[Synapses of the superior cervical ganglion of the white rat].

In the complexe system of synapses in the white rat's superior cervical ganglion, authors show the existence of: 1 - somato-somatic neuronal synapses 2 - somatic synapses between S.I.F. cells 3 - recurrent auto-synapses They moreover mention widening of synaptic cleft of the synapses between S.I.F. cells and their processes.