Anticipatory postural adjustment in the absence of normal peripheral feedback
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Cited by (35)
Schizotypal traits and forearm motor control against self-other produced action in a bimanual unloading task
2018, NeuropsychologiaCitation Excerpt :When the weight is removed by oneself, the postural disturbance barely occurs due to an anticipatory decrease of the muscle activity to resist the weight (Hugon et al., 1982; Lum et al., 1992; Massion et al., 1999). In contrast, when the weight is removed by others, the hand rises following the lifted weight because one cannot predict the accurate timing of the lifting, regardless of the knowledge, lifting experience, and visual feedbacks (Diedrichsen et al., 2003; Forget and Lamarre, 1990; Hugon et al., 1982; Itaguchi, 2013). Such upward hand shifting caused by others’ lifting is a natural response, unless one is executing sustained co-contraction as a waiter does when someone takes a drink from a holding tray.
Balance perturbations
2018, Handbook of Clinical NeurologyCitation Excerpt :To minimize this occurrence, a proactive suppression of the support arm's tonic muscle activation and torque occurs in advance of the reaching arm's removal of the load, and thus preempts an unwanted up-thrust of the support arm (Hugon et al., 1982; Massion et al., 1989). In contrast, if the load is removed by an external source (e.g., another person), then an observable destabilizing up-thrust of the supporting arm occurs because no anticipatory compensation occurred and reactive postural corrections are triggered following the perturbation of posture (Forget and Lamarre, 1990, 1995). Contributions of APAs to optimizing the control of goal-directed movements by stabilizing body segments may also enhance the speed or accuracy of performance.
Neuromagnetic imaging reveals timing of volitional and anticipatory motor control in bimanual load lifting
2013, Behavioural Brain ResearchCorticospinal control strategies underlying voluntary and involuntary wrist movements
2013, Behavioural Brain ResearchCitation Excerpt :To minimize this confounder, we delivered TMS during a brief muscle shortening at each of these positions (TMS conditioning technique [21]). Muscle shortening usually elicits a silent period in the tonic EMG activity [35–39] resulting from a pause in the discharges of muscle spindle afferents [38], possibly complemented by reciprocal inhibition of these MNs elicited by simultaneous stretch of antagonist muscles. The delay between the onset of the torque pulse and TMS (18–22 ms) was found empirically and individually for each subject such that the MEP occurred during an EMG silent period.
Subthreshold corticospinal control of anticipatory actions in humans
2011, Behavioural Brain ResearchCitation Excerpt :We used TMS conditioned by muscle shortening to evaluate the contribution of the corticospinal system to the augmentation of extensor facilitation before adjusted unloading. Muscle shortening usually elicits a silent period in the tonic EMG activity, thus decreasing the excitability of motoneurons [16–19]. The silent period is caused by de-facilitation of motoneurons following a short-lasting pause in the activity of spindle afferents resulting from shortening of the host muscle, possibly complemented by reciprocal inhibition of these motoneurons resulting from simultaneously stretched antagonist muscles.
This work was supported by a Group grant from the Medical Research Council of Canada. R..F. is a ‘chercheur-boursier’ of the Fonds de la Recherche en Santédu Québec.