Triggering Mechanisms for Motor Actions: The Effects of Expectation on Reaction Times to Intense Acoustic Stimuli
Embargo Lift Date
MetadataShow full item record
Motor actions can be released much sooner than normal when the go-signal is of very high intensity (>100 dBa). Although statistical evidence from individual studies has been mixed, it has been assumed that sternocleidomastoid (SCM) muscle activity could be used to distinguish between two neural circuits involved in movement triggering. We summarized meta-analytically the available evidence for this hypothesis, comparing the difference in premotor reaction time (RT) of actions where SCM activity was elicited (SCM+ trials) by loud acoustic stimuli against trials in which it was absent (SCM- trials). We found ten studies, all reporting comparisons between SCM+ and SCM- trials. Our mini meta-analysis showed that premotor RTs are faster in SCM+ than in SCM- trials, but the effect can be confounded by the variability of the foreperiods employed. We present experimental data showing that foreperiod predictability can induce differences in RT that would be of similar size to those attributed to the activation of different neurophysiological pathways to trigger prepared actions. We discuss plausible physiological mechanisms that would explain differences in premotor RTs between SCM+ and SCM- trials.
Showing items related by title, author, creator and subject.
The interaction of approach-alcohol action tendencies, working memory capacity, and current task goals predicts the inability to regulate drinking behaviorSharbanee, Jason; Stritzke, W.; Wiers, R.; Young, P.; Rinck, M.; MacLeod, C. (2013)The inability to regulate alcohol consumption has been attributed to an imbalance between stimulus-driven behavioral biases, or action tendencies, and the ability to exert goal-directed control, or working memory capacity ...
Leow, L.; Uchida, A.; Egberts, J.; Riek, S.; Lipp, Ottmar; Tresilian, J.; Marinovic, Welber (2018)Motor actions can be released much sooner than normal when the go-signal is of very high intensity (> 100dBa). Although statistical evidence from individual studies has been mixed, it has been assumed that sternocleidomastoid ...
Effectiveness of educational interventions to raise men's awareness of bladder and bowel health: a systematic reviewHodgkinson, B.; Tuckett, A.; Hegney, Desley; Paterson, J.; Kralik, D. (2010)Background: Urinary incontinence (UI) has been defined as a condition in which the involuntary loss of urine is a social or hygienic problem and is objectively demonstrable. Urinary incontinence is a common health problem ...