Cranium muscles and bones

Question 1

Pterion

Answer 1

Weak point in the skull where frontal, parietal, temporal and sphenoidal bones meet

Question 2

Sternocleidomastoid

Answer 2

• Lateral neck
• Rotates the head and neck to the opposite side
• Innervated by accessory nerve

Question 3

Annulus fibrosis

Answer 3

Tough layers in a fibriocartilaginous rim which limits rotation between vertebrae

Question 4

Nucleus pulposus

Answer 4

• softer, gelatinous and absorbs compression forces