Extrinsic Back Muscle Innervations Quiz

Which cranial nerve is responsible for the innervation of the trapezius muscle?

• Cranial nerve 9

• Cranial nerve 12

• Cranial nerve 10

• Cranial nerve 11

What is the primary nerve that innervates the latissimus dorsi muscle?

• Suprascapular nerve

• Thoracodorsal nerve

• Dorsal scapular nerve

• Accessory nerve

From which part of the brachial plexus does the thoracodorsal nerve originate?

• Medial cord

• Lateral cord

• Posterior cord

• Anterior cord

Which nerve innervates the levator scapulae, rhomboid minor, and rhomboid major muscles?

• Long thoracic nerve

• Thoracodorsal nerve

• Dorsal scapular nerve

• Accessory nerve

The dorsal scapular nerve originates from which root of the brachial plexus?

• C5 root

• C7 root

• C6 root

• C4 root