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Structurally specialized contacts between the photoreceptors of the retina of the axolotl
Author(s) -
Custer Nancy V.
Publication year - 1973
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901510104
Subject(s) - axolotl , retina , biology , ambystoma mexicanum , postsynaptic potential , anatomy , inner limiting membrane , inner plexiform layer , limiting , neuroscience , biophysics , microbiology and biotechnology , regeneration (biology) , biochemistry , receptor , mechanical engineering , engineering
Electron microscopic examination of the retina of the axolotl, Ambystoma mexicanum , revealed several types of morphological junctions between individual photoreceptors. Distal to the outer limiting membrane of the retina, gap junctions were found between neighboring rods and between neighboring rods and cones. In the external plexiform layer, the synaptic terminals of cones and double cones are often in positions opposite the synaptic ribbons of rod terminals that have been traditionally defined as postsynaptic. A few tight junctions between photoreceptor telodendria were observed. Relationships between the members of double cones are also described.