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ORBIT-SUPERIOR OBLIQUE & TROCHLEA

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ORBIT-SUPERIOR OBLIQUE & TROCHLEA

SUPERIOR OBLIQUE
1. O: body of the sphneoid, above and medial to the tendinous ring.
2. Its slender tendon passes through the trochlea (where it is lubricated by a synovial sheath), passes backwards + laterally to pass underneath the superior rectus.
3. I: inserted into the posterior-superior surface of the sclera, behind the coronal equator.
4. NS: CN IV.
5. A: pulls the eye down + in (complete opposite of what its name implies!)

TROCHLEA
6. Pully of dense fibrous tissue attached to the a small depression (trochlear fovea) or elevation (trochlear spine) on the undersurface of the frontal bone (beneath the frontal sinus), a few millimeters behind the orbital margin.


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REFERENCES

1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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