Muscles of the Anterior Neck

Question 1

Longus Coli

Answer 1

O: Anterior tubercle of C1; Bodies of C1-C3 and TPs of C3-C6
I: TPs of C3-C5; Bodies of C5-T3
N: APRs of C2-C6 spinal nerves
A: Flexes Neck with contralateral rotation if acting unilaterally

Question 2

Longus Capitis

Answer 2

O: Basilar part of occipital bone
I: Anterior tubercles of C3-C6 TPs
N: APRs of C1-C3 Spinal Nerves
A: Flex Head

Question 3

Anterior Scalene

Answer 3

O: TPs of C3-C6
I: 1st Rib
N: Cervical Spinal Nerves C4-C6
A: Flex Head

Question 4

Middle Scalene

Answer 4

O: Posterior Tubercles of TPs of C5-C7
I: Superior Surface of 1st Rib; posterior to groove for subclavian artery
N: APRs of Cervical Spinal Nerves
A: Flexes neck laterally; elevates 1st rib during forced inspiration

Question 5

Posterior Scalene

Answer 5

O: Posterior Tubercles of TPs of C5-C7
I: External Border of 2nd Rib
N: APRs of Cervical Spinal Nerves C7, C8
A: Flexes neck laterally; elevates 2nd Rib during forced inspiration

Question 6

Platysma

Answer 6

O: Inferior border of mandible, skin, and subcutaneous tissues of lower face
I: Fascia covering superior parts of pectorals major and deltoid muscles
N: Cervical Branch of Facial Nerve (CN VII)
A: Draws corners of mouth inferiorly and widens it as in expressions of sadness and fright; draws skin of neck superiorly when teeth are clenched

Question 7

Sternocleidomastoid

Answer 7

O: Lateral surface of mastoid process of temporal bone and lateral half of superior nuchal line
I: Sternal Head: Anterior surface of manubrium of sternum; Clavicular Head: Superior surface of medial third of clavicle
N: Spinal Accessory Nerve (CN XI) and C2, C3 sensory
A: tilts head to same, contralateral rotation, extends neck at upper C/S, and flexes lower C/S