Trigeminal Nerve
Trigeminal nerve
The trigeminal nerve is the fifth of twelve pairs of cranial nerves enervating the face and head, and is denoted by the Roman Numeral V. It has three divisions which enervate the forehead and eye (ophthalmic V1), cheek (maxillary V2) and lower face and jaw (mandibular V3). The trigeminal nerves function in sensing facial touch, pain and temperature, as well as controlling muscles used for chewing. The trigeminal nerve functions should be distinguished from the facial nerve (cranial nerve VII), which controls all other facial movements. The ophthalmic nerve (V1) is one of the three branches of the trigeminal nerve, the fifth cranial nerve. Like the maxillary branch of the trigeminal nerve, the ophthalmic branch carries sensory fibers only.
Branches
• Nasociliary nerve o sensory root of ciliary ganglion o posterior ethmodial nerve o long ciliary nerve o infratrochlear nerve o anterior ethmoidal nerve • lacrimal nerve • frontal nerve o supratrochlear nerve o supraorbital nerve nasociliary nerve
The nasociliary nerve is a branch of the ophthalmic nerve. It is intermediate in size between the two other main branches of the ophthalmic nerve, the frontal nerve and the lacrimal nerve, and is more deeply placed.
The nasociliary nerve enters the orbit between the two heads of the lateral rectus muscles and between the superior and inferior rami of the oculomotor nerve (CN III). It passes across the optic nerve (CN II) and runs obliquely beneath the superior rectus muscle and superior oblique muscle to the medial wall of the orbital cavity. After giving the posterior ethmoidal nerve and anterior ethmoidal nerve, it terminates as the infratrochlear nerve on the medial margin of the orbit.
Branches
The nasociliary nerve gives off the following branches: • posterior ethmoidal nerve • long ciliary nerves • infratrochlear nerve •
The trigeminal nerve is the fifth of twelve pairs of cranial nerves enervating the face and head, and is denoted by the Roman Numeral V. It has three divisions which enervate the forehead and eye (ophthalmic V1), cheek (maxillary V2) and lower face and jaw (mandibular V3). The trigeminal nerves function in sensing facial touch, pain and temperature, as well as controlling muscles used for chewing. The trigeminal nerve functions should be distinguished from the facial nerve (cranial nerve VII), which controls all other facial movements. The ophthalmic nerve (V1) is one of the three branches of the trigeminal nerve, the fifth cranial nerve. Like the maxillary branch of the trigeminal nerve, the ophthalmic branch carries sensory fibers only.
Branches
• Nasociliary nerve o sensory root of ciliary ganglion o posterior ethmodial nerve o long ciliary nerve o infratrochlear nerve o anterior ethmoidal nerve • lacrimal nerve • frontal nerve o supratrochlear nerve o supraorbital nerve nasociliary nerve
The nasociliary nerve is a branch of the ophthalmic nerve. It is intermediate in size between the two other main branches of the ophthalmic nerve, the frontal nerve and the lacrimal nerve, and is more deeply placed.
The nasociliary nerve enters the orbit between the two heads of the lateral rectus muscles and between the superior and inferior rami of the oculomotor nerve (CN III). It passes across the optic nerve (CN II) and runs obliquely beneath the superior rectus muscle and superior oblique muscle to the medial wall of the orbital cavity. After giving the posterior ethmoidal nerve and anterior ethmoidal nerve, it terminates as the infratrochlear nerve on the medial margin of the orbit.
Branches
The nasociliary nerve gives off the following branches: • posterior ethmoidal nerve • long ciliary nerves • infratrochlear nerve •