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The lacrimal nerve branches from the ophthalmic nerve immediately before traveling through the superior orbital fissure to enter the orbit. [citation needed]At the superior portion of the lateral wall of the orbit, it also receives a secretomotor [2]: 495 communicating [2]: 402 parasympathetic [3] branch from the zygomaticotemporal nerve [2]: 495 for the lacrimal gland.
The lacrimal branch of the ophthalmic nerve (itself a branch of trigeminal nerve V1) supplies secretomotor innervation to the lacrimal gland, stimulating its secretion of the aqueous layer. However, these nerves fibers originate from the facial nerve (VII) [2] and only travel briefly with fibers from the trigeminal nerve.
The lacrimal gland is a compound tubuloacinar gland, it is made up of many lobules separated by connective tissue, each lobule contains many acini.The acini composed of large serous cells which, produce a watery serous secretion, serous cells are filled with lightly stained secretory granules and surrounded by well-developed myoepithelial cells and a sparse, vascular stroma.
Receives taste from the posterior 1/3 of the tongue, provides secretomotor innervation to the parotid gland, and provides motor innervation to the stylopharyngeus. Some sensation is also relayed to the brain from the palatine tonsils. This nerve is involved together with the vagus nerve in the gag reflex. X Vagus: Both sensory and motor
Depicts nerve branches that are involved in the autonomic innervation of the lacrimal gland. The terminal parts of the pathway are variable between individuals and differ for the other glands of the deep face.
The innervation of the lacrimal apparatus, which involves both a sympathetic supply through the carotid plexus of nerves around the internal carotid artery, and parasympathetically from the lacrimal nucleus of the facial nerve. The blood supply to the lacrimal gland is provided by the ophthalmic artery with its branch - the lacrimal artery ...
The zygomatic nerve also carries postganglionic parasympathetic axons. [1] These axons have their cell bodies in the pterygopalatine ganglion. They travel from the ganglion to the zygomatic nerve, and then to the lacrimal nerve through a communicating branch. From the lacrimal nerve, they enter the lacrimal gland and provide secretomotor supply ...
Preganglionic fibers en route to the pterygopalatine ganglion (destined to ultimately innervate the lacrimal gland and the mucosal glands of the nose, palate, and pharynx) subsequently form the greater petrosal nerve, whereas those en route to the submandibular ganglion (destined to ultimately innervate the submandibular and sublingual salivary glands) subsequently form the chorda tympani.