Lateral cricoarytenoid muscle
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| Lateral cricoarytenoid | ||
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| Muscles of larynx. Side view. Right lamina of thyroid cartilage removed. | ||
| Latin | musculus cricoarytenoideus lateralis | |
| Gray's | subject #236 1082 | |
| Origin: | lateral part of the arch of the cricoid | |
| Insertion: | muscular process of the arytenoid cartilage | |
| Artery: | ||
| Nerve: | recurrent laryngeal branch of the vagus | |
| Action: | adduct and medially rotate the cartilage, pulling the vocal ligaments towards the midline and backwards and so closing off the rima glottidis | |
| Antagonist: | Posterior cricoarytenoid muscle | |
| Dorlands/Elsevier | m_22/12548688 | |
The lateral cricoarytenoid muscles extend from the lateral cricoid cartilage to the ipsilateral arytenoid cartilage. By rotating the arytenoid cartilages medially, these muscles adduct the vocal cords and thereby close the rima glottidis, protecting the airway. (Their action is antagonistic to that of the posterior cricoarytenoid muscles.) The lateral cricoarytenoid muscles receive innervation from the recurrent laryngeal branch of the vagus nerve (CN X).
[edit] Additional images
 Muscles of the larynx, seen from above. |
[edit] See also
[edit] External links
- LUC lcri
- Atlas of anatomy at UMich rsa4p3
- Dictionary at eMedicine Lateral+cricoarytenoid+muscle
- Norman/Georgetown lesson11 (larynxlatcricoary)
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scalp/eyelid: occipitofrontalis (occipitalis, frontalis) - orbicularis oculi - corrugator supercilii - depressor supercilii
extraocular: levator palpebrae superioris - superior tarsal - rectus (superior, inferior, medial, lateral) - oblique (superior, inferior) - intraocular: ciliary - iris dilator - iris sphincter
ear: auriculares - temporoparietalis - stapedius - tensor tympani
nose: procerus - nasalis (dilatator naris) - depressor septi nasi - levator labii superioris alaeque nasi
mouth: levator anguli oris/depressor anguli oris - levator labii superioris/depressor labii inferioris - zygomaticus (major, minor) - mentalis - buccinator - orbicularis oris - risorius
mastication: masseter - temporalis - pterygoid (lateral, medial)
tongue: extrinsic (genioglossus - hyoglossus - chondroglossus - styloglossus) intrinsic (superior longitudinal - inferior longitudinal - transversus - verticalis)
soft palate: levator veli palatini - tensor veli palatini - musculus uvulae - palatoglossus - palatopharyngeus
pharynx: pharyngeal constrictor (inferior, middle, superior) - stylopharyngeus - salpingopharyngeus
larynx: cricothyroid - posterior cricoarytenoid - lateral cricoarytenoid - arytenoid - thyroarytenoid
