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. Author manuscript; available in PMC: 2021 Aug 31.
Published in final edited form as: Exp Brain Res. 2019 Jul 10;237(9):2353–2365. doi: 10.1007/s00221-019-05592-1

Fig. 6.

Fig. 6

(a) For a typical participant, the latency of SCM muscle activity was shifted earlier than voluntary reaches as probe perturbations were applied closer to the GO. Arrows point to the median SCM latency for each probe perturbation time. (b) The probability of early SCM muscle activity was affected by temporal certainty condition and probe perturbation time. In each temporal certainty condition, the probability of early SCM activity evolved across probe perturbation times similar to the development of the average TRI muscle response from 75–100 ms following the perturbation. The detection threshold for early SCM activity was set from voluntary reaching trials in the MED certainty condition at 0.05 (dashed line). Note: The WARN-50 probe perturbation was delivered prior to the beginning of motor planning, and the probability of early SCM activity was zero for all certainty conditions as defined in the Methods section. Data are the fitted mean ± standard error. See Results section for statistical comparisons.