August 15, 2013 E-Pearl: Hemifacial spasm
August 15, 2013
Hemifacial spasm is a repetitive, irregular, unilateral, involuntary tonic and/or clonic contraction of the muscles innervated by the ipsilateral facial nerve, with onset usually between 40 and 50 years of age. Imaging (MRI/MRA) may demonstrate vascular compression of the root exit zone of the ipsilateral facial nerve in most cases.  Treatments include medication, botulinum toxin injection, and microvascular decompression. 
Submitted by Wenzhuan He, MD, MS; Resident Physician, Department of Neurology and Neurosciences, NJMS/UMDNJ, Newark, NJ
Dr. He reports no disclosures.