Ciliary ganglion

The ciliary ganglion is one of the parasympathetic ganglia in the head.  Preganglionic parasympathetic fibers in CN III (the oculomotor n.) synapse in the ciliary ganglion within the orbit.  The postganglionic parasympathetic fibers from the ciliary ganglion travel in the short ciliary nn. to innervate the sphincter pupillae m. and the ciliary m.