Incus

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Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology

Bone: Incus
File:Gray917.png
Left incus. A. From within. B. From the front.

Auditory tube, laid open by a cut in its long axis.
Gray's	subject #231 1044
MeSH	A09.246.397.247.362

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.

Additional images


Tympanic cavity	Labyrinthine wall/medial: Oval window · Round window • Secondary tympanic membrane • Prominence of facial canal • Promontory of tympanic cavity Membranous wall/lateral Mastoid wall/posterior: Mastoid cells • Aditus to mastoid antrum • Pyramidal eminence Carotid wall/anterior Tegmental wall/roof: Epitympanic recess Jugular wall/floor
Ossicles	Malleus (Neck of malleus, Superior ligament of malleus, Lateral ligament of malleus, Anterior ligament of malleus) · Incus (Superior ligament of incus, Posterior ligament of incus) · Stapes (Anular ligament of stapes)
Muscles	Stapedius · Tensor tympani
Eustachian tube	Bony part of pharyngotympanic tube · Cartilage of pharyngotympanic tube (Torus tubarius)