UE Compression Neuropathies Flashcards
The Radial Nerve supplies sensation to?
Dorsal hand
The Radial nerve supplies motor to?
Triceps and wrist Extensors
What are 3 possible sites of entrapment of the Radial nerve?
- High on the humerus
- Radial Tunnel
- Wrist
If the Radial Nerve is trapped high on the humerus, what are some symptoms?
Wrist drop
Elbow flexion and triceps issues
If the Radial Nerve is trapped at the radial tunnel, what are some symptoms?
Wrist drop
Pain with supination distal to the lateral epicondyle
If the Radial Nerve is trapped at the wrist, what is the symptom?
Sensory changes on dorsal hand
What causes Radial Nerve entrapment at the radial tunnel and what are the symptoms?
Repetitive rotatory movements
= wrist drop, pain with supination distal to lateral epicondyle
What causes Radial nerve entrapment high on the humerus and what are the symptoms?
Humerus fracture
= Wrist drop, elbow flexion and triceps issues
What 3 syndromes all affect the Median Nerve?
Pronator Syndrome
Anterior Interosseous Syndrome
Carpal Tunnel Syndrome
Pronator Syndrome will have pain where? What nerve?
Median nerve
= Pain in mid forearm, especially with pronation
Anterior Interosseous Syndrome affects which branch of the Median Nerve that does what?
Deep motor branch
– innervates flexors
What is the sign of Anterior Interosseous Syndrome?
CANNOT hold the “OK” sign due to weak flexion ability
Are there sensory symptoms with Anterior Interosseous Syndrome?
NO
What is the most common compression neuropathy?
Carpal Tunnel Syndrome
Carpal Tunnel Syndrome involves compression of what nerve where?
Median Nerve under the flexor retinaculum
Where are the symptoms located for Carpal Tunnel Syndrome?
Thumb, index and middle finger
What is the Gold standard for diagnosis of Carpal Tunnel Syndrome?
EMG
Besides EMG, what 2 other tests can screen for Carpal Tunnel Syndrome?
Tinel’s
Phalen’s
Cannot hold the “OK” sign
Anterior Interosseous Syndrome
– deep motor branch of the median nerve
Pain in the mid forearm
Pronator Syndrome
– Median Nerve
Where does the Ulnar Nerve usually get trapped at?
Cubital Tunnel
When is Ulnar nerve entrapment common?
Baseball pitchers
Prolonged elbow flexion
Elbow external compression on surface
What are the symptoms of Ulnar Nerve entrapment?
4th and 5th fingers affected
– Also pain on the medial elbow
Froment’s Sign
Thumb flexes to pinch paper to index finger
- ULNAR nerve entrapment
