Anatomy: Axillary Fold and Elbow Region

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What is the function of the anular ligament in the proximal radioulnar joint?

Facilitates pronation and supination movements

Stabilizes the elbow joint

Assists in preventing displacement of the radius on the ulna during pulling

Prevents proximal displacement of the radius and ulna during pushing movements (correct)

Which bones form the midradioulnar articulation?

Radius, ulna, and interosseous membrane (correct)

Ulna, annular ligament, and interosseous membrane

Radius, ulna, and annular ligament

Ulna, humerus, and radius

What is the primary motion at the proximal radioulnar joint during pronation?

Radial head rotates within the annular ligament

Radius spins on capitulum of humerus

Ulna slides posteriorly (correct)

Ulna slides anteriorly

Which joint is described as a uniaxial, hinge joint in the elbow region?

Humero-ulnar joint Signup and view all the answers

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

Provide stability to the elbow joint Signup and view all the answers

What is the primary purpose of the interosseous membrane in the midradioulnar articulation?

Prevent proximal displacement of radius and ulna during pushing movements Signup and view all the answers

Which of the following is NOT an extrinsic ligament of the wrist?

Palmar interosseous ligament Signup and view all the answers

The anatomic snuffbox is a surface landmark located between which structures?

Trapezium and styloid process of radius Signup and view all the answers

In the close-packed position, the interphalangeal (IP) joints are in:

Full extension Signup and view all the answers

Which of the following is the correct resting position of the metacarpophalangeal (MCP) joints?

Slight flexion Signup and view all the answers

Which of the following statements about the annular pulleys is correct?

They prevent the tendons from bowstringing during finger flexion. Signup and view all the answers

Which of the following bones is NOT a carpal bone?

Metacarpal Signup and view all the answers

What is the term used to describe the anatomical region bounded by the extensor pollicis longus medially and the abductor pollicis longus and extensor pollicis brevis laterally?

Anatomic snuffbox Signup and view all the answers

Which carpal bone is formed within the tendon of the flexor carpi ulnaris muscle?

Pisiform Signup and view all the answers

Which carpal bone is the most commonly fractured bone in the hand?

Scaphoid Signup and view all the answers

What is the term used to describe the angle formed by the long axis of the humerus and the long axis of the ulna?

Carry angle Signup and view all the answers

Which carpal bone articulates with the thumb metacarpal and provides attachment for the transverse carpal ligament?

Trapezium Signup and view all the answers

What is the term used to describe the ligament system that connects the carpal bones and provides stability to the wrist joint?

Intercarpal ligaments Signup and view all the answers

Which carpal bone has a hook-like projection that forms the floor of the tunnel of Guyon?

Hamate Signup and view all the answers

Which carpal bone is the second most commonly dislocated carpal bone?

Lunate Signup and view all the answers

How many bones are present in the wrist and hand?

28 Signup and view all the answers

What is the term used to describe the joint between the radius and the carpal bones?

Radiocarpal joint Signup and view all the answers