Muscles Of The Neck

Question 1

Superior attachment of the platysma muscle

Answer 1

inferior border of mandible and tissues of lower face

Question 2

Inferior attachment of the platysma muscle

Answer 2

fascia covering pectoralis major and deltoid muscles

Question 3

Platysma nerve supply

Answer 3

cervical branch of facial nerve

Question 4

Action of platysma muscle

Answer 4

1- tenses skin as in shaving the neck or easing a tight collar
2- depresses mandible and corners of mouth as in expression of sadness or fright

Question 5

A paired muscle in the superficial layers of the anterior portion of the neck; passes obliquely across the side of the neck; thick and narrow at its central part, but broader and thinner at either end

Answer 5

SCM

Question 6

Origin of SCM

Answer 6

Anterior and superior manubrium and superior medial third of clavicle

Question 7

Insertion of SCM

Answer 7

Lateral aspect of mastoid process and anterior half of superior nuchal line

Question 8

SCM nerve supply

Answer 8

Spinal accessory nerve (lateral roots C1-5)

Question 9

SCM action:

Answer 9

1- flexes and laterally rotates cervical spine
2- protracts head when acting together
3- extends neck when neck already partially extended

Question 10

Anterior neck muscles / strap muscles

Answer 10

1. Suprahyoid muscles

2. Infrahyoid muscles

Question 11

region above (superior) the hyoid bone in the neck

Answer 11

Suprahyoid

Question 12

Suprahyoid muscles

Answer 12

• digastric
• stylohyoid
• geniohyoid
• mylohyoid

Question 13

Infrahyoid muscles

Answer 13

• sternothyroid
• sternohyoid
• thyrohyoid
• omohyoid

Question 14

A group of four pairs of muscles in the anterior part of the neck above the hyoid bone

Answer 14

Suprahyoid muscles

Question 15

O: mastoid process mandible
I: intermediate tendon (hyoid bone)
N: anterior belly - mandibular division (V3);
posterior belly - facial nerve (CN VII)

Answer 15

Digastric

Question 16

O: styloid process
I: greater cornu of hyoid bone
N: facial nerve

Answer 16

Stylohyoid

Question 17

O: symphysis menti
I: hyoid bone
N: C1 via hypoglossal nerve

Answer 17

Geniohyoid

Question 18

O: mylohyoid line of mandible
I: median raphe
N: mylohyoid nerve from mandibular nerve

Answer 18

Mylohyoid

Question 19

1. elevate the hyoid when mandible is fixed

2. opens the jaw when the hyoid is fixed

Answer 19

Digastric

Question 20

elevate the hyoid during swallowing

Answer 20

Stylohyoid

Question 21

carry hyoid bone and the tongue upward during deglutition

Answer 21

Geniohyoid

Question 22

raises oral cavity floor, elevates hyoid, depresses mandible

Answer 22

Mylohyoid

Question 23

it has two bellies; connected by a tendon, which attaches to the body of the hyoid bone.

Answer 23

Digastric

Question 24

a slender muscle, lying in front of, and above the posterior belly of the digastric muscle.
It is perforated, near its insertion, by the tendon of the Digastric muscle

Answer 24

Stylohyoid

Question 25

a narrow muscle situated superior to the medial border of the mylohyoid muscle

Answer 25

Geniohyoid

Question 26

It forms, with its fellow of the opposite side, a muscular floor for the cavity of the mouth

Answer 26

Geniohyoid

Question 27

flat and triangular, and is situated immediately above the anterior belly of the digastric muscle; forms a muscular floor for the cavity of the mouth

Answer 27

Mylohyoid

Question 28

A group of four pairs of muscles in the anterior part of the neck below the hyoid bone.

Answer 28

Infrahyoid muscles

Question 29

O: sternum I: thyroid cartilage N: ansa cervicalis from the cervical plexus(C1-3)

Answer 29

Sternothyroid

Question 30

O: sternum I: hyoid bone N: ansa cervicalis from the cervical plexus(C1-3)

Answer 30

Sternohyoid

Question 31

O: thyroid cartilage I: hyoid bone N: C1

Answer 31

Thyrohyoid

Question 32

O: superior border of scapula I: hyoid bone N: ansa cervicalis from the cervical plexus(C1-3)

Answer 32

Omohyoid

Question 33

a thin, narrow muscle attaching the hyoid bone to the sternum

Answer 33

Sternohyoid

Question 34

shorter and wider than the Sternohyoid, beneath which it is situated

Answer 34

Sternothyroid

Question 35

a small, quadrilateral muscle appearing like an upward continuation of the Sternothyroid

Answer 35

Thyrohyoid

Question 36

a muscle at the front of the neck that consists of two bellies separated by an intermediate tendon

Answer 36

Omohyoid

Question 37

The inferior belly of the Omohyoid divides the posterior triangle of the neck into

Answer 37

upper or occipital triangle | lower or subclavian triangle

Question 38

The superior belly of the omohyoid divides the anterior triangle into

Answer 38

upper or carotid triangle | lower or muscular triangle

Question 39

Infrahyoid muscle action

Answer 39

depress the hyoid bone and larynx during swallowing and speaking

Question 40

Broad thin subcutaneous sheet of muscle, superficial to the external jugular vein (EJV) and the main cutaneous nerves of the neck

Answer 40

Platysma