Alteration of proprioceptive messages induced by tendon vibration in man: a microneurographic study.

摘要: The activities of single proprioceptive fibres were recorded from the lateral peroneal nerve using transcutaneously implanted tungsten microelectrodes. Unitary discharges originating muscle spindle primary and secondary endings Golgi tendon organs identified by means various physiological tests. sensitivity proprioceptors to mechanical vibrations with a constant low amplitude (0.2–0.5 mm) applied at frequencies receptor-bearing was studied. Muscle (Ia fibres) found be most sensitive this stimulus. In some cases their discharge could driven in one-to-one manner up 180 Hz. Most them also fired harmonically vibration 80 Hz then discharged subharmonic (1/2–1/3) increasing frequencies. (II (Ib either insensitive or only slightly relaxed muscles. effects on sensory response lengthening shortening induced imposed velocity sinusoidal movements ankle joint Modulation frequency coding movement parameters completely partly masked receptor vibration, depending frequency. Moreover, combined elicited quantitatively erroneous messages concerning (amplitude, velocity). increased greatly when tonically contracted. These data confirm that is able preferentially activate Ia afferent channel, even low. They define organs. show triggered ongoing motor undergo series changes during exposure muscles vibration.