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The incus is the middle of the ossicles articulating with both the malleus laterally and the stapes medially.
Its parts include:
- a body which articulates with the head of the malleus, and to which the superior ligament of the incus is attached (to the roof of the middle ear cavity)
- a long crus down to the lentiform process (lenticular process) which articulates with the stapes
- a short crus to which the posterior ligament of the incus is attached
The long crus is the most frequently eroded part of any of the ossicles.
- Last's Anatomy - 10th Edition - Chummy S Sinnatamby
- Clemete's Anatomy - Regional Atlas of the Human Body - 3rd Edition
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