Muscles of the Anterior of the Neck

Question 1

What is the landmark of the neck region?

Answer 1

sternocleidomastoid

Question 2

The anterior region of the neck is divided into what by the SCM?

Answer 2

two triangles, anterior and posterior

Question 3

What do muscles of the anterior of the neck assist in?

Answer 3

deglutition and speech

Question 4

What is deglutition

Answer 4

swallowing

Question 5

What are the muscle groups in relation to the hyoid bone?

Answer 5

suprahyoid

infrahyoid

Question 6

When the suprahyoid and infrahyoid muscles act together what happens?

Answer 6

both groups acting together stabilize the hyoid bone for the muscles attaching there to act

Question 7

What do the suprahyoid muscles form?

Answer 7

the floor of the mouth

Question 8

What are the common actions of suprahyoid muscles?

Answer 8

elevate they hyoid bone, the floor of the mouth and the tongue when swallowing

Question 9

How many suprahyoid muscles are there? What are they?

Answer 9

4:

1. digastric
2. stylohyoid
3. mylohyoid
4. geniohyoid

Question 10

What muscles actively depress the mandible when we need to open our mouth wider?

Answer 10

suprahyoid

Question 11

What is the origin of the stylohyoid muscle

Answer 11

styloid process of temporal bone

Question 12

What is the insertion of the stylohyoid

Answer 12

body of hyoid

Question 13

What are the actions of the stylohyoid

Answer 13

elevates and pulls back the hyoid bone during swallowing (draws it posteriorly)

Question 14

What nerve innervates the stylohyoid

Answer 14

facial nerve

Question 15

The tendon of the digastric muscles passes through what muscle?

Answer 15

stylohyoid

Question 16

What is the origin of the mylohyoid

Answer 16

inner surface of mandible

Question 17

What is the insertion of the mylohyoid

Answer 17

hyoid bone

Question 18

What are the actions of the mylohyoid

Answer 18

elevates hyoid, floor of mouth and depresses mandible

Question 19

What nerve innervates the mylohyoid

Answer 19

mandibular division of trigeminal nerve

Question 20

The two muscles that are united by a raphe in the midline and insert in the mandible is what muscle?

Answer 20

mylohyoid

Question 21

What muscle is superior to the mylohyoid

Answer 21

geniohyoid

Question 22

What is the origin of the geniohyoid

Answer 22

posterior aspect of the chin from genial tubercles (mental spines)

Question 23

What is the insertion of the geniohyoid

Answer 23

body of hyoid

Question 24

What are the actions of the geniohyoid

Answer 24

elevates hyoid, draws hyoid and tongue anteriorly

Question 25

What nerve innervates the geniohyoid

Answer 25

first cervical spinal nerve

Question 26

What is the RMA of geniohyoid

Answer 26

depresses mandible

Question 27

What do infrahyoid muscles look like?

Answer 27

ribbons or straps to hyoid

Question 28

What are common actions of infrahyoid muscles?

Answer 28

depresses the hyoid bone and move the larynx when swallowing and talking

Question 29

How many infrahyoid muscles are there? What are they?

Answer 29

``` 4: omohyoid sternohyoid sternothyroid thyrohyoid ```

Question 30

The omohyoid is composed of what?

Answer 30

two bellies (superior and inferior) connected by an intermediate tendon

Question 31

What is the origin of the omohyoid?

Answer 31

superior border of scapula and superior transverse ligament

Question 32

What is the insertion of the omohyoid

Answer 32

body of hyoid

Question 33

What are the actions of omohyoid

Answer 33

depresses hyoid

Question 34

What nerve innervates the omohyoid

Answer 34

branches of spinal nerves C1-C3

Question 35

What is the origin of the sternohyoid

Answer 35

manubrium of sternum and medial clavicle

Question 36

What is the insertion of the sternohyoid

Answer 36

bbody of hyoid

Question 37

What are the actions of the sternohyoid

Answer 37

depresses hyoid

Question 38

What nerve innervates the sternohyoid

Answer 38

branches of spinal nerves C1-C3

Question 39

What is the origin of the sternothyroid

Answer 39

manubrium of sternum

Question 40

what is the insertion of the sternothyroid

Answer 40

thyroid cartilage of larynx

Question 41

What are the actions of the sternothyroid

Answer 41

depresses thyroid cartilage of larynx

Question 42

What is the innervation of sternothyroid

Answer 42

branches of spinal nerves C1-C3

Question 43

What is the origin of thyrohyoid

Answer 43

thyroid cartilage of larynx

Question 44

What is the insertion of thyrohyoid

Answer 44

greater horn of hyoid

Question 45

What are the actions of thyrohyoid

Answer 45

depresses hyoid

Question 46

What is the innervation of thyrohyoid

Answer 46

branches of spinal nerves of C1-C2 and descending hypoglossal nerve

Question 47

What is the RMA of thyrohyoid

Answer 47

elevates thyroid cartilage to produce high sounds