Supratrochlear nerve

Supratrochlear nerve is a branch of the ophthalmic nerve, which is itself a branch of the trigeminal nerve. It is smaller than the supraorbital nerve, and exits the orbit between the pulley of the superior oblique and the supraorbital nerve.

Anatomy

The supratrochlear nerve passes above the pulley of the superior oblique, and gives off a descending filament that joins the infratrochlear branch of the nasociliary nerve. It then exits the orbit between the pulley of the superior oblique and the supraorbital nerve, and divides into two branches.

Function

The supratrochlear nerve supplies the skin of the lower part of the forehead and the upper eyelid. It also sends a filament to the palpebral branch of the lacrimal nerve.

Clinical significance

Damage to the supratrochlear nerve can result in a loss of sensation in the area it supplies. This can occur due to trauma, surgery, or conditions such as neuropathy.

See also

• Ophthalmic nerve
• Trigeminal nerve
• Supraorbital nerve

References

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