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Bell's palsy
There are many different causes of Facial Nerve Palsy. However, the commonest
cause of unilateral facial
Bell's palsy There ... many different causes ... of Facial Nerve ... Palsy. ... the commonest cause
Causes of Facial Weakness - Differential Diagnosis Algorithm
Forehead Sparing = Central cause
  - Most commonly
Causes of Facial ... Sparing = Central cause ... (2% of facial nerve ... palsy) - Unilateral ... : Bell's Palsy (
Bell's Palsy
Bell’s Palsy is a damage, acute weakness, or paralysis of the Facial nerve (7th CN),
Bell's Palsy Bell ... of the Facial nerve ... an identifiable cause ... when the facial nerve ... The cause is unknown
Localizing Extraocular Movement Disorders
 • CN Ill (Oculomotor) Nerve Palsy 
 • CN IV (Trochlear) Nerve
Ill (Oculomotor) Nerve ... Palsy • CN IV ... (Trochlear) Nerve ... (Abducens) Nerve ... Skew Deviation Casey
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Conditions Erb's Palsy ... to the radial nerve ... Saturday night palsy ... in the median nerve ... axillary nerve
Physical exam findings of various ocular palsies; image courtesy of the BMJ

R 3rd nerve palsy
R 4th
the BMJ R 3rd nerve ... palsy R 4th nerve ... palsy R 6th nerve ... palsy #Ocular ... CranialNerve #Palsies #Palsy
Bell's Palsy - Facial Nerve Palsy on Exam

#Bells #Palsy #Facial #Nerve #Palsy #CN5 #CNVII #clinical #video
Bell's Palsy - Facial ... Nerve Palsy on ... Exam #Bells #Palsy ... #Facial #Nerve ... #Palsy #CN5 #CNVII
Pathological Optic Disc Cupping

Note cup-to-disc ratio at least 0.8 (physiologic limit of 0.5).

Thinning of optic disc
Usual cause is glaucoma ... Glaucoma causes ... death of optic nerve ... supporting glia partly
Diplopia - Double Vision - Differential Diagnosis Algorithm
Clinical Pearls:
 • Diplopia is almost always binocular.
 •
• CN VI palsy ... a mass as the cause ... Horizontal (Cranial Nerve ... Trauma Cranial Nerve ... Trauma Cranial Nerve
Schematic examples of the cause of acute mitral regurgitation. 
LV, left ventricle; PM, papillary mucle; SAM,
examples of the cause ... heart.bmj.com/content/early ... MR #Diagnosis #Causes ... #Differential #Cardiology