Suboccipital/Deep Neck Muscles - Dorsal Rami of C1 Suboccipital Nerve

Question 1

Rectus Capitis Posterior Major

Answer 1

Origin: Spinous process of Axis

Insertion: Inferior nuchal line

Function:
1. Capital extension
2. Rotation and bending of head to same side

Innervation:
Dorsal rami of C1 - Suboccipital nerve

Question 2

Rectus Capitis Posterior Minor

Answer 2

Origin: Tubercle on posterior arch of Atlas

Insertion: Inferior nuchal line

Function: Capital extension

Innervation:
Dorsal rami of C1 - Suboccipital nerve

Question 3

Obliquus Capitis Superior

Answer 3

Origin: Transverse process of Atlas

Insertion: Occiput b/w superior and inferior nuchal lines

Function:
1. Capital extension of head on atlas
2. Lateral bending of head to same side

Innervation:
Dorsal rami of C1 - Suboccipital nerve

Question 4

Obliquus Capitis Inferior

Answer 4

Origin: Spinous process of Axis

Insertion: Transverse process of Atlas

Function:
1. Rotation of head to same side
2. Lateral bending

Innervation:
Dorsal rami of C1 - Suboccipital nerve

Question 5

Suboccipital triange

Answer 5

Borders:
1. Obliquus capitis superior
2. Obliquus capitis inferior
3. rectus capitis posterior major

Floor: Posterior atlanto-occipital membrane

Innervation: Dorsal rami of C1 - suboccipital n.