Abstract

Summary Following histological and histochemical investigation of muscle biopsies taken from the Abbe flaps and the normal lateral lip elements of six patients, evidence is submitted to support the concept of motor reinnervation occurring in such flaps. Such evidence is based chiefly on the demonstration in the flaps of: 1.Normally striated skeletal muscle elements. 2.Motor end-plates exhibiting cholinesterase activity of normal intensity. 3.Nerve axons exhibiting some of the characteristics of motor nerve fibres.

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