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Glossary of Laryngeal Muscles

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TA
Intrinsic
O: Vocal process of arytenoids
I: Interior ventral surface of thyroid laminae at the angle
M: draws thyroid and arytenoids closer
S: CX recurrent
Adduct-shorter-thicker-stiff-slack
PCA
Intrinsic
O:apex of arytenoids
I: external lamina of cricoid
M: yaw of arytenoids to abduct VF
S: CX recurrent
abduct-lengthen-thin-stiff-stiff
LCA
Intrinsic
O: apex of arytenoids
I: rostral lateral surface of crioid
M: adduction of vocal lig
S: CX recurrent
adduct-lenthen-thin-stiff-stiff
IA
Intrinsic
O I: Connects two arytenoids
M: draws vocal ligaments together
S: CX recurrent
adduct-shorten-thick-slack-slack
CT
Intrinsic
O: caudal surface of thyroid lamina
I: ventral rostral surface of cricoid
M: closing of the visor
S: CX superior
adduct-legthen-thin-stiff-stiff
Sternothyroid
Extrinsic
O: oblique line of thyroid
I: sternum at the manubrium
M: caudally
S: CXII + C1-C3
Thyrohyoid
Extrinsic
O:oblique line of thyroid
I:hyoid bone
M: bothways?
S: CXII + C1
Inf. Pharyngeal Constrictor
Extrinsic
O: midline pharyngeal raphe or aponeurosis
I: dorsal borders of thyroid and cricoid
M:assists laryngeal closure for swallowing
S: CIX + CX pharyngeal plexus
Anterior Digastric
Supplemental-suprahyoid
O: mandibular symphis
I: intermediate tendon lateral to hyoid bone
M: draws hyoid bone and larynx rostrally
S: CV trigeminal
Geniohyoid
Supplemental- suprahyoid
O: ventral hyoid
I: mandible
M: draws hyoid bone and larynx rostrally
S: CXII hypoglossal +C1
Posterior Digastric
Supplemental- suprahyoid
O: mastoid process of temporal bone
I: intermediate tendon lateral to hyoid bone
M: draws hyoid bone and larynx rostrally
S: CVII facial
Stylohyoid
Supplemental- suprahyoid
O: hyoid bone
I: styloid process
M: draws hyoid bone and larynx rostrally
S: CVII facial
Hyoglossus
Supplemental- suprahyoid
O:greater cornu of hyoid bone
I: lateral margins of the tongue
M: draws the hyoid bone and larynx rostrally
S: CXII hypoglossal
Sternohyoid
Supplemental- infrahyoid
O: ventral hyoid
I: manubrium of sternum
M: draws hyoid and larynx caudally
S: CXII hyoglossal + C1-C3
Omohyoid
Supplemental- infrahyoid
O: rostral hyoid
I: scapula
M: draws hyoid and larynx caudally
S: CXII hyoglossal + C1-C3

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