| Title |
Intermuscular coherence contributions in synergistic muscles during pedaling
|
|---|---|
| Published in |
Experimental Brain Research, March 2015
|
| DOI | 10.1007/s00221-015-4262-4 |
| Pubmed ID | |
| Authors |
Cristiano De Marchis, Giacomo Severini, Anna Margherita Castronovo, Maurizio Schmid, Silvia Conforto |
| Abstract |
The execution of rhythmical motor tasks requires the control of multiple skeletal muscles by the Central Nervous System (CNS), and the neural mechanisms according to which the CNS manages their coordination are not completely clear yet. In this study, we analyze the distribution of the neural drive shared across muscles that work synergistically during the execution of a free pedaling task. Electromyographic (EMG) activity was recorded from eight lower limb muscles of eleven healthy untrained participants during an unconstrained pedaling exercise. The coordinated activity of the lower limb muscles was described within the framework of muscle synergies, extracted through the application of nonnegative matrix factorization. Intermuscular synchronization was assessed by calculating intermuscular coherence between pairs of EMG signals from co-active, both synergistic and non-synergistic muscles within their periods of co-activation. The spatiotemporal structure of muscle coordination during pedaling was well represented by four muscle synergies for all the subjects. Significant coherence values within the gamma band (30-60 Hz) were identified only for one out of the four extracted muscle synergies. This synergy is mainly composed of the activity of knee extensor muscles, and its function is related to the power production and crank propelling during the pedaling cycle. In addition, a significant coherence peak was found in the lower frequencies for the GAM/SOL muscle pair, possibly related to the ankle stabilizing function of these two muscles during the pedaling task. No synchronization was found either for the other extracted muscle synergies or for pairs of co-active but non-synergistic muscles. The obtained results seem to suggest the presence of intermuscular synchronization only when a functional force production is required, with the observed gamma band contribution possibly reflecting a cortical drive to synergistic muscles during pedaling. |
X Demographics
The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 33% |
| France | 1 | 33% |
| Italy | 1 | 33% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 33% |
| Scientists | 1 | 33% |
| Practitioners (doctors, other healthcare professionals) | 1 | 33% |
Mendeley readers
The data shown below were compiled from readership statistics for 104 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | <1% |
| France | 1 | <1% |
| Brazil | 1 | <1% |
| Unknown | 101 | 97% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 23 | 22% |
| Researcher | 20 | 19% |
| Student > Master | 11 | 11% |
| Student > Bachelor | 9 | 9% |
| Professor | 7 | 7% |
| Other | 18 | 17% |
| Unknown | 16 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Neuroscience | 19 | 18% |
| Engineering | 18 | 17% |
| Medicine and Dentistry | 17 | 16% |
| Sports and Recreations | 9 | 9% |
| Nursing and Health Professions | 7 | 7% |
| Other | 14 | 13% |
| Unknown | 20 | 19% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 06 April 2017.
All research outputs
#13,511,215
of 23,310,485 outputs
Outputs from Experimental Brain Research
#1,587
of 3,262 outputs
Outputs of similar age
#125,876
of 264,915 outputs
Outputs of similar age from Experimental Brain Research
#11
of 50 outputs
Altmetric has tracked 23,310,485 research outputs across all sources so far. This one is in the 41st percentile – i.e., 41% of other outputs scored the same or lower than it.
So far Altmetric has tracked 3,262 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.0. This one has gotten more attention than average, scoring higher than 50% of its peers.
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We're also able to compare this research output to 50 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 78% of its contemporaries.