The Structure and Function of the Wrist and Hand

Match the following anatomical terms to their correct locations in the hand diagram:

• Radius

• Wrist bones

• Carpus

• Palm bones

• Metacarpals

• Forearm bone on the thumb side

• Ulna

• Forearm bone on the little finger side

The Distal Radioulnar Joint (DRUJ) is a type of synovial joint known as a (a)   joint.

• Hinge
• Pivot
• Ellipsoid
• Saddle

​ The (a)   separates the distal radioulnar joint (DRUJ) from the radiocarpal (wrist) joint.

• Triangular fibrocartilaginous disc
• Scapholunate ligament
• Flexor retinaculum
• Ulnar collateral ligament

Which muscles are primarily responsible for pronation at the DRUJ?

• Pronator teres and pronator quadratus

• Supinator and biceps brachii

• Flexor carpi radialis and pronator teres

• Flexor carpi ulnaris and pronator quadratus

Which muscles are primarily responsible for supination at the DRUJ?

• Pronator teres and pronator quadratus

• Supinator and biceps brachii

• Flexor carpi radialis and supinator

• Flexor carpi ulnaris and supinator

During pronation at the DRUJ, the radius slides (a)   relative to the ulna.

• Anteriorly
• Posteriorly
• Laterally
• Medially

During supination at the DRUJ, the radius slides (a)   relative to the ulna.

• Posteriorly
• Anteriorly
• Medially
• Laterally

The three bones that form the proximal carpal row involved in the Wrist (Radiocarpal) Joint are (a)   .

• Scaphoid, Lunate, Triquetrum
• Scaphoid, Capitate, Hamate
• Trapezium, Trapezoid, Capitate
• Lunate, Hamate, Trapezium

The joint at the thumb base that allows opposition is a (a)   joint.

• Saddle
• Hinge
• Condyloid
• Glidding

For the 2nd-5th carpometacarpal joints (CMCs), the carpal bones that articulate with the bases of the respective metacarpals are (a)   .

• Trapezoid, Capitate, Hamate
• Scaphoid, Lunate, Triquetrum
• Pisiform, Trapezium, Capitate
• Trapezium, Scaphoid, Hamate