Studies on Antidromic Vasodilatation. II. Synaptic Connections in the Dorsal Root Ganglion. ∗ †

Conclusions

Evidence is presented to show that synapses exist between physiologically efferent fibers which course the dorsal root in the frog and that these synapses are present in the dorsal root ganglia.

It is further concluded that these synapses are concerned in the transmission of the impulses which result in peripheral vasodilatation since injections of nicotine into the dorsal root ganglia prevent the appearance of vasodilatation which occurs following stimulation of the peripheral stump of the dorsal root sectioned between the ganglion and the cord.