Neck: Triangles and Muscles

Question 1

What are the borders of the anterior triangle of the neck

Answer 1

Anterior: SCM
Inferior: Mandible
Midline of neck

Question 2

What are the borders of the posterior triangle of the neck

Answer 2

SCM
Trapezius
Clavicle
Occipital bone

Question 3

What divides the posterior triangle

Answer 3

Omohyoid muscle

Question 4

What does the omohyoid muscle divide the posterior triangle into

Answer 4

occipital and supraclavicular triangles

Question 5

What are the divisions of the anterior triangle

Answer 5

Carotid
Submandibular
Submental
muscular triangle

Question 6

What are the borders of the submandibular triangle

Answer 6

mandible

digastric muscle bellies

Question 7

What are the borders of the submental triangle

Answer 7

hyoid bone

anterior belly digastric

Question 8

What are the borders of the muscular triangle

Answer 8

SCM
Superior omohyoid
hyoid bone

Question 9

What are the borders of the carotid triangle

Answer 9

superior omohyoid
SCM
posterior digastric and stylohyoid

Question 10

What are the attachments of stylohyoid

Answer 10

syloid process

hyoid bone

Question 11

What is the function of stylohyoid

Answer 11

elevation of hyoid

Question 12

What is the innervation of stylohyoid

Answer 12

CNVII

Question 13

What are the attachments of the digastric muscle

Answer 13

digastric fossa of mandible
mastoid notch
hyoid bone

Question 14

What is function of digastric muscle

Answer 14

elevation of hyoid

Question 15

What is the innervation of digastric muscle

Answer 15

anterior belly: V3

posterior belly: VII

Question 16

What are the attachments of mylohyoid

Answer 16

hyoid bone

mylohyoid line of mandible

Question 17

What are the functions of mylohyoid

Answer 17

elevation of hyoid

Question 18

What is the innervation of mylohyoid

Answer 18

CN V3

Question 19

What are the attachments of geniohyoid

Answer 19

mental spine of mandible

hyoid bone

Question 20

What is the function of geniohyoid

Answer 20

elevates and pulls hyoid forward

Question 21

What is the innervation of geniohyoid

Answer 21

C1 via CN12

Question 22

What are the suprahyoid muscles

Answer 22

mylohyoid
geniohyoid
digastric
stylohyoid

Question 23

What are the infrahyoid muscles

Answer 23

sternohyoid
sternothyroid
omohyoid
thyrohyoid

Question 24

What are the attachments of sternohyoid

Answer 24

manubrium to hyoid bone

Question 25

What is the function of sternohyoid

Answer 25

depress hyoid

Question 26

What is the innervation of sternohyoid

Answer 26

C1-C3 via ansa cervicalis

Question 27

What are the attachments of omohyoid

Answer 27

superior border of scapula | body of hyoid

Question 28

What is the function of omohyoid

Answer 28

depress hyoid bone

Question 29

What is the innervation of omohyoid

Answer 29

C1-C3 via ansa cervicalis

Question 30

What are the attachments of sternothyroid

Answer 30

manubrium | thyroid cartilage

Question 31

What is the function of sternothyroid

Answer 31

depress larynx

Question 32

What is the innervation of sternothyroid

Answer 32

C1-C3 via ansa cervicalis

Question 33

What are the attachments of thyrohyoid

Answer 33

thyroid cartilage to body of hyoid

Question 34

What is the innervation of thyrohyoid

Answer 34

C1 via Cn12

Question 35

What is the function of thyrohyoid

Answer 35

depress hyoid; elevate larynx

Question 36

What strap muscle is NOT associated with the hyoid bone

Answer 36

sternothyroid

Question 37

What is the action of the sternocleidomastoid muscle

Answer 37

Ipsilateral tilt and rotates face to opposite side

Question 38

What is the innervation of SCM

Answer 38

CN XI and C2-C3

Question 39

What is the innervation of trapezius

Answer 39

CNX1 and C3-C4

Question 40

What is torticollis

Answer 40

damage to the sternocleidomastoid or trapezius causing tilting of head

Question 41

What is the innervation of splenius capitis

Answer 41

posterior rami of middle cervical nerves

Question 42

What is the function of splenius capitus

Answer 42

rotate face towards the same side, draw head backwards

Question 43

What is the innervation of levator scapulae

Answer 43

dorsal scapular nerve

Question 44

What muscle acts as an antagonist to SCM

Answer 44

splenius capitis

Question 45

What is the innervation of the anterior scalene muscles

Answer 45

anterior rami C4-C7

Question 46

What is the innervation of the middle scalene muscles

Answer 46

anterior rami C3-C7

Question 47

What is the innervation of the posterior scalene muscles

Answer 47

anterior rami C5-C7