Elbow and Forearm Joint Functions

The video tutorial explores the anatomy of the elbow and forearm, focusing on the various joints and ligaments. It covers the humeroulnar, humeroradial, and proximal radioulnar joints, explaining their structures and functions. The tutorial also discusses the ligaments associated with these joints, including the radial and ulnar collateral ligaments and the annular ligament. Additionally, it examines the interosseous membrane and the distal radioulnar joint, highlighting their roles in forearm movement.

What is the primary focus of the elbow and forearm region compared to the shoulder?

• The length of the bones

• The number of muscles

• The complexity and number of joints

• The strength of the ligaments

Which joint is often referred to as the 'true elbow joint'?

• Humeroradial joint

• Humeroulnar joint

• Proximal radioulnar joint

• Distal radioulnar joint

What is the function of the radial head in the elbow joint?

• To connect with the wrist

• To articulate with the capitulum

• To provide muscle attachment

• To stabilize the ulna

Which ligament is shaded in yellow and attaches from the humerus to the radius?

• Interosseous membrane

• Radial collateral ligament

• Annular ligament

• Ulnar collateral ligament

What is the role of the annular ligament in the elbow joint?

• To stabilize the wrist

• To attach muscles to the ulna

• To surround the head of the radius

• To connect the humerus and ulna

What type of joint is the interosseous membrane classified as?

• Cartilaginous joint

• Hinge joint

• Synovial joint

• Fibrous joint

What is the primary function of the interosseous membrane?

• To facilitate pronation and supination

• To allow for muscle attachment

• To connect the wrist bones

• To stabilize the shoulder

How does the radius change as it moves distally?

• It becomes wider

• It becomes more curved

• It remains the same width

• It becomes narrower

What type of joint is the distal radioulnar joint?

• Saddle joint

• Hinge joint

• Ball and socket joint

• Pivot joint

What movement is facilitated by the distal radioulnar joint?

• Pronation and supination

• Flexion and extension

• Abduction and adduction

• Rotation and circumduction