Vibration decreases the responsiveness of Ia afferents and spinal motoneurons in humans
Mitsuhiro Nito, Takuya Yoshimoto, Wataru Hashizume, Masaomi Shindo, Akira Naito
Abstract
Vibration decreased the responsiveness of Ia afferents from the muscle exposed to vibration, and the duration of depressive effect was modulated by the duration and frequency of the vibration: a longer duration and a higher frequency of vibration led to a longer recovery time of the depression. In addition to this presynaptic effect, it also depressed the responsiveness of spinal motoneurons, indicating postsynaptic inhibition through specific circuits triggered by Ia impulses.
Topics & Concepts
H-reflexReflexStimulationJaw jerk reflexMedicineF waveFacilitationBicepsNeuroscienceAnesthesiaAudiologyPhysical medicine and rehabilitationAnatomyPsychologyInternal medicineNerve conduction velocityMuscle activation and electromyography studiesMusculoskeletal pain and rehabilitationTranscranial Magnetic Stimulation Studies