Special somatic spine pynapses in the ciliary ganglion of the chick.
D000818:Animals; D002642:Chick Embryo; D002645:Chickens / Q000033:anatomy & histology*; D005123:Eye / Q000294:innervation*; D005725:Ganglia, Autonomic / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D013569:Synapses / Q000033:anatomy & histology*