They also report that specific tension was reduced when pulse duration was decreased from 450 to 150 [micro]s, while frequency remained constant at 100 Hz, suggesting that pulse duration is influencing something other than recruitment of motor units
. Part of their explanation included the notion that longer pulse durations may preferentially activate fast-twitch motor units
, which produce higher torque than slow-twitch motor units
The 180[degrees]/s exercises, which are for endurance motor unit
potential, were the highest at week 2, and the average power steadily increased from week 4 to week 8.
[5.] Enoka RM, Bawa P, Wakeling JM, Gabriel DA, Kamen G, Meyer F, Stegeman D, van Wessel T, Zwarts MJ, Rainoldi A, Dimitrova NA, Dimitrov GV, Merletti R, Cresswell AG, Barry BK, Pincivero DM (2008) Comments on Point:Counterpoint: Spectral properties of the surface EMG can characterize/do not provide information about motor unit
recruitment strategies and muscle fiber type.
A greater force is the result of greater motor unit
(10.) Farina D, Li X, Madeleine P (2008) Motor unit
acceleration maps and interference mechanomyographic distribution.
Therefore, a closer examination of how acute indirect vibration may influence neural responses of motor unit
firing, motor unit
synchronisation, inter-muscular coordination is required.
In addition, MUNE methods provide a means of measuring motor unit
size, enabling tracking of both loss of motor units
and the compensatory phenomenon of collateral reinnervation, and have the advantage of measuring the severity of nerve injury in neuropathy with retained CMAP amplitude; MUNE is already used in neuromuscular disorders such as amyotrophic lateral sclerosis, spinal muscular atrophy, and neuropathies to monitor neuronal loss [18, 19].
In addition to the process of waveform simplification after the loss of motor units
, there is also a formation process of large and complex motor units
First, not all the motor units
are active during pathological tremor, and the muscle activation pattern, estimated from bipolar EMG recordings, depends significantly on the electrode position (Figure 1) and on motor unit
distribution within the muscle tissue .
Although concentric needle (CN) electrodes have been used to assess jitter in myasthenia gravis patients and healthy controls, there are few reports using CN electrodes to assess motor unit
instability and denervation in neurogenic diseases.
Using advanced signal processing techniques, the authors (12) reported significant intermuscular coherence between the VL and VM that was believed to potentially reflect shared motor unit
Additionally, there was a reduction in the recruitment and interference pattern of motor units
and chronic motor unit
remodeling changes to these muscles.