Membrane specializations in the satellite cells of the chicken ciliary ganglion

Ciliary ganglia of 8 to 19 days in ovo and 1 to 10 days posthatched chickens have been investigated with the freeze-fracture technique. The satellite cell membrane contained at all ages specific small intramembrane particles about 6-7 nm in size and arranged in an orthogonal order (OAPs). Along with these specialized particles, gap junctions and tight junctional strands were found between adjacent satellite cells.