Muscles of Neck

Question 0

Sternocleidomastoid

Answer 0

Inf) sternal head-anterior manubrium
Clavicular head– medial 1/3 of clavicle

Sup) Mastoid process of temporal bone (lateral surface)
laterial 1/2 superior nuchal line of occipital bone
N) CN 11
A) unilaterally-ipsilateral flexion and rotation to opposite side
bilaterally-flexes neck

Question 1

Platysma

Answer 1

Superficial Muscle:
Inf) fascia & skin over pectoralis major & deltoid muscle
Sup) Inferior border of mandible & skin of lower face
N) CN 7- cervical branch (facial n)
A) tense skin of neck, depresses angles of mouth, weak mandible depressor

Question 2

Sternohyoid

Answer 2

Inf) posterior surface of manubrium and medial clavicle
Sup) body of hyoid
N) ansa cervicalis
A) depresses hyoid

Question 4

Thyrohyoid

Answer 4

Inf) oblique line of thyroid cartilage

Sup) Body of greater horn of hyoid

N) C1 (VPR) via CN XII (hypoglossal)

A) depresses hyoid and elevated thyroid

Question 4

Omohyoid

Answer 4

O: Inferior Belly–superior border scapula (near suprascapular notch)
Superior Belly– intermediate tendon

I: Inferior belly–intermediate tendon (inferior border hyoid)
Superior belly– body of hyoid

N: ansa cervicalis
A: depresses, retracts and stabilizes hyoid

Question 5

Sternothyroid

Answer 5

Inf: Posterior manubrium of sternum

Sup: oblique line of thyroid cartilage

N: ansa cervicalis

A: depresses the thyroid cartilage

Question 7

Mylohyoid

Answer 7

Sup: mylohyoid line of mandible

Inf: raphe and body of hyoid

N: mylohyoid n (branch of V3, CN5)

A: elevates hyoid and tongue during speech and swallowing

Question 8

Geniohyoid

Answer 8

Sup: inferior mental spine of manible

Inf: body of hyoid

N: branch od C1 via CN 12 (hypoglossal)

A: pulls hyoid anterosuperiorly (widens pharynx)

Question 8

Diagastric

Answer 8

O: Anterior belly–diagastric fossa of mandible
Posterior belly–mastoid notch of tempooral bone

I: Intermediate tendon to hyoid (body&greater horn)
N: Anterior belly–mylohyoid nerve (branch of v3…CN5)
Posterior belly– CN7
A: depresses mandible, elevates hyoid

Question 9

Stylohyoid

Answer 9

Sup: styloid process of temporal bone

Inf: body of hypoid

N: CN7 (facial nerve, cervicle branch)

A: elevates and retracts hyoid (elongates floor of mouth)

Question 10

Scalene anterior

Answer 10

Sup: transverse process C3-C6
Inf: 1st rib (scalene tubercle)
A: lateral flexion of cervicle spine, assists in rotating neck to opposite side

Question 11

Scalenus medius

Answer 11

Sup: transverse process of C2-C7
Inf: superior surface of 1st rib (posterior to subclavian groove)
A: elevates 1st rib (accessory muscle of inspiration) lateral flexion of the cervical spine

Question 12

Scalenus Posterior

Answer 12

Sup: transverse process C4-C6
Inf: outer surface 2nd rib
A: lateral flexion of cervical spine elevates 2nd rib (acessory muscle of inspiration)

Question 13

Longus Coli (cervicus)

Answer 13

Inf: vertebral bodies C5-T3 and transverse processes C3-C5

Sup: body C2-C4, transverse processes C5-C6, anterior tubercle of atlas

A: flexes head and neck

Question 14

Longus Capitis

Answer 14

Inf: anterior tubercles transverse processes C3-C6

Sup: base of skull

A: flexes head and neck

Question 15

Rectus Capitis Anterior

Answer 15

Inf: lateral mass of atlas

Sup: base of skull anterior to occipital condyle

A: flexes head

Question 16

Rectus Capitis Lateralis

Answer 16

Inf: transverse process of atlas

Sup: jugular process of occipital bone

S: flexes head