This tutorial by Matt from Kenhub focuses on the infraspinatus muscle, part of the rotator cuff in the upper extremity. It covers the origin, insertion, anatomy, and function of the infraspinatus, highlighting its role as a strong external rotator and its assistance in abduction and adduction. The rotator cuff's primary function is to stabilize the humeral head in the glenoid cavity and facilitate shoulder movements. The video concludes with a call to explore more anatomy resources on Kenhub.

Which muscles are part of the rotator cuff?

• Gluteus maximus, gluteus medius, gluteus minimus, and tensor fasciae latae

• Latissimus dorsi, trapezius, rhomboid major, and serratus anterior

• Supraspinatus, infraspinatus, teres minor, and subscapularis

• Biceps brachii, triceps brachii, deltoid, and pectoralis major

Where does the infraspinatus muscle originate?

• Coracoid process of the scapula

• Acromion process of the scapula

• Greater tubercle of the humerus

• Infraspinatous fossa of the scapula

What is the primary function of the rotator cuff?

• To flex the elbow joint

• To stabilize and center the humeral head in the glenoid cavity

• To extend the knee joint

• To rotate the wrist

What role does the infraspinatus muscle play in shoulder movement?

• It is a strong external rotator and assists in abduction and adduction

• It assists in flexion and extension

• It is a strong internal rotator

• It stabilizes the elbow joint

What is the main purpose of the video tutorial?

• To focus on the anatomy of the lower limb

• To provide a detailed guide on the entire human anatomy

• To replace textbooks with interactive learning

• To discuss the cardiovascular system