Deep Neck

Question 1

Rectus Capitis Posterior Minor

Answer 1

Origin: tubercle of posterior arch of atlas

Insertion: median inferior nuchal line

Innervation: suboccipital nerve

Blood Supply: vertebral artery - descending branch of occipital artery

Action: extend head

Question 2

Rectus Capitis Posterior Major

Answer 2

Origin: spine of axis

Insertion: inferior nuchal line

Innervation: suboccipital nerve

Blood Supply: vertebral artery - descending branch of occipital artery

Action: extends head to same side and rotates head to same side

(medial boundary of suboccipital triangle)

Question 3

Obliquues Capitis Superior

Answer 3

Origin: transverse process of atlas

Insertion: between superior and inferior nuchal lines

Innervation: suboccipital nerve

Blood Supply: vertebral artery - descending branch of occipital artery

Action: extends head and laterally bends head

(lateral border of suboccipital triangle)

Question 4

Obliquues Capitis Inferior

Answer 4

Origin: spine of axis

Insertion: transverse process of atlas

Innervation: suboccipital nerve

Blood Supply: vertebral artery - descending branch of occipital artery

Action: rotates atlas to turn face to same side

(inferior border of suboccipital triangle)