Exact(8)
EMG reaction time results followed a similar pattern as accelerometer reaction time.
Two reaction time parameters were assessed; accelerometer reaction time and EMG reaction time.
In one healthy subject, distal EMG reaction time was not assessable due to misplaced EMG electrodes.
In this study, EMG reaction times tended to reflect the fastest occurring responses whereas accelerometer reaction times were more representative of performance across all trials.
For each task, EMG reaction time was therefore assessed from averages of the trials for a given condition in a given patient in Spike 2 (Cambridge Electronic Design).
EMG reaction times for individual trials could not be reliably determined due to a poorer signal to noise ratio, partly due to resting EMG activity due to rigidity.
Similar(52)
An auditory startle reflex was considered present if there was a short latency (<130 ms in healthy subjects and <150 ms in subjects with Parkinson's disease) sternocleidomastoid response following a loud stimulus, sustained above the background, which in simple reaction time tasks was required to precede the limb EMG response (determined from the native unrectified signals).
Kinematic measurements, EMG and ground reaction force data were all internally synchronized.
However, an additional consideration is that the methods of assessing EMG and accelerometer reaction times differed.
Cheung et al [ 24] have used an FE model to simulate several phases of the gait cycle, deriving boundary conditions for these static simulations from EMG and ground reaction force measurements.
Kyrolainen et al. [177] found that as running speed increased so did EMG preactivation and ground reaction forces, along with their rate of force production.
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