Malleus

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Bone: Malleus
Left malleus. A. From behind. B. From within.
The right membrana tympani with the hammer and the chorda tympani, viewed from within, from behind, and from above. (Malleus visible at center.)
Malleus Tensor Tympani Incus Stapedius Labyrinth Stapes Auditory Canal Tympanic Membrane (Ear Drum) Eustachian Tube Tympanic cavity
Bones and muscles in the tympanic cavity in the middle ear
Gray's	subject #231 1044
Precursor	1st branchial arch[1]
MeSH	Malleus

The malleus or hammer is a hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum. The word is Latin for hammer.

It transmits the sound vibrations from the eardrum to the incus.

The malleus is unique to mammals, and evolved from a lower jaw bone in basal amniotes called the articular, which still forms part of the jaw joint in reptiles.^{[citation needed]}

Additional images

Illu auditory ossicles.jpg Ossicles

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.

See also

• Bone terminology
• Terms for anatomical location

References

1. ↑ Embryology at UNC hednk-023

External links

The Anatomy WizMalleus

v • d • e Sensory system: Auditory and Vestibular systems
Outer ear	pinna (Helix, Antihelix, Tragus, Antitragus, Earlobe) • Ear canal
Middle ear	Eardrum (Umbo) • Ossicles (Malleus, Incus & Stapes) • muscles (Stapedius, Tensor tympani) • Eustachian tube (Torus tubarius)
Inner ear/Labyrinth	Bony labyrinth (Vestibule) • Membranous labyrinth Oval window • Helicotrema • Round window Cochlea: Spiral ganglion • Modiolus • Cochlear duct/scala media (Endolymph, Stria vascularis, Spiral ligament, Organ of Corti) • Scala vestibuli and Scala tympani (Perilymph) Reissner's/vestibular membrane • Basilar membrane • Tectorial membrane Organ of Corti: Hair cells • Stereocilia • Sulcus spiralis (externus, internus) • Limbus spiralis
Vestibular system	Static/translations: Utricle (Macula) - Saccule (Macula, Endolymphatic sac, Endolymphatic duct) - Kinocilium - Otolith Kinetic/rotations: Semicircular canals (Superior, Posterior, Horizontal) • Cupula • Ampullae (Crista ampullaris)
Brain (auditory)	Cochlear nerve VIII → Cochlear nuclei → Trapezoid body → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → Primary auditory cortex

v • d • e Bones (Axial skeleton, Appendicular skeleton)
VERTEBRAL COLUMN	vertebrae (cervical - thoracic - lumbar) - sacrum - coccyx
THORAX	sternum - rib
cranial bones of SKULL	occipital - parietal - frontal - temporal - sphenoid - ethmoid
facial bones of SKULL	nasal - maxilla - lacrimal - zygomatic - palatine - inferior nasal conchae - vomer - mandible - THROAT: hyoid (greater cornu, lesser cornu, body)
UPPER EXTREMITY	SHOULDER GIRDLE:clavicle - scapula - ARM: humerus - ulna - radius- HAND:carpals (scaphoid - lunate bone - triquetral - pisiform - trapezium - trapezoid - capitate - hamate) - metacarpals - phalanges (prox - int - dist)
LOWER EXTREMITY	PELVIS:pelvis (ilium, ischium, pubis) - LEG: femur - patella - fibula - tibia - FOOT: tarsals (calcaneus - talus - navicular - cuneiform - cuboid ) - metatarsals - phalanges (prox - int - dist)
MIDDLE EAR OSSICLES	malleus - incus - stapes

ca:Martell (os)

da:Hammer (knogle) de:Hammer (Anatomie)id:Tulang martil it:Martello (anatomia) la:Malleus (os) nl:Hamer (gehoorbeentje)fi:Vasaraluu

Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .