Vibration in medicine encompasses various forms and effects. The authors present mechanical vibration as a stimulus of primary endings of strongly myelinated afferent fibers of muscular spindle. In rehabilitation medicine (physiotherapy) we apply predominantly local vibration of muscles. Vibration applied on the muscle may induce contraction – tonic vibration reflex. By applying vibration we can also influence perception of the extremity position up to the cortical level. We can be also testing experimentally proprioception. The allbody application of vibration, despite its present popularity, is still questionable and if applied for longer period of time, increased health risk cannot be excluded.

        Key words: vibration, electromyography, EMG, muscular spindle, muscular contraction