Written by Max Bidewell

Last updated January 17, 2023 • 6 Revisions •

The genioglossus is an extrinsic muscle of the tongue. It is a large, thick muscle, which contributes significantly to the shape of the tongue.

  • Attachments: Arises from the mandibular symphysis. It inserts onto the body of the hyoid bone and the entire length of the tongue.
  • Function: Protrusion (‘sticking the tongue out’) and depression of the tongue.
  • Innervation: Hypoglossal nerve.
  • Blood supply: Lingual artery with contributions from the tonsillar artery.

Fig 1
The extrinsic muscles of the tongue. Note the palatoglossus muscle is not included in this illustration.

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