[1] It arises midway between the base and apex of the orbit[2] where the frontal nerve splits into said terminal branches.

[1] The supratrochlear nerve passes medially[3] above the trochlea of the superior oblique muscle.

[1] It may also provide sensory innervation to part of the periosteum of the frontal bone.

[5] The supratrochlear nerve is named for its passage above the trochlea of the superior oblique muscle.

[2] This article incorporates text in the public domain from page 888 of the 20th edition of Gray's Anatomy (1918)