| Summary: | 碩士 === 國立陽明大學 === 物理治療暨輔助科技學系 === 104 === Introduction
Motor performance such as joint proprioception, weight acceptance, coordination, maximal force and balance may be affected by compression garments. The compression garments provide additional sensory inputs to improve joint proprioception and adjust movement. In previous studies, the majority of the subjects have improved in motor performance with compression garments. However, there are still conflict results and non-responders. The results of a recent fMRI study indicated that application of knee brace can influence brain activities and provide more sensory inputs. More or less, compression garments indeed have influence on motor performance, and further regulate the brain activity by enhancing sensory input.
The cortical oscillation in 13~100 Hz range has shown to be coherent with electromyogram (EMG) of corresponding muscles, which is also called corticomuscular coherence (CMC). CMC is known as a phenomenon results from corticospinal neurons, which can reflect motor performance.
In other studies that modulated peripheral nerve inputs changed CMC, and the initial CMC state would influence the motor performance response of sensory inputs. In this study, we defined the CMC state by recording the occurrence of maximum CMC in β or γ band. Compression garments is also a type of sensory input and the initial CMC state may influence its effects on motor performance.
Objective
The purpose of this study was to investigate the different state of CMC influences the change of motor performance in response to compression sleeve.
Methods
13 healthy participants were recruited in this study. Subjects were then separated into 2 groups depended on the occurrence of peak CMC during the visuomotor task (group B: beta band; group G: gamma band). Next, they performed visuomotor task and joint position test of their wrist joint with and without compression sleeve. EEG, surface EMG and goniometer concurrently recorded the brain activity, signals of extensor carpi radialis brevis muscle, and the wrist range of motion respectively. CMC, steadiness, accuracy and joint position error were measured and analyzed.
Statistics
Paired-sample nonparametric statistics were used to compare the variables with or without compression sleeve before and after grouping. Significant level was set at p <0.05.
Results
The peak and area of γ band decreased significantly in group G. The steadiness and joint position error improved significantly with compression sleeve in pooled data. To take a closer look, wearing compression sleeve improved the steadiness and joint position error significantly in group B but not in group G.
Discussion and conclusion
We conclude that the compression sleeve can improve motor performance. The peak CMC in beta or gamma band may determine the effectiveness of the compression garment; those with peak CMC within beta band (group B) demonstrate better response to sensory inputs provided by compression garment.
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