Incus

From Wikipedia, the free encyclopedia

Bone: Incus
Left incus. A. From within. B. From the front.
Auditory tube, laid open by a cut in its long axis.
Bones and muscles in the tympanic cavity in the middle ear
Gray's subject #231 1044
Precursor 1st branchial arch[1]
MeSH Incus
For the record label, see Incus Records.

The incus or anvil is the anvil-shaped small bone or ossicle in the middle ear. It connects the malleus to the stapes. It was first described by Alessandro Achillin of Bologna.

The incus only exists in mammals, and is derived from a reptilian upper jaw bone, the quadrate bone.

Head and neck of a human embryo eighteen weeks old, with Meckel’s cartilage and hyoid bar exposed.

External and middle ear, opened from the front. Right side.

Chain of ossicles and their ligaments, seen from the front in a vertical, transverse section of the tympanum.

Ossicles

  1. ^ Embryology at UNC hednk-023


v • d • e
Sensory system: Auditory system
Outer ear: Pinna (Helix, Antihelix, Tragus, Antitragus, Earlobe) - Ear canal

Middle ear: Eardrum - Ossicles (Malleus, Incus & Stapes) - Stapedius - Tensor tympani - Eustachian tube (Torus tubarius)

Inner ear/Labyrinth: Bony labyrinth - Membranous labyrinth - Cochlea (Cochlear duct, Scala vestibuli, Scala media & Scala tympani) - Oval window - Helicotrema - Round window - Basilar membrane - Reissner's membrane - Organ of Corti - Hair cells - Stereocilia - Sulcus spiralis externus - Sulcus spiralis internus - Tectorial membrane - Vestibule

Brain: Cochlear nerve VIII → Cochlear nuclei → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → Primary auditory cortex
 This musculoskeletal system article is a stub. You can help Wikipedia by expanding it.
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