FUNCTIONAL DIFFERENTIATION IN sB AND sC NEURONS OF TOAD SYMPATHETIC GANGLIA

Abstract

1. The toad tenth sympathetic ganglion consisted of two efferent conduction systems according to conduction velocity and threshold, i. e. sB and sC systems.
2. Neurons in the ganglion might be classified into two groups at least with respect to their soma size, i. e. into large and small neurons.
3. It was suggested by the results of marking the neurons intracellularly that the large neurons might compose the fast sB conduction system, and small neurons sC system.
4. The possibility was presented that sB system might innervate the toxic gland of the skin, and sC system the vascular system of the lower limb.
5. Both sB and sC systems were assumed to consist of adrenergic neurons. or catecholamine containing neurons.