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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 ...
The styloglossus muscle is a bilaterally paired muscle of the ... blending with the fibers of the longitudinalis inferior muscle anterior to the hyoglossus muscle. ...
The hypoglossal nerve provides motor control of the extrinsic muscles of the tongue: genioglossus, hyoglossus, styloglossus, and the intrinsic muscles of the tongue. [2] These represent all muscles of the tongue except the palatoglossus muscle, which is innervated by the vagus nerve. [2] The hypoglossal nerve is of a general somatic efferent ...
They are the genioglossus, the hyoglossus (often including the chondroglossus) the styloglossus, and the palatoglossus. Their main functions are altering the tongue's position allowing for protrusion, retraction, and side-to-side movement. [6] The genioglossus arises from the mandible and protrudes the tongue. It is also known as the tongue's ...
The hyoglossus is a thin and quadrilateral extrinsic muscle of the tongue. ... inserting between the styloglossus and the inferior longitudinal muscle of the tongue.
It is situated on the under surface of the tongue between the genioglossus and hyoglossus. [citation needed] It is innervated by the hypoglossal nerve (cranial nerve XII). Its contraction shortens and thickens the tongue.
The tongue is then elevated to the roof of the mouth (by the mylohyoid (mylohyoid nerve—V 3), genioglossus, styloglossus and hyoglossus (the rest XII)) such that the tongue slopes downwards posteriorly. The contraction of the genioglossus and styloglossus (both XII) also contributes to the formation of the central trough.
Genioglossus: hypoglossal nerve: protraction, tongue – extrinsic: Styloglossus: hypoglossal nerve: elevation and retraction, tongue – extrinsic: Hyoglossus: hypoglossal nerve: depresses tongue tongue – extrinsic: Palatoglossus: Pharyngeal plexus, pharyngeal branch of vagus nerve: elevates tongue while swallowing oral cavity floor: Digastric