Wrist Joint Anatomy Quiz

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Questions and Answers

What type of joint is the proximal and distal interphalangeal joint classified as?

Saddle joint

Ball and socket joint

Fibrous joint

Synovial – hinge joint (correct)

Which muscle is NOT primarily involved in the flexion of the wrist joint?

Palmaris longus

Extensor digitorum (correct)

Flexor carpi radialis

Flexor digitorum profundus

Which of the following movements does the extensor carpi ulnaris assist with?

Rotation of the wrist

Abduction of the wrist

Adduction of the wrist (correct)

Flexion of the wrist

What is the primary movement facilitated by the Flexor pollicis longus?

Flexion of the thumb Signup and view all the answers

Which muscle assists in both adduction and flexion of the wrist joint?

Flexor carpi ulnaris Signup and view all the answers

What type of joint is the wrist classified as?

Synovial – condylar (ellipsoidal) joint Signup and view all the answers

Which of the following bones does not contribute to the formation of the wrist joint?

Ulna Signup and view all the answers

Which movement is NOT permitted at the wrist joint?

Rotation Signup and view all the answers

What is the primary function of the articular disc at the wrist joint?

Absorb shock and improve fit between bones Signup and view all the answers

What are the components of the articular surfaces of the wrist joint?

Scaphoid, Lunate, Triquetrum, and Articular disc Signup and view all the answers

Which joint type connects each metacarpal to the corresponding proximal phalanx?

Synovial – condylar (ellipsoidal) joint Signup and view all the answers

Regarding the movements at the Metacarpophalangeal Joint, which pair of movements is allowed?

Flexion and Extension, Abduction and Adduction Signup and view all the answers

How does the radial styloid process affect hand movement?

Allows greater adduction than abduction Signup and view all the answers

Which muscle is primarily responsible for the extension of the thumb at the metacarpophalangeal joint (MCPJ)?

Extensor pollicis brevis Signup and view all the answers

Which of the following muscles assists in the flexion of fingers and phalanges?

Palmar interossei Signup and view all the answers

Which muscles are involved in the action of abduction of the fingers?

Dorsal interossei Signup and view all the answers

What is the primary action of the opponens pollicis muscle?

Opposition of the thumb Signup and view all the answers

Which of the following is NOT responsible for the extension of fingers?

Lumbricals Signup and view all the answers

Which muscle contributes to the adduction of the thumb at the carpometacarpal joint?

Adductor pollicis Signup and view all the answers

The action of opposition of the thumb is primarily performed by which muscle?

Opponens pollicis Signup and view all the answers

Which muscles are classified as flexors of the phalanges?

Palmar interossei and Flexor digitorum profundus Signup and view all the answers

Study Notes

Wrist Joint

Type: Synovial - Condylar (ellipsoidal) joint
Articular Surfaces: Distal end of Radius, Articular disc, Scaphoid, Lunate, Triquetrum
Movements: Abduction, Adduction, Flexion, Extension
Note: Ulna does not participate in the wrist joint formation. The radial styloid process extends further distally than the ulnar styloid process, allowing for greater adduction than abduction of the hand.
Note: Flexor Carpi radialis, Flexor Carpi ulnaris, Palmaris longus, Flexor pollicis longus are the muscles responsible for wrist flexion.
Note: Extensor carpi radialis longus, Extensor carpi radialis brevis, Extensor carpi ulnaris, Extensor digitorum, Extensor indicis, Extensor digiti minimi, Extensor pollicis longus are the muscles responsible for wrist extension.
Note: Flexor carpi ulnaris and Extensor carpi ulnaris are responsible for wrist adduction.
Note: Flexor carpi radialis, Abductor pollicis longus, Extensor pollicis longus and brevis, Extensor carpi radialis longus and brevis are responsible for wrist abduction.

Metacarpophalangeal Joint (MCPJ)

Type: Synovial - Condylar (ellipsoidal) joint
Articular Surfaces: Between each metacarpal and the related proximal phalanx
Movements: Flexion, Extension, Abduction, Adduction
Note: Muscles responsible for these movements are not listed in the text.

Interphalangeal Joints (IPJ)

Type: Synovial - Hinge joint
Articular Surfaces: Between adjacent phalanges
Movements: Flexion, Extension
Note: Muscles responsible for these movements are not listed in the text.

Movements at 1st Carpometacarpal (CMPJ) & Metacarpophalangeal (MCPJ) Joints (Thumb)

Flexion (MCPJ): Flexor pollicis brevis, Opponens pollicis.
Extension (MCPJ): Extensor pollicis longus, Extensor pollicis brevis.
Adduction (CMPJ): Adductor pollicis, 1st palmar interosseous.
Abduction (CMPJ): Abductor pollicis longus, Abductor pollicis brevis.
Opposition (Medial rotation of thumb): Opponens pollicis.

Movements of Metacarpophalangeal & Interphalangeal Joints (Medial Four Fingers and Phalanges)

Flexion of Fingers and Phalanges: Lumbricals, Palmar Interossei, Flexor digitorum superficialis, Flexor digitorum profundus.
Extension of Fingers and Phalanges: Extensor digitorum, Extensor indicis, Extensor digiti minimi, Dorsal Interossei.
Adduction of Fingers: Palmar interossei (PAD).
Abduction of Fingers: Dorsal interossei (DAB).

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Description

Test your knowledge on the anatomy and movements of the wrist joint. This quiz covers the structure, functions, and key muscles involved in wrist movement. Ideal for students and professionals in anatomy and physical therapy.