Branch of the Trigeminal Nerve First

Branch of the trigeminal nerve First

The first branch of the trigeminal nerve (lat. nervus ophthalmicus) is one of three branches of the trigeminal nerve that provide sensory innervation to the face. It is located in the orbit and passes through the orbit, where it innervates the eyeball and its structures.

The first branch of the trigeminal nerve begins at the base of the skull and exits through the upper part of the orbit. It is divided into three branches: nasal, frontal and ophthalmic. The nasal branch innervates the nasal mucosa, the frontal branch innervates the skin of the forehead and upper part of the face, and the ophthalmic branch supplies the eyeball, lacrimal sac, conjunctiva, and cornea.

The trigeminal nerve branch is an important structure for facial sensation, as it provides safety and protection from possible injury and infection. It is also involved in regulating eye temperature and moisture, which is important for eye health and vision.

In addition, the first branch of the trigeminal nerve is important in medicine and surgery. It can be used as a guide when performing operations on the eyeball and other facial structures, as well as in diagnosing diseases associated with this branch of the trigeminal nerve.

Overall, the first branch of the trigeminal nerve is an important structure for providing sensory innervation to the face and plays an important role in eye safety and health.

Name anatomical Characteristics makes up a significant part of the cranial cavity, descends into the infratemporal fossa and through the inferior orbital fissure enters the face, where it participates in the formation of the Zenker canal and innervates the upper lip, buccal mucosa, forehead and forehead skin

The superior orbital fissure begins above the supraorbital margin and opens anteriorly, directly above the iris and cornea. The length is from the point of exit from the skull to the entrance to the intraorbital space. In newborns, the length is about 40 mm, in adulthood it reaches 58 mm. The entrance and exit are characterized by soft tissue walls of the anterior and lower diverging fissures. The inferior orbital fissure, which is in close proximity to the external auditory canal and lies between the superior orbital and greater palatine canals. Maximum height in the upper part. . Its value is about 49 mm. Exit features are characterized by the presence of the trigeminal canal vein and the middle meningeal artery at the exit site. The main function is reflex. The first branch of the trigeminal nerve plexus is responsible for the innervation of individual areas of the skin of the forehead, eyelid, conjunctiva, mucous membrane, and frontal muscle.