Anatomy Bootcamp: Erbs and Klumpskes Palsy

characterized by the “waiter's tip deformity,” where the shoulder is adducted, the arm is medially rotated, and the elbow is extended

Erb-Duchenne Palsy

What nerve is affected in Erb-Duchenne Palsy?

C5-C6

Patients experience weakness in elbow flexion and supination (musculocutaneous nerve) and wrist/elbow extension (triceps and wrist extensors). Which injury is this?

Erb-Duchenne Palsy

Patients experience weakness in the elbow and wrist but also has a sensory loss of the lateral forearm. Which injury is this?

Erb-Duchenne Palsy

Which nerve is affected in Erb-Duchenne Palsy?

musculocutaneous nerve

is a condition characterized by the inability to extend the wrist and fingers, causing them to hang limp, often resulting from radical nerve compression or injury. Which injury is this?

wrist drop (radial nerve palsy)

What nerve is affected in wrist drop?

radial nerve

What muscles are involved in wrist drop? hint; BEST

Brachioradialis, Extensor (ECRL, ECRB), Supinator, and Triceps

Severing the posterior interosseous nerve (PIN) results in paralysis of the posterior compartment, and there is sensory loss over the posterior hand. Which injury is this?

Wrist drop

A condition caused by compression, trauma, or injury to the median nerve, resulting in hand weakness, numbness, and potential muscle wasting, particularly affecting thumb movement. Which injury is this?

Median Nerve Palsy

Which nerve is affect in Median Nerve Palsy?

Median nerve

The first two lumbricals are paralyzed, and opposition of the thumb is impossible. Which injury is this?

Median Nerve Palsy

A rare peripheral nerve disorder causing motor deficits in the forearm, typically manifesting as an inability to make the "OK sign" (pinching the index finger and thumb). Which injury is this called?

Anterior Interosseous Syndrome (AIN Syndrome)

What nerve is affected in Anterior Interosseous Syndrome (AIN Syndrome)?

median nerve

Patient has significant weakness in the Flexor Pollicis Longus (FPL), Flexor Digitorum Profundus, and Pronator Quadratus. There is no sensory deficits. Which injury is this?

Anterior Interosseous Syndrome (AIN)

Is a lower brachial plexus palsy involving C8 and 𝑇1 nerve roots, causing weakness/paralysis in the intrinsic hand muscles and wrist flexors. Which injury is this called?

Ulnar Nerve Palsy (Klumpke Paralysis)

Which nerve is affected in Klumpke Paralysis?

ulnar nerve (C8-T1)

Patient presents to the hospital with a hand injury. The injury is known as the “Claw Hand,” where the 4th and 5th MCP joints hyperextend. What injury is this called?

Ulnar Nerve Palsy (Klumpke Paralysis)

a condition where the shoulder blade protrudes from the back rather than lying flat, typically caused by damage to nerves (like the long thoracic nerve) or weakness in muscles such as the serratus anterior, trapezius, or rhomboids. Which condition is this called?

Winged scapula

What nerve is affected in wing scapula?

long thoracic nerve

What muscles are involved in the injury of the winged scapula?

Serratus anterior

Which muscles normally protracts the scapula and "glues" its medial border to the thorax?

Serratus anterior