Question 1

When teaching a client strengthening exercises for wrist radial deviation,which of the following is the BEST position to place him in to start the exercise?

Accepted Answer

The best position for wrist radial deviation exercises is with the forearm in a neutral position, thumb up, allowing for the most effective movement against gravity.

Question 2

Which muscle originates on the lateral epicondyle of the humerus and inserts at the base of the third metacarpal?

Accepted Answer

The muscle that originates on the lateral epicondyle of the humerus and inserts at the base of the third metacarpal is the extensor carpi radialis brevis. Palmaris longus originates on the medial epicondyle of the humerus, while extensor carpi radialis longus originates on the lateral supracondylar ridge of the humerus. Extensor carpi ulnaris originates on the lateral epicondyle of the humerus and the posterior border of the ulna, and inserts at the base of the fifth metacarpal.

Question 3

Which muscle originates on the medial epicondyle of the humerus and inserts on the palmar fascia?

Accepted Answer

The muscle that originates on the medial epicondyle of the humerus and inserts on the palmar fascia is the Palmaris longus muscle.

Question 4

The bony landmark located on the distal medial side of the humerus is the

Accepted Answer

The distal medial side of the humerus refers to the end of the bone closest to the elbow joint. The bony landmark located here is the medial condyle, which is a prominent protrusion on the inner side of the humerus. The supracondylar ridge is also located on this side of the bone, but it is not a specific landmark and is a more generalized area of bone. The lateral condyle is located on the opposite side of the bone, and the styloid process of the humerus is a small projection on the distal lateral side of the bone.

Question 5

Which wrist muscle is the direct antagonist of the palmaris longus?

Accepted Answer

The answer of Which wrist muscle is the direct antagonist...

Question 6

The ligament that attaches to the styloid process of the radius and to the scaphoid and trapezium bones is the

Accepted Answer

The radial collateral ligament attaches to the styloid process of the radius and extends to the scaphoid and trapezium bones, providing lateral stability to the wrist joint.

Question 7

When the extensor carpi ulnaris and flexor carpi ulnaris contract simultaneously,which motions are neutralized?

Accepted Answer

When the extensor carpi ulnaris and flexor carpi ulnaris contract simultaneously, they neutralize each other's actions in terms of flexion and extension of the wrist, effectively stabilizing the wrist in that plane.

Question 8

A person needing to stretch the wrist flexors needs to put the wrist in which of the following positions?

Accepted Answer

To stretch the wrist flexors, the wrist should be put in extension. This position lengthens the flexor muscles, which are located on the palmar side of the forearm, thereby providing an effective stretch.

Question 9

When the flexor carpi radialis and the extensor carpi radialis longus contract simultaneously,which motion results?

Accepted Answer

The flexor carpi radialis and the extensor carpi radialis longus are muscles that work in opposite directions to create wrist movements. The flexor carpi radialis is responsible for wrist flexion and radial deviation, while the extensor carpi radialis longus is responsible for wrist extension and radial deviation. When they contract simultaneously, the dominant motion is radial deviation, which means the wrist moves towards the thumb (which is the side of the radius bone). Therefore, the correct answer is C) Wrist radial deviation.

Question 10

The PT plan of care directs you to do ISOM strengthening of the wrist extensors in a shortened position.To do this you would place the wrist in which of the following positions?

Accepted Answer

Isometric strengthening in a shortened position for the wrist extensors requires placing the wrist in extension, as this position shortens the extensor muscles.

Question 11

If the emphasis for the above exercise is eccentric strengthening,how would you instruct your client to pace the exercise?

Accepted Answer

Eccentric strengthening involves emphasizing the "down" motion or the lengthening of the muscle fibers under resistance. This is achieved by controlling the descent of the weight or load, rather than allowing it to drop. Therefore, instructing the client to pace the exercise with emphasis on the "down" motion will promote eccentric strengthening.

Question 12

Paralysis of the flexor carpi ulnaris muscle could indicate trauma to which of the following nerves?

Accepted Answer

The flexor carpi ulnaris muscle is innervated by the ulnar nerve. Therefore, paralysis of this muscle would indicate trauma to the ulnar nerve.

Question 13

The three wrist extensors are innervated by which nerve?

Accepted Answer

The three wrist extensors (namely the extensor carpi radialis brevis, extensor carpi radialis longus, and extensor carpi ulnaris) are innervated by the radial nerve, which supplies the extensor muscles of the arm, forearm, wrist, and hand. The median nerve primarily innervates the muscles of the anterior forearm, while the ulnar nerve innervates the muscles of the intrinsic hand and some forearm muscles. The musculocutaneous nerve innervates the muscles of the anterior upper arm.

Question 14

If you are instructed to work on closed-chain upper extremity activity and you have your patient stand and place her hand on a table with her fingers facing forward and rock forward to touch an object with the other hand,which motion is occurring at the wrist that is on the table?

Accepted Answer

When the patient places her hand on the table with her fingers facing forward and rocks forward to touch an object with the other hand, the wrist on the table is in extension.

Question 15

If a person repeatedly falls on an outstretched hand (extended wrist)while snowboarding,they are at increased risk for a sprain to which of the following ligaments?

Accepted Answer

The repeated falling on an outstretched hand while snowboarding can put stress on the palmar radiocarpal ligament, which is responsible for maintaining stability in the wrist joint. This can lead to a sprain of the ligament. The other ligaments mentioned (radial collateral, ulnar collateral, and dorsal radiocarpal) may also be affected by wrist injuries, but they are not specifically associated with this type of activity.

Question 16

The flexor carpi radialis and flexor carpi ulnaris are agonists in which of the following motions?

Accepted Answer

Flexor carpi radialis and flexor carpi ulnaris are both muscles that flex the wrist joint.

Question 17

Which muscle originates on the medial epicondyle of the humerus and inserts on the base of the second metacarpal?

Accepted Answer

The muscle that originates on the medial epicondyle of the humerus and inserts on the base of the second metacarpal is the flexor carpi radialis.

Question 18

Which muscle originates on the lateral epicondyle and inserts on the base of the fifth metacarpal?

Accepted Answer

The Extensor carpi ulnaris muscle originates on the lateral epicondyle of the humerus and inserts on the base of the fifth metacarpal, making it responsible for extending and adducting the wrist.

Quiz 12: Wrist Joint