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. 2015 Nov 4;114(6):3386–3399. doi: 10.1152/jn.00648.2015

Fig. 5.

Fig. 5.

Ensemble EMG data from an exemplar participant in a control experiment conducted to determine whether the perturbations used in experiments 1 and 2 were capable of eliciting a startle reflex. Solid black: left sternocleidomastoid (SCM); solid grey: right SCM; dashed black: left orbicularis oculi (OOc). Black arrows denote mean onset time. A: average SCM data from 5 ACT trials where a startling auditory stimulus (SAS) was unexpectedly paired with the perturbation. B: average SCM data from 25 ACT trials without a SAS (identical to ACT trials in experiment 1). C: average OOc data from the same trials as A. D: average OOc data from same trials as in B. Note how trials with the SAS (A and C) have a burst in left OOc, followed by large bilateral bursts in SCM. This is in contrast to the control ACT trials (B and D) where no OOc activity was observed and activity in left and right SCM were small and not activated symmetrically.