Vertebral column (lateral)

Question 1

Origin of all scalene muscles?

Answer 1

Cervical transverse processes

Question 2

Insertions of each scalene muscle?

Answer 2

Anterior - anterior 1st rib
Middle - lateral 1st rib
Posterior - posterior 2nd rib

Question 3

Actions of all scalenes?

Answer 3

Bilateral - cervical flexion, stabilise cervical spine, accessory muscle for inspiration
Unilateral - ipsilateral cervical LF

Question 4

Innervation of all scalenes?

Answer 4

Ventral rami spinal nerves