Posterior Neck Muscles

Question 0

Splenius Cervicis

Answer 0

Origin: Nuchal ligament and spinous processes of C7-T3/4

Insertion: tubercles of transverse processes of C1-C3 or C4

Innervation: Posterior rami of spinal nerves

Question 1

Splenius Capitis

Answer 1

Origin: Nuchal ligament and spinous processes of C7-T3/4

Insertion: Fibers run superolaterally to mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone

Innervation: posterior rami of spinal nerves

Question 2

Rectus Capitus Posterior Major

Answer 2

Origin: Spinous process of C2

Insertion: Lateral part of the inferior nuchal line of occipital bone

Innervation: Suboccipital nerve (C1)

Question 3

Rectus Capitus Posterior Minor

Answer 3

Origin: Posterior tubercle on the posterior arch of C1

Insertion: Medial third of the inferior nuchal line

Innervation: Suboccipital nerve (C1)

Question 4

Obliquus Capitus Inferior

Answer 4

Origin: Spinous process of C2

Insertion: Transverse process of C1

Innervation: Suboccipital nerve (C1)

Question 5

Obliquus Capitus Superior

Answer 5

Origin: Transverse process of C1

Insertion: Occipital bone between superior and inferior nuchal lines

Innervation: Suboccipital nerve (C1)

Question 6

Platysma

Answer 6

Origin (superior): Inferior border of mandible, skin, and subcutaneous tissues of lower face

Insertion (inferior): Facia covering superior parts of pectoralis major and deltoid muscles

Innervation: Cervical branch of facial nerve (CN VII)

Question 7

Sternocleidomastoid

Answer 7

Origin (superior) : Lateral surface of mastoid process of temporal bone and lateral half of superior nuchal line

Insertion (inferior): (sternal head) anterior surface of manubrium of sternum; (clavicular head) superior surface of medial third of clavicle

Innervation: Spinal accessory nerve (CN XI, motor), C2 and C3 nerves (pain and proprioception)