Scapular Protractors | Origins, Insertions, Innervations, & Actions

This video tutorial explores the anatomy and function of the pectoralis minor and serratus anterior muscles. It discusses their origins, insertions, innervations, and actions, emphasizing their roles in scapular protraction and stabilization during movements like bench presses and boxing. The serratus anterior is highlighted as the primary muscle for scapular protraction, earning it the nickname 'boxer's muscle'. The tutorial also provides visual aids to enhance understanding of these muscles' anatomical positions and functions.

Which muscle might need to be removed to fully view the pectoralis minor?

• Deltoid

• Latissimus dorsi

• Pectoralis major

• Trapezius

What is the primary function of the pectoralis minor during a bench press?

• Stabilizing the scapula

• Flexing the elbow

• Extending the arm

• Rotating the shoulder

Where does the pectoralis minor originate?

• Ribs 1 to 3

• Ribs 7 to 9

• Ribs 3 to 5

• Ribs 5 to 7

What is the main nerve that innervates the serratus anterior?

• Axillary nerve

• Ulnar nerve

• Long thoracic nerve

• Radial nerve

Why is the serratus anterior often called the 'boxer's muscle'?

• It helps in shoulder abduction

• It stabilizes the elbow during punches

• It protracts the scapula for a punch

• It flexes the wrist during a punch

On which ribs does the serratus anterior originate?

• Upper 5 ribs

• Upper 7 ribs

• Upper 9 ribs

• Upper 11 ribs

What is the insertion point of the serratus anterior?

• Inferior angle of the scapula

• Medial border of the scapula

• Superior angle of the scapula

• Lateral border of the scapula