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Fibrous Loop of Digastric Muscle (Left)
Muscular System

Fibrous Loop of Digastric Muscle (Left)

Ansa fibrosa musculi digastrici

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Structure/Morphology

A fibrous loop of connective tissue surrounds the intermediate tendon of digastric muscle.

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Anatomical Relations

The fibrous loop attaches to the anterior aspect of the body of the hyoid bone and often penetrates the insertion of stylohyoid muscle (Kim and Loukas, 2019).

Function

The fibrous loop attaches the intermediate tendon of digastric muscle to the hyoid bone allowing it to elevate. If the hyoid bone is fixed by contraction of the infrahyoid, contraction of digastric will cause depression of the mandible (Netter, 2011).

References

Kim, S. D. and Loukas, M. (2019) 'Anatomy and variations of digastric muscle', Anatomy & cell biology, 52(1), pp. 1-11.

Netter, F. H. (2011) Atlas of Human Anatomy. Netter Basic Science Series: Saunders/Elsevier.

Learn more about this topic from other Elsevier products

Digastric Muscle

ScienceDirect image

The digastric muscle is a paired muscle that inserts on the mastoid process, part of the temporal bone behind the ear, and the suture that joins the two halves of the lower jaw.

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