7 results
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
aracteristic "claw hand ... drop - Occurs after ... spared in this injury ... Carpal Tunnel Syndrome ... Myotomes #diagnosis #neurology
Rock Paper Scissors - Assessment of Nerve Damage in Upper Limb Injuries
Rock - Median Nerve
 •
Fractures • Extension ... of wrist & MCP ... Small muscles of hand ... adduction) OK Sign ... #diagnosis #neurology
Triquetral Fracture
The triquetrum is the second most commonly fractured carpal bone. Look for the "pooping duck
"pooping duck sign ... "pooping duck sign ... flexion and extension ... #Carpal #Radiology ... Orthopedics #Sports #MSK
Scapholunate Dissociation
The spacing between all carpal bones should be 1-2 mm, look for the "Terry Thomas"
• Due to injury ... onto outstretched hand ... extension • Possible ... #Radiology #XRay ... Orthopedics #Sports #MSK
Perilunate Dislocation
On lateral wrist XR, the capitate ("apple") should sit in the lunate ("tea cup") which
extension • ... fracture, median nerve ... injury • ED ... #Carpal #Radiology ... Orthopedics #Sports #MSK
Wartenberg's Sign on Physical Exam

Wartenberg's sign consists of involuntary abduction of the little finger, caused by
action of the extensor ... ulnar nerve neuropathy ... PhysicalExam #clinical #video ... #hand #mask #ulnar ... #neuropathy #neurology
Extensor Carpi Ulnaris (ECU) subluxation 
The Extensor Carpi Ulnaris (ECU), is the must ulnar of the
Extensor Carpi Ulnaris ... Carpi Ulnaris ( ... ), is the must ulnar ... #physicalexam #video ... #msk