task involving a rapid wrist extension to release a switch in response to an auditory go-signal, which was occasionally replaced with a 120 dB SAS. On each trial, participants reported whether they detected a near-threshold electrical stimulus applied to the moving hand at various times (50-170ms; 30 ms steps) after the go-signal. Results showed a significantly lower detection rate on SAS trials at all stimulation times (p < .001), supporting the proposition that suppression does not depend on the predicted timing of voluntary initiation, but rather is linked to the production of the motor response. Furthermore, detection rate was significantly lower on SAS trials even when time-locked to movement onset, suggesting that the SAS may have further impeded sensory processing (p < .001).

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来源期刊
Behavioural Brain Research
Behavioural Brain Research 医学-行为科学
CiteScore
5.60
自引率
0.00%
发文量
383
审稿时长
61 days
期刊介绍: Behavioural Brain Research is an international, interdisciplinary journal dedicated to the publication of articles in the field of behavioural neuroscience, broadly defined. Contributions from the entire range of disciplines that comprise the neurosciences, behavioural sciences or cognitive sciences are appropriate, as long as the goal is to delineate the neural mechanisms underlying behaviour. Thus, studies may range from neurophysiological, neuroanatomical, neurochemical or neuropharmacological analysis of brain-behaviour relations, including the use of molecular genetic or behavioural genetic approaches, to studies that involve the use of brain imaging techniques, to neuroethological studies. Reports of original research, of major methodological advances, or of novel conceptual approaches are all encouraged. The journal will also consider critical reviews on selected topics.
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