Pterygopalatine ganglion

One of the 4 paired parasympathetic ganglia in the head, the pterygopalatine ganglia sits in the pterygopalatine fossa.  It receives preganglionic parasympathetic input from the parasympathetic part of CN VII (the facial n.).  The post-ganglionic fibers from the pterygopalatine ganglia supply parasympathetic input to the lacrimal gland, mucus membranes of the nasal cavity, soft palate and uvula, tonsils, roof of the mouth, upper lip and gums, the upper part of the pharynx, and the paranasal sinuses.