096 Innervations Of The Intrinsic Shoulder Muscles

Leslie Samuel discusses the innervation of intrinsic shoulder muscles, focusing on the axillary, suprascapular, and subscapular nerves. The axillary nerve innervates the deltoid and teres minor, while the suprascapular nerve innervates the supraspinatus and infraspinatus. The subscapular nerves, both upper and lower, innervate the subscapularis, with the lower also innervating the teres major. The video concludes with a review of these innervations.

Which muscles are considered intrinsic shoulder muscles?

• Latissimus dorsi and teres major

• Biceps and triceps

• Deltoid and supraspinatus

• Pectoralis major and minor

What are the three main nerves involved in the innervation of intrinsic shoulder muscles?

• Femoral, sciatic, and tibial nerves

• Axillary, suprascapular, and subscapular nerves

• Phrenic, vagus, and accessory nerves

• Radial, median, and ulnar nerves

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

• Medial cord

• Lateral cord

• Anterior cord

• Posterior cord

Which muscles are innervated by the axillary nerve?

• Supraspinatus and infraspinatus

• Deltoid and teres minor

• Biceps and brachialis

• Subscapularis and teres major

Through which anatomical structure does the suprascapular nerve pass?

• Quadrangular space

• Triangular interval

• Suprascapular notch

• Inguinal canal

Which muscles are innervated by the suprascapular nerve?

• Pectoralis major and minor

• Subscapularis and teres major

• Supraspinatus and infraspinatus

• Deltoid and teres minor

Which nerve innervates both the subscapularis and teres major muscles?

• Radial nerve

• Suprascapular nerve

• Axillary nerve

• Lower subscapular nerve