AI Article Synopsis
- Loss of motor coordination is a significant issue for stroke patients, often evaluated through muscle synergy, which reflects their ability to control movements.
- Recent research utilized nonnegative matrix factorization (NNMF) to analyze muscle synergy in subacute stroke patients, involving two measurements to track changes over time.
- Findings indicated that while the number of muscle synergies didn't necessarily correlate with functional improvements, the merging of these synergies was linked to enhanced muscle strength and ankle joint movement, suggesting that this merger could be a key indicator of recovery post-stroke.
Article Abstract
Loss of motor coordination is one of the main problems for patients after stroke. Muscle synergy is widely accepted as an indicator of motor coordination. Recently, the characteristics of muscle synergy were quantitatively evaluated using nonnegative matrix factorization (NNMF) with surface electromyography. Previous studies have identified that the number and structure of synergies were associated with motor function in patients after stroke. However, most of these studies had a cross-sectional design, and the changes in muscle synergy during recovery process are not clear. In present study, two consecutive measurements were conducted for subacute patients after stroke and the change of number and structure of muscle synergies during gait were determined using NNMF. Results showed that functional change did not rely on number of synergies in patients after subacute stroke. However, the extent of merging of the synergies was negatively associated with an increase in muscle strength and the range of angle at ankle joint. Our results suggest that the neural changes represented by NNMF were related to the longitudinal change of function and gait pattern and that the merging of synergy is an important marker in patients after subacute stroke.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5206781 | PMC |
| http://dx.doi.org/10.1155/2016/5282957 | DOI Listing |
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