No fucking clue what this is or can be used for.
https://www.frontiersin.org/articles/10.3389/fneur.2017.00731/full?
- 1Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, China
- 2Department of Rehabilitation Medicine, First Affiliated Hospital of Anhui Medical University, Hefei, China
Whether stroke-induced paretic muscle changes vary across different
distal and proximal muscles remains unclear. The objective of this study
was to compare paretic muscle changes between a relatively proximal
muscle (the biceps brachii muscle) and two distal muscles (the first
dorsal interosseous muscle and the abductor pollicis brevis muscle)
following hemisphere stroke using clustering index (CI) analysis of
surface electromyograms (EMGs). For each muscle, surface EMG signals
were recorded from the paretic and contralateral sides of 12 stroke
subjects versus the dominant side of eight control subjects during
isometric muscle contractions to measure the consequence of graded
levels of contraction (from a mild level to the maximal voluntary
contraction). Across all examined muscles, it was found that partial
paretic muscles had abnormally higher or lower CI values than those of
the healthy control muscles, which exhibited a significantly larger
variance in the CI
via a series of homogeneity of variance tests (
p
< 0.05). This finding indicated that both neurogenic and myopathic
changes were likely to take place in paretic muscles. When examining two
distal muscles of individual stroke subjects, relatively consistent CI
abnormalities (toward neuropathy or myopathy) were observed. By
contrast, consistency in CI abnormalities were not found when comparing
proximal and distal muscles, indicating differences in motor unit
alternation between the proximal and distal muscles on the paretic sides
of stroke survivors. Furthermore, CI abnormalities were also observed
for all three muscles on the contralateral side. Our findings help
elucidate the pathological mechanisms underlying stroke sequels, which
might prove useful in developing improved stroke rehabilitation
protocols.
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