The Sphenomandibularis is a muscle attaching to the sphenoid bone and the mandible.[1][2] It is a muscle of mastication.[3] Unlike most of the muscles of the human body, which had been categorized several centuries ago, Sphenomandibularis was discovered in the mid-1990s at the University of Maryland at Baltimore.[4][5] The findings were published in 1996. Sphenomandibularis is considered by many sources to be a portion of the temporalis, rather than a distinct muscle.[4][6][7]


  1. Dunn GF, Hack GD, Robinson WL, Koritzer RT (1996). "Anatomical observation of a craniomandibular muscle originating from the skull base: the sphenomandibularis". Cranio. 14 (2): 97–103, discussion 104–5. PMID 8949864.
  2. "Sphenomandibularis". Retrieved 2008-03-10.
  3. Geers C, Nyssen-Behets C, Cosnard G, Lengelé B (2005). "The deep belly of the temporalis muscle: an anatomical, histological and MRI study". Surg Radiol Anat. 27 (3): 184–91. doi:10.1007/s00276-004-0306-3. PMID 15821860.
  4. "Hack's anatomy - Gary Hack claims to have discovered a new facial muscle that others claim is part of the temporalis muscle - The Top Science Stories of 1996 - Brief Article | Discover | Find Articles at BNET.com". Archived from the original on 2007-02-23. Retrieved 2008-03-10.
  5. Leary, Warren E. (1996-02-13). "Revision for Gray's Anatomy? New Muscle Found Deep in Skull". New York Times. Retrieved 2009-11-02.
  6. Türp JC, Cowley T, Stohler CS (1997). "Media hype: musculus sphenomandibularis". Acta Anat (Basel). 158 (2): 150–4. doi:10.1159/000147925. PMID 9311425.
  7. "Chapter 11: The Muscular System". Archived from the original on 2007-12-15. Retrieved 2008-03-10.

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