Abstract
[Purpose] The purpose of this study was to investigate the decrease in muscle tone induced by linear polarized near-infrared ray (LPNR) irradiation on the gastrocnemius and tibial nerves, and to consider the neural and peripheral components and time since onset of corebrovascular disease (CVD). [Subjects and Method] Forty-two CVD patients participated in this study. They were randomly divided into 3 groups. The N group was irradiated on the tibial nerve, G group was irradiated on the gastrocnemius, and C group was not irradiated. Rl and R2 of the modified tardieu scale (MTS) were measured 4 times: before and after irradiation, after irradiation on the fifth day and five days after the last irradiation. Subgroups were established for differences in time since onset of CVD (short group, long group) and quality of muscle rection (QMR) of the MTS (QMR of 2 and under, QMR of 3 and up). [Results] The immediate effect on R1 mainly reflected the neural components of muscle tone in N group of short group was significantly different from other groups. [Conclusion] The results suggest that LPNR irradiation of the nerves is effective at suppressing neural components of muscle tone in subjects with short times since onset of CVD.
