Musculi pectorales

The video tutorial explores the anatomy and functions of the pectoralis muscles, focusing on the pectoralis major and minor. It covers their structure, location, and the nerve innervation from the brachial plexus. The pectoralis major is crucial for shoulder joint movements and aids in breathing, while the pectoralis minor assists in shoulder blade movements and also supports breathing.

Where is the pectoralis minor muscle located in relation to the pectoralis major?

• Above the pectoralis major

• Below the pectoralis major

• Lateral to the pectoralis major

• Medial to the pectoralis major

Which structures run between the pectoralis muscles and the bony thorax?

• The subclavian vein and lymph nodes

• The brachial plexus and artery

• The artery and subclavian vein

• The brachial plexus and subclavian vein

Which nerves are responsible for the innervation of the pectoral muscles?

• Axillary and radial nerves

• Medial and lateral nerves

• Ulnar and median nerves

• Radial and ulnar nerves

What is the primary role of the pectoralis major muscle in the human body?

• To assist in the movement of the shoulder blade

• To provide support to the rib cage

• To aid in shoulder joint movements

• To shape the posterior thorax

What is one of the main tasks of the pectoralis minor muscle?

• To lift the rib cage

• To extend the shoulder joint

• To rotate the upper arm internally

• To depress the shoulder blade