This site is targeted at medical and radiology professionals, contains user contributed content, and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

Incus

Dr Frank Gaillard et al.

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.