genioglossus
Sign in to saveAlso known as genioglossus muscle
The genioglossus is one of the paired extrinsic muscles of the tongue. It is a fan-shaped muscle that comprises the bulk of the body of the tongue. It arises from the mental spine of the mandible; it inserts onto the hyoid bone, and the bottom of the tongue. It is innervated by the hypoglossal nerve (cranial nerve XII). The genioglossus is the major muscle responsible for protruding (or sticking out) the tongue.
Key facts
- Muscle.Name
- Genioglossus
- Muscle.Latin
- musculus genioglossus
- Muscle.Image
- Genioglossus.png
- Muscle.Caption
- Extrinsic muscles of the tongue. Left side.
- Muscle.Image2
- File:Slide1ww.JPG
- Muscle.Caption2
- Muscles of the tongue from below, with genioglossus visible at top
- Muscle.Origin
- Superior part of mental spine of mandible (symphysis menti)
- Muscle.Insertion
- Underside of tongue and body of hyoid
- Muscle.Action
- Inferior fibers protrude the tongue, middle fibers depress the tongue, and its superior fibers draw the tip back and down
- Muscle.Blood
- Lingual artery
- Muscle.Nerve
- Hypoglossal nerve
via Wikipedia infobox
Wikidata facts
- Image
- Gray1019.png
Show 1 more fact
- Commons category
- Genioglossus muscles
via Wikidata · CC0
~3 min read
Encyclopedic overview
11 sectionsContents
- Structure
- Origin
- Insertion
- Innervation
- Blood supply
- Function
- Clinical significance
- History
- Other animals
- References
- External links
The genioglossus is one of the paired extrinsic muscles of the tongue. It is a fan-shaped muscle that comprises the bulk of the body of the tongue. It arises from the mental spine of the mandible; it inserts onto the hyoid bone, and the bottom of the tongue. It is innervated by the hypoglossal nerve (cranial nerve XII). The genioglossus is the major muscle responsible for protruding (or sticking out) the tongue.
==Structure== Genioglossus is the fan-shaped extrinsic tongue muscle that forms the majority of the body of the tongue. The muscle is paired, having a left and right portion, which are divided at the midline of the tongue by a septum made of connective tissue.
Excerpted from Wikipedia’s “genioglossus” article, available under the CC BY-SA 4.0 licence.