Modulation of cocontraction control
Out-of-phase practice trials can modulate slow correlated intermuscular oscillations in cocontraction test
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We investigated the modulations
of neural strategy that accompany the Improvement of cocontraction control due to practice. Using visual feedback of Biceps and Triceps EMG signals to improve co-contraction. Three groups, 20 subjects each, were tested before and after different intervention practices. |
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Signals grand average during cocontraction practice. Target level VL-even (left column), and target level VL-odd (right column) across trials in 20 subjects: Top 2 rows, time series data (top: BB, bottom: TB; time1: 1st half of trials, time2: 2nd half of trials); Rows 3&4, amplitude coherence between BB and TB first (1st-8th trials) and second half (9th-16th trials) for each target level of practice sessions; Similarly, rows 5&6 show phase coherence corresponding to rows 3&4. The x-axis is a measure of time between -4 and 32 s. Note how the phase of reference muscle change each cycle from leading/rising(blue) to lagging/falling(red) at frequencies below 2Hz. BB: Biceps; TB: Triceps; VL: Varying Level.
References
Ahmar NE, Shinohara M. Slow Intermuscular Oscillations are Associated with Cocontraction Steadiness.
Medicine & Science in Sports & Exercise 2017 49(9): 1955–1964, doi: 10.1249/MSS.0000000000001302
Ahmar NE Slow Intermuscular Oscillations and strategies to Tango with a Robot.
Doctoral dissertation 2018, Georgia Institute of Technology
Ahmar NE, Shinohara M. Slow Intermuscular Oscillations are Associated with Cocontraction Steadiness.
Medicine & Science in Sports & Exercise 2017 49(9): 1955–1964, doi: 10.1249/MSS.0000000000001302
Ahmar NE Slow Intermuscular Oscillations and strategies to Tango with a Robot.
Doctoral dissertation 2018, Georgia Institute of Technology
