Everything about The Genioglossus totally explained
The
genioglossus is a
muscle of the
human body which runs from the chin to the
tongue.
Structure
Genioglossus is the fan-shaped extrinsic tongue muscle that forms the majority of the body of the
tongue. Its origin is the
mental spine of the
mandible and its insertions are the
hyoid bone and the dorsum of the tongue. Innervated by the
hypoglossal nerve (CN XII), it depresses and protrudes the tongue.
Clinical relevance
A relaxation of the genioglossus and
geniohyoideus muscles, especially during
REM sleep, is implicated in
Obstructive Sleep Apnea (OSA.)
Peripheral damage to the hypoglossal nerve can result in deviation of the tongue to the damaged side.
Etymology
The name derives from Greek roots: "Geneion" for
chin, and "glossa" for tongue.
Additional images
Image:Gray177.png|Mandible. Inner surface. Side view.
Image:Gray513.png|The internal carotid and vertebral arteries. Right side.
Image:Gray794.png|Hypoglossal nerve, cervical plexus, and their branches.
Image:Gray994.png|Sagittal section of nose, mouth, pharynx, and larynx.
Further Information
Get more info on 'Genioglossus'.
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