Hand Anatomy and Function

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Where is the carpal tunnel located?

On the dorsal side of the wrist

In the forearm

In the hand

On the palmar side of the wrist (correct)

What structures pass through the carpal tunnel?

Ulnar nerve and extensor muscles

Median nerve and flexor muscles (correct)

Radial nerve and abductor muscles

Median nerve and extensor muscles

Where do the intrinsic muscles of the hand originate from?

Bones of the arm

Bones of the hand (correct)

Bones of the shoulder

Bones of the wrist

What causes carpal tunnel syndrome?

Entrapment of the median nerve Signup and view all the answers

What is responsible for drainage and innervation in the hand?

Nerves Signup and view all the answers

What is the floor of the carpal tunnel composed of?

Carpal bones Signup and view all the answers

Which nerve passes through the carpal tunnel and can cause numbness and weakness in the hand?

Median nerve Signup and view all the answers

Which muscle is responsible for abducting the thumb?

Abductor pollicis brevis Signup and view all the answers

Which muscle flexes the thumb?

Flexor pollicis brevis Signup and view all the answers

What is the main function of the thenar muscles?

Thumb movements Signup and view all the answers

Which nerve innervates the abductor pollicis brevis muscle?

Median nerve Signup and view all the answers

What is the action of the opponens pollicis muscle?

Draws 1st metacarpal laterally to oppose thumb toward center of palm Signup and view all the answers

Which nerve innervates the flexor pollicis brevis muscle?

Median nerve Signup and view all the answers

What is the origin of the adductor pollicis muscle?

Oblique head – bases of 2nd and 3rd metacarpals, Transverse head – anterior surface of body of 3rd metacarpal bone. Signup and view all the answers

What is the primary action of the adductor pollicis muscle?

Adducts thumb towards middle digit Signup and view all the answers

Hand Anatomy and Function

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Questions and Answers

Where is the carpal tunnel located?

What structures pass through the carpal tunnel?

Where do the intrinsic muscles of the hand originate from?

What causes carpal tunnel syndrome?

What is responsible for drainage and innervation in the hand?

What is the floor of the carpal tunnel composed of?

Which nerve passes through the carpal tunnel and can cause numbness and weakness in the hand?

Which muscle is responsible for abducting the thumb?

Which muscle flexes the thumb?

What is the main function of the thenar muscles?

Which nerve innervates the abductor pollicis brevis muscle?

What is the action of the opponens pollicis muscle?

Which nerve innervates the flexor pollicis brevis muscle?

What is the origin of the adductor pollicis muscle?

What is the primary action of the adductor pollicis muscle?

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