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The inferior longitudinal muscle of tongue is an intrinsic muscle of the tongue.[1] 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.
| Inferior longitudinal muscle of tongue | |
|---|---|
 Coronal section of tongue, showing intrinsic muscles. | |
 The mouth cavity. (Longitudinalis inferior labeled at bottom left.) | |
| Details | |
| Origin | Root of tongue |
| Insertion | Apex of tongue |
| Nerve | Hypoglossal nerve (CN XII) |
| Actions | Retracts tongue with superior longitudinal muscle, making tongue short and thick |
| Identifiers | |
| Latin | musculus longitudinalis inferior linguae |
| TA98 | A05.1.04.107 |
| TA2 | 2123 |
| FMA | 46694 |
| Anatomical terms of muscle | |
Structure
editThe inferior longitudinal muscle of the tongue is an intrinsic muscle of the tongue.[1] It is thin and oval in cross-section. It is situated between the paramedian septum, and the lateral septum.[2] It extends from the root to the apex of the tongue. Posteriorly, some of its fibers attach onto the body of the hyoid bone.[citation needed] Anteriorly, its fibres blend with those of the styloglossus, hyoglossus, and genioglossus to form the ventral area of the tip of the tongue.[2]
Innervation
editThe inferior longitudinal muscle of the tongue is supplied by the hypoglossal nerve (CN XII).[3]
Function
editContraciton of the inferior longitudinal muscle of the tongue shortens and thickens the tongue.[2]
Additional images
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References
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This article incorporates text in the public domain from page 1130 of the 20th edition of Gray's Anatomy (1918)
- ^ a b Aggarwal, Annu; Thompson, Philip D. (2011). "44 - Unusual focal dyskinesias". Handbook of Clinical Neurology. Vol. 100. Elsevier. pp. 617–628. doi:10.1016/B978-0-444-52014-2.00044-6. ISBN 978-0-444-52014-2. ISSN 0072-9752. PMID 21496611.
- ^ a b c Dotiwala, Ary K.; Samra, Navdeep S. (2022), "Anatomy, Head and Neck, Tongue", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 29939559, retrieved 2023-01-13
- ^ Love, Russell J.; Webb, Wanda G. (1992). "7 - The Cranial Nerves". Neurology for the Speech-Language Pathologist (2nd ed.). Butterworth-Heinemann. pp. 112–136. doi:10.1016/B978-0-7506-9076-8.50013-7. ISBN 978-0-7506-9076-8.
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