Where is the infratrochlear nerve located?
The Infratrochlear Nerve Course The infratrochlear nerve runs anteriorly on the upper border of the medial rectus. It receives a branch from the supratrochlear nerve (a branch of the frontal nerve) and moves through the medial aspect of the extraconal space of the orbit inferior to the trochlea.
What area does the infratrochlear nerve affect?
The infratrochlear nerve provides sensory innervation to the skin of the inferior medial canthus and lateral nose, conjunctiva, caruncle, and lacrimal sac. The lacrimal nerve supplies the lacrimal gland, the lateral upper lid and conjunctiva.
Where is the ophthalmic nerve located?
The ophthalmic division of the trigeminal nerve, also referred to as the ophthalmic nerve, is a purely sensory (afferent) nerve. It is the smallest division of the trigeminal nerve. It runs forward in the lateral wall of the cavernous sinus below the oculomotor and trochlear nerves.
What does the infratrochlear nerve supply?
Function. The infratrochlear nerve provides sensory innervation to the skin of the eye lids, the conjunctiva, lacrimal sac, lacrimal caruncle and the side of the nose above the medial canthus.
What is Pterygopalatine ganglion?
The pterygopalatine ganglion (PPG) is one of four parasympathetic ganglia located within the head region, existing as a bilateral pair. The pterygopalatine ganglion may also be referred to as the sphenopalatine ganglion, Meckel’s ganglion, or the nasal ganglion.
What is the zygomatic nerve?
The zygomatic nerve is a branch of the maxillary division of the trigeminal nerve and enters the orbit through the inferior orbital fissure.
What is the nerve of the nose?
The olfactory nerves (cranial nerve I) are unique in that their cell bodies lie in the olfactory epithelium (the surface membrane lining the upper parts of the nasal passages), each sending a nerve fibre back to the brain.
Does the trigeminal nerve affect the eyes?
No. Trigeminal neuralgia (TN), a chronic pain condition caused by pressure on the trigeminal nerve, does not trigger pain directly in the eye itself. It can, however, cause pain around the eye.
Does trigeminal nerve cross?
From the spinal trigeminal nucleus, secondary fibers cross the midline and ascend in the trigeminothalamic (quintothalamic) tract to the contralateral thalamus. Pain-temperature fibers are sent to multiple thalamic nuclei.
What are the three branches of the trigeminal nerve?
It contains the sensory cell bodies of the 3 branches of the trigeminal nerve (the ophthalmic, mandibular, and maxillary divisions).
Where is pterygopalatine ganglion located?
pterygopalatine fossa
Anatomy. The sphenopalatine (pterygopalatine) ganglion resides in the pterygopalatine fossa, located posterior to the middle nasal concha and anterior to the pterygoid canal. It is adjacent to and inferior to the maxillary nerve, a branch of the trigeminal nerve, and connects with it via the pterygopalatine nerves.
How many sphenopalatine ganglion are there?
The Role SPG Ganglion in Migraine Pain The sphenopalatine ganglion (also called the pterygopalatine ganglion) is an extracranial parasympathetic ganglion found in the pterygopalatine fossa. There are two ganglia, one in each of the bilateral fossae.
Where does the infratrochlear nerve enter the body?
The infratrochlear nerve travels anteriorly in the orbit along the upper border of the medial rectus muscle and underneath the trochlea of the superior oblique muscle. It exits the orbit medially and divides into small sensory branches.
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.
Can you use the infratrochlear nerve on a horse?
Most third eyelid procedures can be performed on the standing, sedated horse, although general anesthesia can be performed if deemed necessary. The sensory infratrochlear nerve block provides anaesthesia to the third eyelid and can be used in combination with topical anesthesia.
Where does the sensory innervation of the face take place?
Sensory innervation to the external skin of the face is also done via the trigeminal nerve. The mental nerve is the terminal branch of the inferior alveolar nerve (a branch of the mandibular division of the trigeminal nerve). It exits the mandible via the mental foramen to provide sensation over the chin area.