The arytenoid is an intrinsic muscle of the larynx. It has both oblique and transversly orientated fibres.
- Attachments: Spans from one arytenoid cartilage to the opposite arytenoid.
- Actions: Adduction of the arytenoid cartilages, narrowing the laryngeal inlet
- Innervation: Inferior laryngeal nerve (branch of recurrent laryngeal)
- Blood supply: branches of the superior and inferior thyroid arteries (laryngeal branches)