Gross Anatomy Unit 3: Eye and Larynx Muscle Movements

superior rectus

elevate, adduct, and medially rotate

inferior oblique

elevate, abduct, and laterally rotate

superior oblique

depress, abduct, and medially rotate

inferior rectus

depress, adduct, and laterally rotate

lateral rectus

abduct

medial rectus

adduct

levator palpebrae superioris

elevates upper eyelid

posterior cricoarytenoid

abducts vocal folds, widens aperture for inhalation

lateral cricoarytenoid

adducts vocal folds, narrows aperture for whispering

Transverse and oblique arytenoids

adducts vocal folds to bring cord together for sound production

thyroarytenoid and vocalis

Loosen cords, lower pitch by decreasing tension of vocal ligaments

cicothyroid

stretch vocal cords to increase pitch by tensing vocal ligaments