Abstract
1. 1. The peripheral axon distribution from two bursting neurons was investigated using electrophysiological methods. Both of these cells send out a bundle of axon branches which goes via the visceral nerve to the heart and in the uterine nerve. 2. 2. The relative number of axon branches in the two nerves was determined through double-shock experiments. 3. 3. The axon bundle takes the visceral nerve and its uterine branch, supplying the effector systems in parallel. 4. 4. Slight differences in conduction velocity between the axon branches produce an enlargement of the efferent volley. 5. 5. The number of active axon branches conveying orthodromic or antidromic spikes is controlled by inhibitory potentials converging onto the initial part of the bundle, so that the two bursting cells amount to a pool of 35 to 40 interconnected nerve cells. 6. 6. The atypical axonal distribution of the two bursting cells might be related to their neurosecretory properties.
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