094 Innervations Of The Extrinsic Back/Shoulder Muscles

Leslie Samuel discusses the innervation of extrinsic back muscles, focusing on both superficial and deep muscles. The trapezius muscle is innervated by the accessory nerve (cranial nerve 11), while the latissimus dorsi is innervated by the thoracodorsal nerve. Deep muscles like levator scapulae, rhomboid minor, and rhomboid major are innervated by the dorsal scapular nerve. The video concludes with a review of these innervations and encourages viewers to engage with more content on the website.

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

• Thoracodorsal nerve

• Brachial plexus nerve

• Dorsal scapular nerve

• Accessory nerve

What is the innervating nerve for the latissimus dorsi muscle?

• C5 root nerve

• Accessory nerve

• Dorsal scapular nerve

• Thoracodorsal nerve

Which of the following muscles is innervated by the dorsal scapular nerve?

• Latissimus dorsi

• Levator scapulae

• Trapezius

• Pectoralis major

The dorsal scapular nerve originates from which root?

• C3 root

• C5 root

• C8 root

• C7 root

Which muscle is NOT innervated by the dorsal scapular nerve?

• Rhomboid minor

• Rhomboid major

• Latissimus dorsi

• Levator scapulae