Vibration‐induced disruption of retrograde axoplasmic transport in peripheral nerve

Hand‐arm vibration syndrome (HAVS) results from excessive exposure to hand‐transmitted vibration. Whether the peripheral nerve damage characteristic of HAVS is a direct result of vibration or is secondary to vascular insufficiency remains unclear. The purpose of this study was to explore the effect of vibration exposure on axoplasmic transport in peripheral nerves and soleus motor neurons. Sciatic nerves and motor neurons from rats following two 5‐h periods of vibration exposure demonstrated disruption in retrograde transport compared to normal. After 10 days of vibration (5 h/day), axoplasmic transport failed to recover within 24–48 h in most rats. This study demonstrates that disrupted axoplasmic transport is an early consequence of short‐term vibration exposure. The effects of vibration on axoplasmic transport also appear to be cumulative. This study provides a new biological way to evaluate measures to prevent early vibration injury. Muscle Nerve, 2005

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