Electron Microscopy: Tight Junctions in Synapses of the Chick Ciliary Ganglion

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Science  01 Apr 1966:
Vol. 152, Issue 3718, pp. 76-78
DOI: 10.1126/science.152.3718.76


Examination of the synaptic membranes in calyciform endings of the chick ciliary ganglion has shown tight junctions selectively located on axon hillocks of postsynaptic neurons. Observations of similar membrane fusion in other junctions that involve electrotonic transmission suggest the possibility of identifying electrotonic junctions by electron microscopy.