http://en.wikipedia.org/wiki/Anatomy_of_the_human_nose
The supply of parasympathetic nerves to the face and the upper jaw (maxilla) derives from the greater superficial petrosal (GSP) branch of cranial nerve VII, the facial nerve. The GSP nerve joins the deep petrosal nerve (of the sympathetic nervous system), derived from the carotid plexus, to form the vidian nerve (in the vidian canal) that traverses the pterygopalatine ganglion (an autonomic ganglion of the maxillary nerve), wherein only the parasympathetic nerves form synapses, which serve the lacrimal gland and the glands of the nose and of the palate, via the (upper jaw) maxillary division of cranial nerve V, the trigeminal nerve.
The supply of parasympathetic nerves to the face and the upper jaw (maxilla) derives from the greater superficial petrosal (GSP) branch of cranial nerve VII, the facial nerve. The GSP nerve joins the deep petrosal nerve (of the sympathetic nervous system), derived from the carotid plexus, to form the vidian nerve (in the vidian canal) that traverses the pterygopalatine ganglion (an autonomic ganglion of the maxillary nerve), wherein only the parasympathetic nerves form synapses, which serve the lacrimal gland and the glands of the nose and of the palate, via the (upper jaw) maxillary division of cranial nerve V, the trigeminal nerve.
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