Exploring the receptor origin of vibration-induced reflexes

Exploring the receptor origin of vibration-induced reflexes

Study design An experimental design. Objectives The aim of this study was to determine the latencies of vibration-induced reflexes in individuals with and without spinal cord injury (SCI), and to compare these latencies to identify differences in reflex circuitries. Setting A tertiary rehabilitation...

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Bibliographic Details
Published in:Spinal cord Vol. 58; no. 6; pp. 716 - 723
Main Authors: Yildirim, Mustafa A., Topkara, Betilay, Aydin, Tugba, Paker, Nurdan, Soy, Derya, Coskun, Evrim, Ones, Kadriye, Bardak, Aysenur, Kesiktas, Nur, Ozyurt, Mustafa G., Celik, Berna, Onder, Burcu, Kılıc, Aysegul, Kucuk, Habib C., Karacan, Ilhan, Türker, Kemal S.
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 01-06-2020
Nature Publishing Group
Subjects:
631/378/2632/1664
692/617/375/1824
Anatomy
Biomedical and Life Sciences
Biomedicine
Design of experiments
Experimental design
Human Physiology
Intervals
Latency
Muscles
Neurochemistry
Neuropsychology
Neurosciences
Receptors
Reflexes
Rehabilitation
Soleus muscle
Spinal cord injuries
Vibration
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Summary:Study design An experimental design. Objectives The aim of this study was to determine the latencies of vibration-induced reflexes in individuals with and without spinal cord injury (SCI), and to compare these latencies to identify differences in reflex circuitries. Setting A tertiary rehabilitation center in Istanbul. Methods Seventeen individuals with chronic SCI (SCI group) and 23 participants without SCI (Control group) were included in this study. Latency of tonic vibration reflex (TVR) and whole-body vibration-induced muscular reflex (WBV-IMR) of the left soleus muscle was tested for estimating the reflex origins. The local tendon vibration was applied at six different vibration frequencies (50, 85, 140, 185, 235, and 265 Hz), each lasting for 15 s with 3-s rest intervals. The WBV was applied at six different vibration frequencies (35, 37, 39, 41, 43, and 45 Hz), each lasting for 15 s with 3-s rest intervals. Results Mean (SD) TVR latency was 39.7 (5.3) ms in the SCI group and 35.9 (2.7) ms in the Control group with a mean (95% CI) difference of −3.8 (−6.7 to −0.9) ms. Mean (SD) WBV-IMR latency was 45.8 (7.4) ms in the SCI group and 43.3 (3.0) ms in the Control group with a mean (95% CI) difference of −2.5 (−6.5 to 1.4) ms. There were significant differences between TVR latency and WBV-IMR latency in both the groups (mean (95% CI) difference; −6.2 (−9.3 to −3.0) ms, p  = 0.0001 for the SCI group and −7.4 (−9.3 to −5.6) ms, p  = 0.011 for Control group). Conclusions The results suggest that the receptor of origin of TVR and WBV-IMR may be different.
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ISSN:1362-4393
1476-5624
DOI:10.1038/s41393-020-0419-5