Wrist Anatomy and Function

This video tutorial explores the functional anatomy of the wrist and hand, focusing on the bones, joints, and muscles involved. It covers the role of sesamoid bones in the thumb, the mechanics of radial ulnar joints in pronation and supination, and the structure of intercarpal and carpo-metacarpal joints. The anatomy of the carpal tunnel and the function of the extensor retinaculum are also discussed, providing a comprehensive overview of the wrist and hand's complex anatomy.

Which bones are part of the wrist and hand structure?

• Tarsals, Metatarsals, and Phalanges

• Femur, Tibia, and Fibula

• Radius, Ulna, Carpals, Metacarpals, and Phalanges

• Humerus, Scapula, and Clavicle

What is the primary function of sesamoid bones in the hand?

• To provide blood supply to the hand

• To connect muscles to bones

• To change the mechanical advantage of tendons

• To protect the nerves in the hand

Which joint is responsible for the rotation of the radius around the ulna?

• Carpometacarpal joint

• Distal radial ulnar joint

• Metacarpophalangeal joint

• Interphalangeal joint

For a muscle to contribute to pronation or supination, where must it attach?

• To the ulna

• To the carpals

• To the radius

• To the metacarpals

What binds the carpal bones together in the wrist?

• Muscles

• Nerves

• Interosseous ligaments

• Tendons

What is a common issue that can occur due to the complexity of wrist ligaments?

• Dislocation of the ulna

• Tendonitis

• Sprained wrist

• Fracture of the radius

What is the carpal tunnel composed of?

• Only bones

• Only ligaments

• Proximal carpals and transverse carpal ligament

• Muscles and tendons

What passes through the carpal tunnel?

• Nine tendons and the median nerve

• Blood vessels and nerves

• Only the median nerve

• Only tendons

What condition is caused by the entrapment of the median nerve at the carpal tunnel?

• Tennis elbow

• Cubital tunnel syndrome

• Carpal tunnel syndrome

• Rotator cuff injury

What is the role of the extensor retinaculum in the wrist?

• To anchor the wrist extensor muscles

• To connect the radius and ulna

• To protect the wrist from fractures

• To supply blood to the wrist