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Anatomy and Function of the Wrist and Hand Quiz

#1

Which carpal bone is located at the base of the thumb?

Trapezium
Explanation

Trapezium bone is located at the base of the thumb.

#2

What is the anatomical name for the knuckles of the hand?

Phalanges
Explanation

Phalanges are the anatomical name for the knuckles of the hand.

#3

What is the primary function of the flexor digitorum superficialis muscle in the hand?

Flex the fingers
Explanation

Flexor digitorum superficialis muscle primarily flexes the fingers.

#4

Which ligament is responsible for holding the head of the radius in the radial notch of the ulna?

Annular ligament
Explanation

Annular ligament holds the head of the radius in the radial notch of the ulna.

#5

Which bone forms the prominence at the base of the little finger?

Hamate
Explanation

Hamate bone forms the prominence at the base of the little finger.

#6

What is the primary function of the extensor digitorum muscle in the hand?

Extend the fingers
Explanation

Extensor digitorum muscle primarily extends the fingers.

#7

Which nerve is responsible for sensation in the palmar surface of the thumb, index, and middle fingers?

Median nerve
Explanation

Median nerve is responsible for sensation in the palmar surface of specific fingers.

#8

Which muscle is responsible for opposition of the thumb?

Opponens pollicis
Explanation

Opponens pollicis muscle is responsible for opposing the thumb.

#9

In a wrist sprain, which type of ligament is commonly affected?

Collateral ligament
Explanation

Collateral ligament is commonly affected in a wrist sprain.

#10

Which nerve is responsible for motor control of the intrinsic muscles of the hand?

Ulnar nerve
Explanation

Ulnar nerve is responsible for motor control of intrinsic hand muscles.

#11

The pisiform bone is a sesamoid bone located in which tendon in the wrist?

Flexor carpi ulnaris
Explanation

Pisiform bone is located in the tendon of the flexor carpi ulnaris in the wrist.

#12

The first metacarpal bone articulates with which carpal bone?

Trapezium
Explanation

The first metacarpal bone articulates with the trapezium bone.

#13

Which structure is responsible for the production of synovial fluid in the hand joints?

Synovial membrane
Explanation

Synovial membrane produces synovial fluid in hand joints.

#14

What is the function of the lumbrical muscles in the hand?

Extension of the fingers
Explanation

Lumbrical muscles function in extending the fingers.

#15

Which ligament stabilizes the metacarpophalangeal joints and prevents hyperextension?

Collateral ligament
Explanation

Collateral ligament stabilizes metacarpophalangeal joints and prevents hyperextension.

#16

What is the name of the joint formed by the radius and ulna in the forearm?

Radioulnar joint
Explanation

Radioulnar joint is formed by the radius and ulna in the forearm.

#17

Which ligament stabilizes the base of the thumb and prevents excessive abduction?

Ulnar collateral ligament
Explanation

Ulnar collateral ligament stabilizes the base of the thumb.

#18

What is the primary action of the palmaris longus muscle?

Flexion of the wrist
Explanation

Palmaris longus muscle primarily performs flexion of the wrist.

#19

Which artery is the main blood supply to the hand?

Radial artery
Explanation

Radial artery is the main blood supply to the hand.

#20

Which structure forms the roof of the carpal tunnel?

Flexor retinaculum
Explanation

Flexor retinaculum forms the roof of the carpal tunnel.

#21

In which plane does abduction and adduction of the fingers occur?

Frontal plane
Explanation

Abduction and adduction of the fingers occur in the frontal plane.

#22

The superficial palmar arch is formed by an anastomosis between branches of which arteries?

Radial and ulnar arteries
Explanation

Superficial palmar arch is formed by branches of radial and ulnar arteries.

#23

Which muscle is responsible for ulnar deviation of the wrist?

Flexor carpi ulnaris
Explanation

Flexor carpi ulnaris muscle is responsible for ulnar deviation of the wrist.

#24

The ulnar nerve passes through a canal formed by the flexor carpi ulnaris muscle. What is this canal called?

Guyon's canal
Explanation

The canal is called Guyon's canal.

#25

Which muscle is responsible for supination of the forearm?

Supinator
Explanation

Supinator muscle is responsible for supination of the forearm.

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