Infrahyoid muscles

Source: Wikipedia, the free encyclopedia.

Infrahyoid muscles
Depress the hyoid bone
Identifiers
LatinMusculi infrahyoidei
TA98A04.2.04.001
TA22167
FMA71298
Anatomical terms of muscle]

The infrahyoid muscles, or strap muscles, are a group of four pairs of muscles in the anterior (frontal) part of the neck.[1] The four infrahyoid muscles are the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles.[1]

Excluding the sternothyroid, the infrahyoid muscles either

insert on to the hyoid bone.[2]

The term infrahyoid refers to the region below the

stylopharyngeus muscle is considered by many to be one of the strap muscles,[citation needed
] but is not an infrahyoid muscle.

Individual muscles

The

insertion and innervation of the individual muscles:[3]

Muscle Origin Insertion Innervation
Sternohyoid Posterior surface of
manubrium sterni, adjoining parts of clavicle and the posterior sternoclavicular ligament
 Medial part of lower border of hyoid bone Ansa cervicalis
Sternothyroid Posterior surface of
manubrium sterni and adjoining part of first costal cartilage
 Oblique line of thyroid cartilage Ansa cervicalis
Thyrohyoid Oblique line of the thyroid cartilage Lower border of the body and the
greater cornu
of the hyoid bone		 Cervical spinal nerve 1 via the hypoglossal nerve
Omohyoid (superior belly) Intermediate tendon Hyoid bone
Superior root of ansa cervicalis (C1
)
Omohyoid (inferior belly)
Superior border of scapula
 Intermediate tendon Ansa cervicalis (C1-C3)

Nerve supply

All of the infrahyoid muscles are innervated by the

cervical spinal nerve travelling with the hypoglossal nerve.[1]

Function

The infrahyoid muscles function to elevate and depress the hyoid bone and larynx during swallowing and speech.[6] This moves the larynx as one unit.[7]

See also

References

  1. ^
    ISBN 9780123742476
    .
  2. ^ KenHub. "Infrahyoid muscles". Retrieved 24 May 2019.
  3. ISBN 0-443-07168-3
    .
  4. ISBN 978-0-12-410390-0
  5. ISBN 978-0-12-374247-6
  6. S2CID 80855923
  7. ISBN 978-0-323-56930-9
Retrieved from "https://en.wikipedia.org/w/index.php?title=Infrahyoid_muscles&oldid=1131483891"