Diaphragm
Phrenic Nerve
Depresses central tendon
External Intercostal
Elevate ribcage
Internal Intercostal (Interosseous)
Role in expiration
Internal Intercostal (Interchondral)
Elevate ribcage
Innermost Intercostal
Role in expiration
Sternocleidomastoid
Elevates sternum -> ribcage
Lateral Cricoarytenoid
CN X RLN
Adducts vocal folds, increases medial compression
Transverse (Inter) arytenoid
CN X RLN
Adducts vocal folds
Oblique (Inter) arytenoid
CN X RLN
Pulls the apex medially (Adductor)
Posterior cricoarytenoid
CN X RLN
Abducts vocal folds
Cricothyroid Muscles
CN X SLN (external)
Tenses vocal folds; depresses thyroid
Thyrovocalis (Medial)
CN X RLN
Tenses vocal folds
Thyromuscularis (Lateral)
CN X RLN
Relaxes vocal folds
Anterior digastricus
CN V
Up and forward hyoid movement
Depresses mandible
Posterior Digastricus
CN VII
Up and back hyoid movement
Depresses mandible
Stylohyoid
CN VII (motor)
Move hyoid up and posteriorly, causing BOT elevation & elongation of mouth floor
Mylohyoid
CN V (mandibular)
Elevate hyoid; Depress mandible
Elevate oral cavity
Geniohyoid
CN XII
Elevate hyoid; Depresses mandible
Hyoglossus
CN XII
Elevate hyoid; Depresses tongue (sides)
Genioglossus
CN XII
Elevate hyoid
Protrude, retract, and depress tongue; cups tongue
Thyropharyngeus (Inferior Pharyngeal Constrictor)
CN X, CN IX
Constricts pharynx, elevates larynx
Sternohyoid
Ansa cervicalis (1-3)
Depresses hyoid
Omohyoid
Ansa cervicalis (1-3)
Depresses hyoid
Sternothyroid
CN XII, Spinal C1-2
Depresses thryoid cartilage