The infratrochlear nerve is a branch of the nasociliary nerve (itself a branch of the ophthalmic nerve (CN V1)) in the orbit. It exits the orbit inferior to the trochlea of superior oblique. It provides sensory innervation to structures of the orbit and skin of adjacent structures. [1]: 631, 783
Infratrochlear nerve | |
---|---|
Details | |
From | Nasociliary nerve |
Innervates | Skin of eyelids, conjunctiva, lacrimal sac, lacrimal caruncle, side of nose above medial canthus |
Identifiers | |
Latin | nervus infratrochlearis |
TA98 | A14.2.01.035 |
TA2 | 6214 |
FMA | 52693 |
Anatomical terms of neuroanatomy |
The nasociliary nerve terminates by bifurcating into the infratrochlear and the anterior ethmoidal nerves. 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. [2][ verification needed]
The infratrochlear nerve provides sensory innervation to the skin of the eyelids, the conjunctiva, lacrimal sac, lacrimal caruncle, and the side of the nose superior to the medial canthus. [1]: 631, 783
The infratrochlear nerve receives a descending communicating branch from the supratrochlear nerve. [1]: 782
The infratrochlear nerve is named after a structure it passes under. Infratrochlear means "below the trochlea". The term trochlea means "pulley" in Latin. Specifically, the trochlea refers to a fibrocartilaginous loop at the superomedial surface of the orbit called the trochlea, through which the tendon of the superior oblique muscle passes.
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cite book}}
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The infratrochlear nerve is a branch of the nasociliary nerve (itself a branch of the ophthalmic nerve (CN V1)) in the orbit. It exits the orbit inferior to the trochlea of superior oblique. It provides sensory innervation to structures of the orbit and skin of adjacent structures. [1]: 631, 783
Infratrochlear nerve | |
---|---|
Details | |
From | Nasociliary nerve |
Innervates | Skin of eyelids, conjunctiva, lacrimal sac, lacrimal caruncle, side of nose above medial canthus |
Identifiers | |
Latin | nervus infratrochlearis |
TA98 | A14.2.01.035 |
TA2 | 6214 |
FMA | 52693 |
Anatomical terms of neuroanatomy |
The nasociliary nerve terminates by bifurcating into the infratrochlear and the anterior ethmoidal nerves. 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. [2][ verification needed]
The infratrochlear nerve provides sensory innervation to the skin of the eyelids, the conjunctiva, lacrimal sac, lacrimal caruncle, and the side of the nose superior to the medial canthus. [1]: 631, 783
The infratrochlear nerve receives a descending communicating branch from the supratrochlear nerve. [1]: 782
The infratrochlear nerve is named after a structure it passes under. Infratrochlear means "below the trochlea". The term trochlea means "pulley" in Latin. Specifically, the trochlea refers to a fibrocartilaginous loop at the superomedial surface of the orbit called the trochlea, through which the tendon of the superior oblique muscle passes.
{{
cite book}}
: CS1 maint: location missing publisher (
link)
{{
cite book}}
: CS1 maint: location missing publisher (
link) CS1 maint: others (
link)