Ulnar Nerve Pathways Quiz

1. The nerve then divides into _______ and ______ and continues into the fingers and hand

Superficial and lateral

Deep and medial

Deep and lateral

Superficial and deep

The nerve mentioned in the question divides into two branches, one that is closer to the surface of the body (superficial) and another that is deeper within the body (deep). These branches continue into the fingers and hand, allowing for sensory and motor functions in these areas.

Explanation

The nerve mentioned in the question divides into two branches, one that is closer to the surface of the body (superficial) and another that is deeper within the body (deep). These branches continue into the fingers and hand, allowing for sensory and motor functions in these areas.

2. What muscle does the nerve them follow between and deep to?

Extensor carpi ulnaris

Flexor carpi ulnaris

Extensor carpi radialis longus

Flexor carpi radialis

The correct answer is flexor carpi ulnaris. This muscle is innervated by the ulnar nerve, which runs between and deep to the flexor carpi ulnaris muscle.

Explanation

The correct answer is flexor carpi ulnaris. This muscle is innervated by the ulnar nerve, which runs between and deep to the flexor carpi ulnaris muscle.

3. At the elbow, the nerve goes ______ to the _______ epicondyle of the humerus and _________ to the olecranon process

Posterior, lateral, medial

Posterior, medial, medial

Anterior, medial, lateral

Anterior, lateral, lateral

The correct answer is posterior, medial, medial. At the elbow, the nerve goes posterior to the medial epicondyle of the humerus and medial to the olecranon process.

Explanation

The correct answer is posterior, medial, medial. At the elbow, the nerve goes posterior to the medial epicondyle of the humerus and medial to the olecranon process.

4. The nerve then continues over carpal tunnel between which two structures

Hook of hamate

Scaphoid tubercle

Listers tubercle

Pisiform

The nerve continues over the carpal tunnel between the hook of hamate and the pisiform. These two structures are located in the wrist. The hook of hamate is a bony projection on the palm side of the wrist, while the pisiform is a small bone located near the base of the palm. The nerve passes between these structures as it travels through the carpal tunnel, which is a narrow passageway in the wrist.

Explanation

The nerve continues over the carpal tunnel between the hook of hamate and the pisiform. These two structures are located in the wrist. The hook of hamate is a bony projection on the palm side of the wrist, while the pisiform is a small bone located near the base of the palm. The nerve passes between these structures as it travels through the carpal tunnel, which is a narrow passageway in the wrist.

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5. Starting from the brachial plexus, match the pathway of the nerve with the landmark or muscle

Dives under the

then under the

then follows posterior wall of

then follows along

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6. Select all the muscles that are innervated by the Ulnar nerve

Extensor carpi ulnaris

Flexor carpi ulnaris

Flexor digitorum profundus

Extensor digitorum

Hypothenar muscles

Abductor pollicis

Pronator teres

Thenar eminence

The ulnar nerve innervates the flexor carpi ulnaris, flexor digitorum profundus, hypothenar muscles, and thenar eminence. These muscles are all located in the forearm and hand. The flexor carpi ulnaris is responsible for flexing and adducting the wrist. The flexor digitorum profundus flexes the fingers. The hypothenar muscles are a group of muscles located in the palm of the hand that control movement of the little finger. The thenar eminence is a group of muscles located at the base of the thumb that control movement of the thumb.

Explanation

The ulnar nerve innervates the flexor carpi ulnaris, flexor digitorum profundus, hypothenar muscles, and thenar eminence. These muscles are all located in the forearm and hand. The flexor carpi ulnaris is responsible for flexing and adducting the wrist. The flexor digitorum profundus flexes the fingers. The hypothenar muscles are a group of muscles located in the palm of the hand that control movement of the little finger. The thenar eminence is a group of muscles located at the base of the thumb that control movement of the thumb.

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