Posterior Neck

Question 1

Splenius

Answer 1

-origin: spinous processes of C4-T6
splits into splenius capitis and splecius cervicis
-insertion:
splenius capitis>posterior aspect of mastoid process
splenius cervicis>transverse processes of C1-C4
-action:
unilaterally>rotates head and neck unilaterally
bilaterally>assists with cervical extension
-innervation: dorsal rami of cervical spinal nerves

Question 2

Levator Scapulae

Answer 2

• originate: transverse processes of C1-C4
• insertion: superior angle of scapula
• action: elevate scapula or side bend neck ipsilaterally
• innervation: dorsal scapular nerve (C5), a branch of the brachial plexus

Question 3

where can you find Accessory Nerve (CN XI) and Transverse Cervical Artery

Answer 3

under trapezius. leaving posterior triangle of neck, lateral to levator scapulae, and entering the muscle

Question 4

Semispinalis

Answer 4

-origin: transverse processes of thoracic vertebrae
-insertion: spinous processes (or posterior skull) above the origin
capitis>posterior skull
cervicis>spinous processes (deep to capitis)
-action:
unilaterally>rotate head and neck contralaterally
bilaterally>assist with cervical extension
-innervation: posterior rami of cervical spinal nerves

Question 5

what are the muscles muscles of Suboccipital Triangle, innervation and action

Answer 5

rectus capitis posterior minor
rectus capitis posterior major
obliquus capitis inferior
obliquus capitis superior

• innervation: suboccipital nerve (emerges from center of triangle)
• action: proprioception

Question 6

Rectus Capitis Posterior Major attachments

Answer 6

inferior nuchal line to C2 spinous process

Question 7

Rectus Capitis Posterior Minor attachments

Answer 7

inferior nuchal line of skull to posterior tubercle of C1

Question 8

Obliquus Capitis Superior attachments

Answer 8

inferior nuchal line of skull to transverse process of C1

Question 9

Obliquus Capitis Inferior attachments

Answer 9

spinous process of C2 to transverse process of C1

Question 10

what are the three nerves that are associated with the suboccipital triangle

Answer 10

• Suboccipital Nerve (dorsal ramus of C1)
• Greater Occipital Nerve (dorsal ramus of C2)
• Least Occipital Nerve (dorsal ramus of C3)