Incus

The incus is the middle of the ossicles articulating with the head of the malleus anteromedially and the stapes inferomedially.

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 (or process) down to the lentiform process (lenticular process) which articulates with the stapes
  • a short crus (or process) to which the posterior ligament of the incus is attached

The long crus is the most frequently eroded part of any of the ossicles.

History and etymology

Incus is derived from the Latin word incus meaning anvil.

Head and neck anatomy
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Article information

rID: 1497
System: Head & Neck
Section: Anatomy
Tags: stub, refs, cases
Synonyms or Alternate Spellings:

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Cases and figures

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    Figure 1: incus
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    Structures of the...
    Figure 2: anatomy of the middle ear
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    Figure 3: annotated CT
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    Figure 4: middle ear anatomy illustrations
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    Figure 5: middle ear anatomy illustrations
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