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Supratrochlear nerve

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Nerve: Supratrochlear nerve
Gray784
Sensory areas of the head, showing the general distribution of the three divisions of the fifth nerve. (Supratrochlear nerve labeled at upper left.)
Gray776
Nerves of the orbit. Seen from above. (Supratrochlear nerve visible near top.)
Latin nervus supratrochlearis
Gray's subject #200 888
Innervates
From Frontal nerve
To
MeSH [1]

The supratrochlear nerve, smaller than the Supraorbital nerve, passes above the pulley of the Superior oblique, and gives off a descending filament, to join the infratrochlear branch of the nasociliary nerve.

It then escapes from the orbit between the pulley of the Superior oblique and the supraorbital foramen, curves up on to the forehead close to the bone, ascends beneath the Corrugator and Frontalis, and dividing into branches which pierce these muscles, it supplies the skin of the lower part of the forehead close to the middle line and sends filaments to the conjunctiva and skin of the upper eyelid.

EtymologyEdit

Supratrochlear means "above the trochlea". The term trochlea means "pulley" in Latin. Specifically, the trochlea referred to is a loop inside the orbit of the eye, through which the tendon of the superior oblique muscle passes.

External linksEdit

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

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