Hyoid Muscles Flashcards
Name the muscles superior to the hyoid bone
Mylohyoid
Geniohyoid
Stylohyoid
Digastric (anterior and posterior belly)
What are the general actions of the suprahyoids?
Sup attach fixed: elevate hyoid bone
Hyoid fixed: assist in depressing the mandible
Mylohyoid
Sup attach: mandible
Inf attach: hyoid bone
Big muscle, broad
Geniohyoid
Sup attach: mandible
Inf attach: hyoid bone
Stylohyoid
Sup attach: styloid process of temporal bone (part of skull)
Inf attach: hyoid bone
Digastric
Anterior belly:
Sup attach - inferior border of mandible
Inf attach - intermediate tendon of hyoid (via a connective tissue loop)
Posterior belly:
Sup attach - mastoid process (medial side)
Inf attach - intermediate tendon to hyoid (via connective tissue loop)
Which muscles are inferior to hyoid bone?
Sternohyoid
Sternothyroid
Thyrohyoid
Omohyoid (superior and inferior belly)
What action do the infrahyoids do?
Depress the hyoid bone during speech
Sternohyoid
Sup attach: hyoid bone
Inf attach: manubrium
Sternothyroid
Sup attach: thyroid cartilage
Inf attach: manubrium
Thyrohyoid
Sup attach: hyoid bone
Inf attach: thyroid cartilage
Omohyoid
Two bellies connected by an intermediate tendon
Superior belly:
Sup attach - hyoid bone
Inf attach- intermediate tendon
Inferior belly:
Sup attach - intermediate tendon
Inf attach - superior border of scapula near suprascapular notch
