[Preliminary observations on ciliary ganglia in organ culture].

Preliminary observations have been made concerning some ultrastructural aspects of the choroid neurons in organ-cultured ciliary ganglia. Reactive nuclear as well as cytoplasmic modifications have been described. They consist mainly of nuclear dense bodies, arrays of smooth endoplasmic reticulum cisternae, clusters of condensed mitochondria. These modifications would confirm the existence of an interaction occurring between the neurons of the ciliary ganglion and their target organs.