Avtor/Urednik		Kovačič, Uroš; Bajrović, Fajko; Sketelj, Janez
Naslov		Recovery of cutaneous pain sensitivity after end-to-side nerve repair in the rat
Tip		članek
Vir		J Neurosurg
Vol. in št.		Letnik 91
Leto izdaje		1999
Obseg		str. 857-62
Jezik		eng
Abstrakt		Object. The hypothesis that collaterally sprouting axons from an uninjured donor nerve may provide recovery of pain sensitivity in the skin after end-to-side nerve repair was investigated in rats. In addition, the effects of this technique on the donor nerve was examined. Methods. The distal stump of the transected peroneal nerve was sutured end to side to the intact sural nerve. No epineural window or perineural slit was made in the sural nerve at the site of coaptation. Other nerves in the leg were transected and ligated. Eighteen weeks later, the sural nerve was transected at a site distal from the coaptation site. The residual pain sensitivity in the peroneal innervation field in the instep was documented using the skin pinch test in three of 11 animals. The area of sensitivity encompassed 19 to 40% of the maximum nociceptive innervation area of the normal peroneal nerve. The nerve pinch test revealed functional sensory axons in all communicating peroneal nerves, in which 277 +- 119 myelinated axons (mean +- standard deviation) were found by histological investigation. Conclusions. The authors conclude that at least partial recovery of sensory functional due to collateral sprouting of axons after end-to-side nerve repair is possible in principle. However, the presence of functional sensory axons in the peroneal nerve stumps did not guarantee the recovery of skin sensitivity to pain in all animals. No functional or morphological evidence of an untoward effect of collateral sproting into the end-to-side communicating nerve was detected in the axons of the donor nerve itself.
Deskriptorji		PERONEAL NERVE SURAL NERVE NERVE REGENERATION PAIN THRESHOLD RATS, WISTAR NERVE FIBERS, MYELINATED NEURONS, AFFERENT NOCICEPTORS SKIN WALLERIAN DEGENERATION