MUSCULUS STAPEDIUS Meaning and
Definition
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Musculus stapedius, also known as the stapedius muscle, is a small skeletal muscle located in the middle ear. It originates from the posterior wall of the tympanic cavity, which is located within the temporal bone, specifically the pyramidal eminence. The muscle extends forward and attaches to the neck of the stapes bone, a key ossicle in the auditory system.
The primary function of the musculus stapedius is to regulate the vibration of the stapes bone. This muscle plays a crucial role in the protection of the inner ear, preventing damage from loud sounds. When the musculus stapedius contracts, it pulls the stapes bone away from the oval window, which is a structure that separates the middle ear from the inner ear. This action dampens the transfer of sound vibrations to the inner ear, reducing the intensity of the sound.
In addition to its protective function, the musculus stapedius is involved in the acoustic reflex. This reflex, also known as the stapedius reflex, occurs when loud sounds stimulate the cochlear nerve. The musculus stapedius contracts reflexively in response to this stimulation, further reducing the transmission of sound to the inner ear.
Overall, the musculus stapedius is a crucial component of the auditory system, contributing to the protection and regulation of sound vibrations within the middle ear.
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Origin, under surface of the pyramid; insertion, neck of the stapes; action, drawn head of stapes backward.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for MUSCULUS STAPEDIUS
- musculus stapedits
- musculus stapediu3
- musculus stapediuc
- musculus stapediuq
- musculus stapediur
- m usculus stapedius
- mu sculus stapedius
- mus culus stapedius
- musc ulus stapedius
- muscu lus stapedius
- muscul us stapedius
- musculu s stapedius
- musculus s tapedius
- musculus st apedius
- musculus stape dius
- musculus staped ius
- musculus stapedi us
- musculus stapediu s
Etymology of MUSCULUS STAPEDIUS
The word "musculus stapedius" is a Latin term. The etymology of this term can be understood by breaking it down into its components:
1. Musculus: This is the Latin word for "muscle".
2. Stapedius: This comes from the Latin word "stapes", meaning "stirrup", which refers to the stirrup-shaped bone in the middle ear. The suffix "-ius" is used in Latin to denote belonging or connection, thus "stapedius" refers to the muscle connected to the stapes bone.
Therefore, "musculus stapedius" can be translated as "stirrup muscle" in English, indicating its association with the stapes bone.
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