COMD 320 anatomy of phonation

tracheostomy

incision in the trachea that forms a temporary or permanent opening

stoma

opening made in a tracheostomy; usually vertical incision between 2nd and 4th tracheal ring

2 portions of thyroarytenoid muscle

thyrovocalis; thyromuscularis

intrinsic laryngeal muscles

both origin and insertion within the larynx

extrinsic laryngeal muscles

one attachment in the larynx and the other outside the larynx

lateral cricoarytenoid

-adductor
-attachments: cricoid & muscular process of arytenoid
-innervation: RLN of CN 10 (vagus)

transverse arytenoid

-adductor
-attachments: post. surface of 1 arytenoid; post. surface of other arytenoid
-innervation: RLN of CN 10 (vagus)

oblique arytenoid

-adductor
-attachments: muscular process of arytenoids; apex of opposite arytenoid
-innervation: RLN of CN 10 (vagus)

posterior cricoarytenoid

-abductor
-attachments: post. cricoid; muscular process of arytenoid
-innervation: RLN of CN 10

thyrovocalis

-medial thyroarytenoid
-tensor
-attachments: thyroid; arytenoid vocal process
-innervation: RLN of CN 10

cricothyroid (pars recta)

-tensor
-attachments: cricoid; thyroid
-innervation: RLN of CN 10

cricothyroid (pars oblique)

-tensor
-attachments: cricoid; thyroid
-innervation: RLN of CN 10

thyromuscularis (lateral thyroarytenoid)

-relaxer
-attachments: thyroid; muscular process of arytenoid
-innervation: RLN of CN 10

superior thyroarytenoid

-relaxer
-attachments: thyroid; muscular process of arytenoid
-innervation: RLN of CN 10

stylohyoid

-elevator
-attachments: styloid process; hyoid
-innervation: CN 7 (facial)

mylohyoid

-elevator
-attachments: lateral mandible; hyoid
-innervation: CN 5 (trigeminal)

geniohyoid

-elevator
-attachments: middle mandible; hyoid
-innervation: CN 12 (hypoglossal)

genioglossus

-elevator
-attachments: mandible; tongue and hyoid
-innervation: CN 12 (hypoglossal)

hyoglossus

-elevator
-attachments: hyoid; lateral side of tongue
-innervation: CN 12 (hypoglossal)

inferior pharyngeal constrictor

-elevator
-attachments: thyroid & cricoid; pharyngeal wall
-innervation: RLN of CN 10

digastricus anterior

-elevator
-attachments: middle of mandible; intermediate tendon (hyoid)
-innervation: CN 5 (trigeminal)

digastricus posterior

-elevator
-attachments: mastoid process; intermediate tendon (hyoid)
-innervation: CN 7 (facial)

sternothyroid

-depressor
-attachments: sternum; thyroid
-innervation: spinal nerves

sternohyoid

-depressor
-attachments: sternum; hyoid
-innervation: spinal nerves

omohyoid

-depressor
-attachments: scapula; hyoid
-innervation: spinal nerves

thyrohyoid

-depressor
-attachments: thyroid; hyoid
-innervation: spinal nerves