The sensation of the nose is derived from the first 2 branches of the trigeminal nerve. The following define successfully delineates the respective sensory distribution of the nostril and face of the trigeminal nerve. The parasympathetic supply is derived from the larger superficial petrosal (GSP) branch of cranial nerve VII. The GSP joins the deep petrosal nerve (sympathetic provide), which comes from the carotid plexus to form the vidian nerve within the vidian canal. The vidian nerve travels via the pterygopalatine ganglion (with solely the parasympathetic nerves forming synapses right here) to the lacrimal gland and glands of the nostril and palate through the maxillary division of the trigeminal nerve. Superiorly, the paired nasal bones are connected to the frontal bone (see Image 3). Superolaterally, they are related to the lacrimal bones, and inferolaterally, they are connected to the ascending processes of the maxilla. Posterosuperiorly, the bony nasal septum is composed of the