Mental spine

Jump to: navigation, search
Mental spine
The posterior aspect of the mandible showing the mental spine.
A medial view of the mandible showing the attachments of geniohyoid and genioglossus.
Latin spinae mentalis
Gray's subject #44 172

The mental spine is a small projection of bone on the posterior aspect of the mandible (jaw bone) in the midline. It is also known as the genial tubercle[1], genial apophysis and the Latin name spinae mentalis. The mental spine is the point of insertion of the geniohyoid muscle[2], one of the suprahyoid muscles and the origin of the genioglossus muscle, one of the muscles of the tongue.


  1. "Genial tubercle." The American Heritage Stedman's Medical Dictionary. Houghton Mifflin Company, 2002. Accessed: 22 Oct. 2007.
  2. "Genial tubercle." Mosby's Dental Dictionary. Elsevier, Inc., 2004. Accessed: 22 Oct. 2007.