Muscles of the Hyoid

Question 1

Characteristics of the Hyoid muscles

Answer 1

Assist in the movement of the tongue and floor of mouth during mastication and swallowing
Groups: Suprahyoid, Infrahyoid
All attached in some way to the hyoid bone, except for the sternothyroid

Question 2

Which muscles are innervated by the mylohyoid nerve?

Answer 2

Anterior belly of digastric muscle

Mylohyoid muscle

Question 3

Which muscles are innervated by the posterior gastric nerve?

Answer 3

Posterior belly of digastric muscle

Question 4

Which muscles are innervated by the stylohyoid nerve?

Answer 4

Stylohyoid muscle

Question 5

Which muscle is innervated by the first cervical nerve?

Answer 5

Geniohyoid muscle

Question 6

Which muscles are innervated by the third cervical nerves?

Answer 6

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

Question 7

Action of the anterior belly of the digastric muscle

Answer 7

Forms midline of submental triangle

Elevates hyoid bone and larynx.
Depresses mandible and opens jaw

Question 8

Origin and Insertion of the anterior belly of the digastric muscle

Answer 8

Origin: Intermediate tendon attaches to hyoid bone
Insertion: Midline, inner surface of mandible, lateral to genial tubercle

Question 9

Action of the posterior belly of the digastric muscle

Answer 9

Forms submandibular triangle w/ mandible

Elevates hyoid bone and larynx

Question 10

Origin and insertion of the posterior belly of the digastric muscle

Answer 10

origin: mastoid notch of temporal bone
Insertion: intermediate tendon

Question 11

Action of the mylohyoid muscle

Answer 11

Forms the floor of the mouth

Elevates hyoid bone and larynx, depresses mandible, opens jaw and helps elevate the tongue

Question 12

Origin and insertion of the mylohyoid

Answer 12

origin: mylohyoid line of mandible
insertion: body of the hyoid bone

Question 13

Action of the stylohyoid muscle

Answer 13

Elevates hyoid bone and larynx

Question 14

Origin and insertion of the stylohyoid

Answer 14

origin: styloid process of temporal bone
insertion: body of hyoid bone

Question 15

Action of the geniohyoid muscle

Answer 15

Forms floor of mouth

Elevates hyoid bone and larynx. Depresses mandible and opens jaw. Helps elevate the tongue

Question 16

Origin and insertion of the geniohyoid muscle

Answer 16

origin: genial tubercles of mandible
insertion: body of the hyoid bone

Question 17

What are the 4 suprahyoid muscles?

Answer 17

Digastric
Mylohyoid
Stylohyoid
Geniohyoid

Question 18

What are the 4 infrahyoid muscles?

Answer 18

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

Question 19

Action of the superior belly of the omohyoid

Answer 19

Divides inferior portion of the anterior cervical triangle into carotid and mascular triangles

Action: Depresses hyoid bone

Question 20

Origin and insertion of the superior belly of the omohyoid

Answer 20

origin: short tendon attaches to inferior belly
insertion: lateral border of body of hyoid bone

Question 21

Action of the inferior belly of the omohyoid

Answer 21

Divides the posterior cervical triangle into occipital and subclavian triangles

action: depresses hyoid bone

Question 22

Origin and insertion of inferior belly of omohyoid

Answer 22

Origin: scapula
Insertion: short tendon to the superior belly

Question 23

Action of the sternohyoid

Answer 23

Depresses hyoid bone

Question 24

Origin and insertion of the sternohyoid

Answer 24

origin: sternum & clavicle
insertion: posterior & superior surfaces of body of hyoid bone

Question 25

Action of the sternothyroid

Answer 25

depresses only thyroid cartilage and larynx (not the bone)

Question 26

Origin and Insertion of the sternothyroid

Answer 26

origin: posterior surface of the sternum
insertion: thyroid cartilage

Question 27

Action of the thyrohyoid

Answer 27

Depresses hyoid bone and raises the thyroid cartilage & larynx

Question 28

origin and insertion of the thyrohyoid

Answer 28

origin: thyroid cartilage
insertion: body & greated horn of hyoid bone`