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Infrahyoid Muscles
Origins, insertions and action of the infrahyoid muscles
10
Anatomy
Graduate
10/30/2011

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Term
Sternohyoid: origin
Definition
post aspect of manubrium,
medial end of clavicle
Term
Sternohyoid: insertion
Definition
body of hyoid
Term
Infrahyoids: action
Definition
depress larynx & hyoid after being elevated during swallowing & speech;
depress hyoid;
furnish stable base for tongue when acting with suprahyoids;
elevate larynx in 1st phase of swallowing;
depress larynx during 2nd phase of swallowing
Term
Omohyoid (sup belly): origin
Definition
body & horn of hyoid
Term
Omohyoid: insertion
Definition
intermediate tendon
Term
Omohyoid (inf belly): origin
Definition
lat and sup border of scapula
Term
Sternothyroid: origin
Definition
post manubrium &
1st costal cartilage
Term
Sternothyroid: insertion
Definition
oblique line on thyroid cartilage
Term
Thyrohyoid: origin
Definition
oblique line of thyroid cartilage
Term
Thyrohyoid: insertion
Definition
lower aspect of greater horn of hyoid
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