The innervation pattern of fast myotomal muscle in the teleostMyoxocephalus scorpius: A reappraisal.

The pattern of polyneuronal innervation in the sculpinMyoxocephalus scorpius was examined. The majority of fast fibres in sculpin are innervated by both adjacent nerves, and <15% receive input from sub-adjacent myotomes. Stimulation through both adjacent and sub-adjacent nerves results in muscle action potentials. Each adjacent nerve supplies 2-5 axons to a given fibre. A typical fibre is probably innervated by around 4-6 axons, and pre-terminal branching accounts for the 8-20 endplates present on these fibres.