Corpus: Incus
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Synonym: anvil
English: , anvil
Definition[Bearbeiten]
The incus, or anvil, is a small bone of the middle ear that is hinged between the malleus (hammer) and stapes (stirrup) and is therefore part of the sound-conducting apparatus. It belongs to the three auditory ossicles (auditory ossicles).
Anatomy[Bearbeiten]
Anatomically, the incus consists of a corpus and two limbs, the crus longum and crus breve respectively. A small bony process, the lenticular process, is located on the long leg (crus longum) of the incus. It articulates with the caput stapedis of the stapes and together they form the articulatio incudostapedia (incus-stapes joint).
The incus is connected to the malleus via the incudomallear articulation. The incus is attached to the wall of the tympanic cavity via two small fibre structures:
- Ligamentum incudis posterius
- Ligamentum incudis superius