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Journal of Hand Surgery (British and European Volume)
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Articles

Acute Stretching of Peripheral Nerves Inhibits Retrograde Axonal Transport

M. TANOUE
M. YAMAGA
J. IDE
K. TAKAGI

From the Department of Orthopaedic Surgery, Kumamoto University School of Medicine, Kumamoto, Japan

Correspondence: M. Tanoue, MD, Department of Orthopaedic Surgery, Kumamoto University School of Medicine, 1-1-1 Honjo, Kumamoto 860, Japan.

The conjugation of horseradish peroxidase with wheat germ agglutinin was used to identify the effect on retrograde axonal transport of stretching the rat sciatic nerve indirectly by 10% and 20% femoral lengthening with a unilateral external fixator. To investigate the relationship between retrograde axonal transport and blood flow in the stretched nerve, nerve blood flow in the sciatic nerve was measured by a hydrogen washout technique. At 11% strain (20% femoral lengthening), the numbers of horseradish peroxidase-labelled motor neuron cells and nerve blood flow had decreased by 43% and 50%, respectively. Histological examination demonstrated ischaemic changes, but not mechanical damage. However, at 6% strain (10% femoral lengthening) there were no significant abnormalities. These findings suggest that the inhibition of retrograde axonal transport can be induced by acute stretching of the peripheral nerve and that circulatory disturbance is the main cause of the inhibition of retrograde axonal transport at the low strain.

Journal of Hand Surgery (British and European Volume), Vol. 21, No. 3, 358-363 (1996)
DOI: 10.1016/S0266-7681(05)80203-7
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