Effects of measurement posture and stimulation intensity on the nociceptive flexion reflex (RIII reflex)

[Purpose] The purpose of this study was to examine the effects of the measurement posture and stimulation intensity on the nociceptive flexion reflex (RIII reflex). [Subjects and Methods] Thirty normal female adult subjects were selected for this study. Their RIII reflexes were measured in three positions and with three degrees of stimulation intensity. The measurement posture was randomly selected. The analysis items were the stimulation intensity of the induced RIII reflex, the amplitude of the RIII reflex, and the numeric rating scale (NRS). [Results] The study results showed statistically significant differences in the interaction effects between the measurement posture and the stimulation intensity. The NRS showed no statistically significant differences in the interaction effects but showed statistically significant differences in the main effect. The amplitude of the RIII reflex showed no statistically significant differences in the interaction effects and showed statistically significant differences only in the stimulation intensity. [Conclusion] The study results suggest that the RIII reflex may be influenced by the measurement posture and stimulation intensity.