Muscles

Question 1

Muscle of the posterior triangle floor

Answer 1

• Scalenes (3)
• Levator scapula
• Splenius capitis

Question 2

Deep cervical muscles that form the floor of the posterior triangle

Answer 2

Prevertebral muscles

Question 3

These prevertebral muscles arise from TPs and insert of 1st and 2nd ribs

Answer 3

Scalenes (2nd rib = posterior)

Question 4

This muscle provides a landmark for 3 divisions of the subclavian artery and phrenic nerve

Answer 4

Anterior scalene