Origins & Insertions

Question 1

Rectus Capitis Posterior Major

Answer 1

O: spinous process of C2
I: Lateral portion of inferior nuchal line
A: rotate C1 on C2 "no"
Innervation: sub occipital nerve
**Medial border of suboccipital triangle

Question 2

Rectus Capitis Posterior Minor

Answer 2

O: posterior arch of C1
I: medial portion of inferior nuchal line
A: Rotate C1 on C2 “no”
Innervation: Subocciptal nerve
**minor so not involved in sub occipital triangle*

Question 3

Obliquus capitis inferior

Answer 3

O: Spinous process of C2
I: Transverse process of C1
A: Rotate C1 on C2 "no"
Innervation: suboccipital nerve
**Inferior border of suboccipital triangle
Only muscle not attached to cranium

Question 4

Obliquus capitis superior

Answer 4

O: Transverse process of C1
I: Lateral Portion of Inferior nuchal line
A: neck extension
Innervation: suboccipital nerve
** Makes up lateral border of sub occ triangle