Open AccessThe I/T curve coefficient for evaluating changes in neuromuscular excitability after polarized light irradiation - a placebo-controlled randomized trial
Author(s) -
Jolanta Zwolińska
Publication year - 2020
Publication title -
rehabilitacja medyczna
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.108
H-Index - 7
eISSN - 1896-3250
pISSN - 1427-9622
DOI - 10.5604/01.3001.0014.
Subject(s) - irradiation , biceps , medicine , anesthesia , nuclear medicine , surgery , physics , nuclear physics
PILER light affects the sensory and motor excitability of the tissue, and these changes may depend on the color of the filter used in the irradiations.Objective: To evaluate changes in neuromuscular excitability after PILER irradiation with different filters. To evaluate the usefulness of the I/T curve coefficient in neuromuscular excitability test.Material and methods: 60 healthy volunteers assigned to four groups: group v - without filter (n=15), group x - red filter (n=15), group y - blue filter (n=15), group z - placebo (n=15) had biceps brachii irradiated with PILER light. Outcome Measures: I/T curve coefficient for rectangular (■I/T coeff) and triangular (▲I/T coeff) pulses for sensory and motor excitability and the pressure pain threshold (PPT).Results: ■I/T coeff (p=0.0013) and ▲I/T coeff (p=0.0011) for sensory excitability increased significantly in the irradiated group. ■I/T coeff (p=0.0356) and ▲I/T coeff (p=0.0022) increased significantly after blue light irradiation. A significant increase in the▲I/T coeff (p=0.0439) in motor excitability was observed in the irradiated group. ■I/T coeff (p=0.0309) and ▲I/T coeff (p=0.0064) increased significantly after blue light irradiation.Conclusion: PILER light may reduce muscle excitability. Using a blue filter may increase the sensory threshold, and myorelaxation. Further experiments are necessary to confirm the usefulness of the I/T curve coefficient.