ABSTRACT
Clusters of legs having prothoracic and metathoracic origins were grown from the metathoracic coxa of the cockroach.
Of these legs, those which were innervated contained only one, or occasionally two, of the three major nerves innervating the cockroach leg.
Stimulation of a particular leg nerve (no. 3, 5 or 6) evoked movement at the same joints and in the same directions in a leg having only one nerve as in a normal leg.
Stimulation of a particular metathoracic nerve generally produced the same movements in a prothoracic leg transplanted to the metathoracic site as it did in a regenerated or intact metathoracic leg.
Of these 49 innervated legs, 37 apparently contained only one nerve, eleven contained two nerves, and one contained three nerves.
One exception to this statement is that nerve 5 never evoked any tarsal movements in singly regenerated legs, whereas it did in normal legs and those in clusters. Also nerve 6 never evoked flexion of the coxo-femoral joint in singly regenerated legs, whereas it did in both other types of leg.
Only prothoracic legs showed movements at the tibio-tarsal joint upon stimulation of nerve 5, and only metathoracic legs showed flexion at the coxo-femoral joint upon stimulation of nerve 6. These exceptions are probably not significant due to the small numbers of animals involved.
