Corpus: Infrahyoid muscles
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Synonym: lower hyoid muscles, infrahyoid muscles
English:
Definition[Bearbeiten]
The term infrahyoid musculature refers to the skeletal muscles that attach to the hyoid bone (os hyoideum) from the caudal side, i.e. are located below (inferior) to the hyoid bone.
The muscles above the hyoid bone are referred to as suprahyal muscles.
Classification[Bearbeiten]
The following muscles belong to the infrahyal musculature:
- omohyoid muscle
- sternohyoid muscle
- sternothyroid muscle
- thyrohyoid muscle
A levator glandulae thyroideae muscle may also be present inconstantly.
Function[Bearbeiten]
The infrahyal musculature pulls the hyoid bone downwards or fixes it and supports the act of swallowing. The omohyoid muscle also stretches the cervical fascia with its intermediate tendon and keeps the internal jugular vein open.
Innervation[Bearbeiten]
The infrahyal muscles are innervated via the cervical profunda from the cervical plexus (segments: C1 to C3).