8 results
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Upper Extremity Dermatomes ... Pronation - C7, C8 Wrist ... Abduction - C8-T1 (ulnar ... Carpal Tunnel Syndrome ... Myotomes #diagnosis #neurology
Spinal Cord Injury by Nerve Root Levels
Spinal Root	Sensory	Motor	Reflex
C4	Acromioclavicular Joint	Respiration	None
C5	Radial Antecubital Fossa	Elbow Flexion	Biceps Reflex
C6	Dorsal Thumb	Wrist Extension	Brachioradialis Reflex
C7	Dorsal
Respiration None C5 Radial ... C6 Dorsal Thumb Wrist ... Flexion None T1 Ulnar ... None T7-T12 See Dermatomes ... differential #diagnosis #Neurology
Scapholunate Dissociation
The spacing between all carpal bones should be 1-2 mm, look for the "Terry Thomas"
Tenderness to anatomic ... extension • Possible ... injuries: distal radius ... #Scaphoid #Carpal ... #Orthopedics #Sports
Perilunate Dislocation
On lateral wrist XR, the capitate ("apple") should sit in the lunate ("tea cup") which
extension • ... associated injuries: Carpal ... fracture (scaphoid ... #Carpal #Radiology ... #Orthopedics #Sports
Triquetral Fracture
The triquetrum is the second most commonly fractured carpal bone. Look for the "pooping duck
, pain with wrist ... flexion and extension ... dislocation, distal radius ... or ulna fractures ... #Orthopedics #Sports
Inverted Supinator Test

Useful for identifying a lesion at the C5-C6 spinal cord level.  Tapping the
C6 spinal cord level ... side of the wrist ... extension and wrist ... #Test #Reflex #neurology ... orthopedics #msk #sports
Median Nerve Anatomy and Function
The Median nerve is the nerve of pre-axial hand function; pinch, delicate
Median Nerve Anatomy ... finger through the Ulnar ... nerve (AIN) palsy leaves ... Median #Nerve #Anatomy ... #diagnosis #neurology
Extensor Carpi Ulnaris (ECU) Synergy Test for ECU Tendinitis

With the patient's hand supinated, the examiner grasps
Extensor Carpi Ulnaris ... The patient radially ... along the dorsal ulnar ... aspect of the wrist ... #orthopedics #sports