9 results
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
aracteristic "claw hand ... nerve in the radial ... spared in this injury ... Anterior Shoulder Dislocation ... Myotomes #diagnosis #neurology
Localizing Extraocular Movement Disorders
 • CN Ill (Oculomotor) Nerve Palsy 
 • CN IV (Trochlear) Nerve
palsyMedial ... Fasciculus (MLF) Iniury ... • One-and-a-half ... ophthalmology #neurology ... #differential #
Left Wrist Drop - Radial Nerve Palsy on Physical Examination

Left hand drop due to compression of
Nerve Palsy on ... Examination Left hand ... #Nerve #Palsy # ... orthopedics #msk #sports ... #neurology
Posterior Elbow Dislocation
The elbow is the second most commonly dislocated major joint in adults and the
onto outstretched hand ... anterior interosseous nerve ... ), ligamentous injury ... brachial artery injury ... #Orthopedics #Sports
Radial Nerve Anatomy and Function
The Radial nerve is the nerve of elbow, wrist and digital extension.
nerve injury ... nerve injury ... • Thus a PIN palsy ... palsy recovers there ... #diagnosis #neurology
Perilunate Dislocation
On lateral wrist XR, the capitate ("apple") should sit in the lunate ("tea cup") which
Perilunate Dislocation ... , triquetrum), radial ... styloid fracture, median ... nerve injury ... #Orthopedics #Sports
Diplopia - Double Vision - Differential Diagnosis Algorithm
Clinical Pearls:
 • Diplopia is almost always binocular.
 •
Double Vision - Differential ... • CN VI palsy ... • Neurologic ... Cataract/Lens Dislocation ... depress when looking medially
Posterior Knee Dislocation Injury
Specifically, POSTERIOR KNEE DISLOCATIONS can have significant associated injury that needs unique approach
Neurologic deficit ... vascular imaging or serial ... Neurologic injuries ... Common peroneal nerve ... extension, Tibial nerve
CNS Infection in HIV / AIDS - Differential Diagnosis Framework

Principles of HIV-Associated CNS Opportunistic Infections:
 •
in HIV / AIDS - Differential ... headache, altered mental ... hearing loss, palsy ... of the abducens nerve ... CNS #Infections #differential