Where does the infratrochlear nerve exit?

Where does the infratrochlear nerve exit?

The Infratrochlear Nerve Course It exits the orbit under the superior orbital margin and above the medial canthal tendon.

What foramen does the ophthalmic nerve pass through?

The ophthalmic, maxillary, and mandibular branches of the trigeminal nerve leave the skull through 3 separate foramina: the superior orbital fissure, the foramen rotundum, and the foramen ovale, respectively.

What does infratrochlear nerve supply?

The infratrochlear nerve provides sensory innervation to the skin of the inferior medial canthus and lateral nose, conjunctiva, caruncle, and lacrimal sac. The infraorbital nerve (V2), supplies the skin and conjunctiva of the lower lid, lower part of nose and upper lip.

Where does the nasociliary nerve come from?

The nasociliary nerve is a branch of the ophthalmic nerve, itself a branch of the trigeminal nerve (CN V). It is intermediate in size between the other two branches of the ophthalmic nerve, the frontal nerve and lacrimal nerve.

What does frontal nerve branch into?

The frontal nerve gives off two corollary branches: the supraorbital and the supratrochlear nerves. The supraorbital nerve is larger and more laterally situated than the supratrochlear nerve, and it supplies sensory fibers to the forehead, upper eyelid, and anterior scalp.

What is the function of the nasociliary nerve?

The nasociliary nerve provides sensory perception to the cornea, eyelids, conjunctiva, and cells and mucous membranes of the nasal cavity. Its function is exclusively sensory, with no motor function. The ophthalmic nerve, of which the nasociliary nerve branches, networks with the eye’s motor nerves.

Where does ophthalmic nerve go through?

The ophthalmic nerve branches from the trigeminal nerve in the skull and begins in the lateral wall of the cavernous sinus, a cavity between the bones in the front and middle of the skull. The ophthalmic nerve lies below the oculomotor and trochlear nerves and divides into the frontal, lacrimal, and nasociliary nerves.

Where does the ophthalmic nerve enter the skull?

Cranial Nerve V1: Ophthalmic Nerve The ophthalmic nerve courses anteriorly from the trigeminal ganglion to enter the superior aspect of the cavernous sinus. The nerve may require division if it is involved with an intracavernous tumor or a lesion that extends to the superior orbital fissure.

What does the ophthalmic nerve innervate?

The ophthalmic nerve supplies sensory innervation to the structures of the eye, including the cornea, ciliary body, lacrimal gland, and conjunctiva. It also supplies nerves to the part of the mucous membrane of the nasal cavity, and to the skin of the eyelids, eyebrow, forehead, and nose.

What does lacrimal nerve do?

The lacrimal nerve provides sensory innervation to the lacrimal gland, conjunctiva of the lateral upper eyelid and superior fornix, the skin of the lateral forehead, scalp and lateral upper eyelid.

What is nasociliary nerve branch of?

The nasociliary nerve is the intermediate branch of the ophthalmic division of the trigeminal nerve.

What are the two branches of the infratrochlear nerve?

The main trunk of the infratrochlear nerve emerges from the orbit dorsomedially and divides into two branches, the dorsal or cornual branch and the medial or frontal branch. The cornual branch soon divides, one division coursing to the dorsal aspect of the base of the horn and ramifying dorsally and dorsomedially.

Where does the infraorbital nerve exit the foramen?

The maxillary nerve exits the infraorbital foramen where it terminates as the infraorbital nerve. The infraorbital nerve is a pure sensory nerve and innervates the lower eyelid, lateral aspect of the nose, upper lip, upper incisor, canine, premolars, and mesiobuccal root of the first molar on the ipsilateral side of the face.

Where is the infratrochlear nerve located in a dog?

The infratrochlear nerve can be blocked as it runs through the trochlear notch located medially on the dorsal orbital rim ( Figs. 1-28 and 1-34 ). The notch can be palpated. Dehorning or disbudding of ruminants is routinely performed to prevent damage to herd mates or handlers.

Where does the supratrochlear nerve provide sensory innervation?

The supratrochlear supplies the superior portion of medial canthus, much of the upper lid, conjunctiva, and forehead. The infratrochlear nerve provides sensory innervation to the skin of the inferior medial canthus and lateral nose, conjunctiva, caruncle, and lacrimal sac.