Elbow joint. Structure and actions

The video tutorial provides an in-depth look at the elbow joint, focusing on its structure, movements, and supporting ligaments. It begins with an overview of the elbow joint, highlighting the hinge and pivot joints. The tutorial then delves into the details of the hinge joint, explaining the roles of the trochlea and trochlear notch. It also covers the pivot joint, describing pronation and supination movements. Finally, the video discusses the ligaments that support the elbow joint, including the joint capsule, collateral ligaments, and annular ligament.

What are the primary movements facilitated by the hinge joint of the elbow?

• Rotation and circumduction

• Flexion and extension

• Pronation and supination

• Abduction and adduction

Which structures articulate to form the hinge joint of the elbow?

• Trochlea and trochlear notch

• Trochlea and radial head

• Capitulum and trochlear notch

• Capitulum and ulnar head

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

• It articulates with the trochlea

• It allows for flexion and extension

• It articulates with the radial notch for pronation and supination

• It stabilizes the elbow joint

How does the annular ligament contribute to elbow joint stability?

• It supports the trochlear notch

• It connects the humerus to the ulna

• It forms a ring around the radial head

• It prevents excessive extension

What is the role of the ulnar collateral ligament?

• It prevents excessive pronation

• It allows for supination

• It stabilizes the elbow against valgus forces

• It connects the radius to the humerus

Which ligament is responsible for preventing excessive lateral movement of the elbow?

• Radial collateral ligament

• Ulnar collateral ligament

• Joint capsule

• Annular ligament

What is the primary function of the joint capsule in the elbow?

• To facilitate flexion and extension

• To provide a pocket of fluid for lubrication

• To allow for rotation

• To connect the radius and ulna