Muscles Of The Head

Question 1

Rectus Capitis Posterior Major

Answer 1

Origin: spinous process of axis (C2)
Insertion: lateral half inferior nuchal line
Action: extends head at Atlanto-occipital joint

Question 2

Rectus Capitis Posterior Minor

Answer 2

Origin: posterior tubercle of Atlas (C1)
Insertion: medial half of inferior nuchal line
Action: protracts head at Atlanto-occipital joint

Question 3

Obliquus Capitis Inferior

Answer 3

Origin: SP of axis (C2)
Insertion: TVP of Atlas (C1)
Action: ipsilaterally rotates the atlas at Atlantoaxial joint

Question 4

Obliquus Capitis Superior

Answer 4

Origin: TVP of Atlas (C1)
Insertion: Occiput between the superior and inferior nuchal lines
Action: protracts head at Atlanto-occipital joint