61 results
Midcarpal Instability (MCI) of the Wrist

Intrinsic Midcarpal Instability
Usually affects young, hypermobile patients.
It is due to progressive
Instability (MCI) of the Wrist ... The proximal carpal ... extensors (ECU, ... ECRB) The distal carpal ... #msk #orthopedics
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
Thoracodorsal Nerve Elbow ... Musculocutaneous Nerve Elbow ... Extension C7 Radial ... Nerve Wrist Extension ... #MuscleGroups #MSK
Perilunate Dislocation
On lateral wrist XR, the capitate ("apple") should sit in the lunate ("tea cup") which
Dislocation On lateral wrist ... extension • ... associated injuries: Carpal ... #Carpal #Radiology ... Orthopedics #Sports #MSK
Triquetral Fracture
The triquetrum is the second most commonly fractured carpal bone. Look for the "pooping duck
commonly fractured carpal ... ulna, pain with wrist ... flexion and extension ... Triquetrum #Fracture #Wrist ... Orthopedics #Sports #MSK
Scapholunate Dissociation
The spacing between all carpal bones should be 1-2 mm, look for the "Terry Thomas"
spacing between all carpal ... box, pain with wrist ... extension • Possible ... #TerryThomas #Wrist ... Orthopedics #Sports #MSK
Most Common Carpal Bone Fractures by Frequency
 • Scaphoid - 50-80%
 • Triquetral - 5-20%
 •
Most Common Carpal ... Pal @drdevrad #Carpal ... Bone #Fractures #wrist ... frequency #radiology #msk
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
- C6, C7, C8 Elbow ... Pronation - C7, C8 Wrist ... C7 (median) • Extension ... Horner Syndrome Wrist ... Carpal Tunnel Syndrome
Age of Ossification of Carpal Bones
Capitate - 1 Month
Hamate - 2 Months
Triquetral - 3 Years
Lunate -
Ossification of Carpal ... ossification of the carpal ... Ossification #Age #Carpal ... #Bones #wrist # ... mnemonic #diagnosis #msk
Maudsley's Test for Lateral Epicondylitis ("Tennis Elbow")

With the wrist prone, resist extension of the 3rd digit,
Epicondylitis ("Tennis Elbow ... ") With the wrist ... prone, resist extension ... movement stresses the extensor ... #physicalexam #msk
Maudsley's Test for Lateral Epicondylitis ("Tennis Elbow")

With the wrist prone, the patient attempts extension of the
Epicondylitis ("Tennis Elbow ... ") With the wrist ... patient attempts extension ... movement stresses the extensor ... #physicalexam #msk