34 results
Mytomes - Segmental Innervation of Muscles
Shoulder	Abduction	C5	Axillary Nerve
Shoulder	Adduction	C6-C8	Thoracodorsal Nerve
Elbow	Flexion	C5	Musculocutaneous Nerve
Elbow	Extension	C7	Radial Nerve
Wrist	Extension	C6	Radial Nerve
Fingers	Flexion	C8	Median Nerve
Fingers	Abduction	T1	Ulnar Nerve
Hip	Flexion	L2	Nerve to Psoas
Hip	Extension	S1	Inferior Gluteal
Nerve Fingers ... Nerve Fingers ... Extension S1 Inferior ... #MuscleGroups #MSK ... #Orthopedics #Neurology
Anterior Shoulder Dislocation - ED Management
The shoulder is the most commonly dislocated major joint, 95% of
Anterior Shoulder ... Axillary nerve injury ... neurovascular injury ... #Orthopedics #Sports ... #MSK
Distal Radius Fracture 
Distal radius fracture is the most common orthopedic injury. Here's a quick summary.
•
onto outstretched hand ... styloid fracture, median ... ) • ED Management ... reduction using finger ... #Orthopedics #MSK
Perilunate Dislocation
On lateral wrist XR, the capitate ("apple") should sit in the lunate ("tea cup") which
no longer sitting ... styloid fracture, median ... nerve injury ... #Orthopedics #Sports ... #MSK
Femoral Head Fracture: Pathogenesis and clinical findings
 • Posterior hip dislocation -> Impaction force from femoral
: Pathogenesis and ... Avulsion or shearing injury ... -> Ligaments tear ... FemoralHead #Fractures #msk ... signs #symptoms #orthopedics
Mallet Finger
Absence of a fracture does NOT exclude Mallet finger, the extension function of the DIP
: Hyperflexion injury ... fracture • ED Management ... Discharge with orthpedic ... #Hand #Orthopedics ... #MSK
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Motor Function Shoulder ... ) Finger: • Mexion ... Supinator - C5, C6 • Finger ... spared in this injury ... Anterior Shoulder
Posterior Elbow Dislocation
The elbow is the second most commonly dislocated major joint in adults and the
injuries: Fractures (medial ... , neuropraxia (anterior ... ), ligamentous injury ... #Orthopedics #Sports ... #MSK
Lachman test in ACL-deficient Knee

This patient has pathologic varus alignment across the knee and a chronic
a chronic ACL tear ... test #ACL #Knee #Injury ... #PhysicalExam #Sports ... #Ortho #anterior ... cruciate #ligament #msk
Interphalangeal Joint Dislocation
Interphalangeal joint dislocations almost always occur dorsally, look for associated avulsion fractures! Here's a
and PIP joints ... ligaments (prevent radial ... Hyperextension injury ... #Hand #Orthopedics ... #MSK