The facilitation of motor actions by acoustic and electric stimulation
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The presentation of a loud acoustic stimulus during the preparation of motor actions can both speed movement initiation and increase response vigor. Several recent studies have explored this phenomenon as a means to investigate the mechanisms and neural correlates of movement preparation. Here, we sought to determine the generality of this effect across sensory modalities, and in particular whether unexpected somatosensory stimulation can facilitate movements in a manner similar to loud sounds. We show that electric and acoustic stimuli can be similarly effective in inducing the early release of motor actions, in both reaction time and anticipatory timing tasks. Consistent with recent response activation models of motor preparation, we also demonstrate that increasing the intensity of electric stimuli induces both progressive decreases in reaction time and increases in response vigor. Additionally, we show that the early release of motor actions can be induced by electric stimuli targeting predominantly either muscle afferents or skin afferents. Finally, we show that simultaneous acoustic and electric stimulation leads to earlier releases of anticipatory actions than either unimodal stimulus. These findings may lead to new avenues for experimental and clinical exploitation of the effects of accessory sensory information on movement preparation and initiation.
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Premovement inhibition can protect motor actions from interference by response irrelevant sensory stimulation.McInnes, Aaron Nicholas ; Lipp, Ottmar V ; Tresilian, James R; Vallence, Ann-Maree; Marinovic, Welber (2021)KEY POINTS: Suppression of corticospinal excitability is reliably observed during preparation for a range of motor actions, leading to the belief that this preparatory inhibition is a physiologically obligatory component ...
Electric and acoustic stimulation during movement preparation can facilitate movement execution in healthy participants and stroke survivorsMarinovic, Welber; Brauer, S.; Hayward, H.; Carroll, T.; Riek, S. (2016)There has been increasing interest in the use of loud acoustic stimulation (LAS) to gain insight into the preparation and initiation of motor actions. Typically, LAS presented during movement preparation in healthy ...
Marinovic, Welber; Tresilian, J.; de Rugy, A.; Sidhu, S.; Riek, S. (2014)A loud acoustic stimulus (LAS) presented during movement preparation can induce an early release of the prepared action. Because loud sound has been found to have an inhibitory effect on motor cortex excitability, it is ...