Kunimura, H.; Oda, H.; Kawasaki, T.; Tsujinaka, R.; Hamada, N.; Fukuda, S.; Matsuoka, M.; Hiraoka, K. Effect of Laterally Moving Tactile Stimuli to Sole on Anticipatory Postural Adjustment of Gait Initiation in Healthy Males. Brain Sci.2023, 13, 1411.
Kunimura, H.; Oda, H.; Kawasaki, T.; Tsujinaka, R.; Hamada, N.; Fukuda, S.; Matsuoka, M.; Hiraoka, K. Effect of Laterally Moving Tactile Stimuli to Sole on Anticipatory Postural Adjustment of Gait Initiation in Healthy Males. Brain Sci. 2023, 13, 1411.
Kunimura, H.; Oda, H.; Kawasaki, T.; Tsujinaka, R.; Hamada, N.; Fukuda, S.; Matsuoka, M.; Hiraoka, K. Effect of Laterally Moving Tactile Stimuli to Sole on Anticipatory Postural Adjustment of Gait Initiation in Healthy Males. Brain Sci.2023, 13, 1411.
Kunimura, H.; Oda, H.; Kawasaki, T.; Tsujinaka, R.; Hamada, N.; Fukuda, S.; Matsuoka, M.; Hiraoka, K. Effect of Laterally Moving Tactile Stimuli to Sole on Anticipatory Postural Adjustment of Gait Initiation in Healthy Males. Brain Sci. 2023, 13, 1411.
Abstract
The purpose of the present study was to investigate the effect of the laterally moving tactile stimuli to the sole on the anticipatory postural adjustment (APA) of the gait initiation. Thirteen healthy males participated in this study. A sound cue was provided at the beginning of each trial. The moving tactile stimuli were delivered to the sole after the start cue. The loci of the tactile stimuli moved from the left to right most side of the sole, and then moved from the right to left most side of that in a stimuli cycle. The duration of one stimuli cycle was 960 ms, and this cycle repeated 16 times in a trial. The participants made three steps forward from quiet stance at the participants' preferred time after the start cue. The APA did not onset at the specific direction or phase of the moving tactile stimuli, indicating that they did not use the stimuli as a trigger for initiating the gait. The moving tactile stimuli decreased the amplitude and increased the duration of the APA. The moving tactile stimuli increased the time between the APA onset and toe-off of the initial support leg, indicating that they moved slower when initiating gait during the moving tactile stimuli. Those findings are explained by the view that suppression of the APA induced by the moving tactile stimuli to the sole is caused by the decrease in the velocity of the gait initiation, and the slower velocity of the gait initiation is caused by masking tactile sensation of the sole.
Medicine and Pharmacology, Neuroscience and Neurology
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