Extrinsic Muscles of the Tongue

Question 1

Hyoglossus

Answer 1

Origin: greater horn of the hyoid bone

Insertion: lateral tongue

Innervation: CN XII

Action: depresses and retracts the tongue

Question 2

Genioglossus

Answer 2

Origin: superior mental spine

Insertion: hyoid bone, tongue

Innervation: CN XII

Action: protrudes, depresses and retracts the tongue

Question 3

Styloglossus

Answer 3

Origin: styloid process

Insertion: lateral tongue

Innervation: CN XII

Action: retracts and elevates the tongue

Question 4

Palatoglossus

Answer 4

Origin: posterior margin of the hard palate, palatine aponeurosis

Insertion: lateral tongue

Innervation: CN X, pharyngeal branches

Action: depresses the palate, elevates back of the tongue