Abstract
The differentiation of the perineurium has been examined in replacement nerve grafts in which segments of the third lumbar dorsal root and the peroneal division of the sciatic nerve of rats were excised and resutured into the gaps. This was compared with perineurial differentiation in interchange grafts in which segments of peroneal nerve were grafted into the third lumbar dorsal root and vice versa. It was concluded that not only the origin of the graft but also the local tissue environment is important in determining the morphological outcome, the latter having the predominant influence.
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