Hemifacial spasm is a rare disorder that presents with uncontrolled twitching of the facial musculature on one side or the other. This condition is due to irritation of the facial nerve at the brainstem from a blood vessel. The disorder can be temporarily treated with botulinum toxin injections. However, a more permanent cure involves microsurgical decompression of the offending blood vessel off of the facial nerve. Dr. Ghosh uses a meticulous microsurgical technique to identify the facial nerve. He uses special facial nerve monitoring to avoid injury to the facial nerve. He also uses special auditory monitoring to avoid injury to the hearing apparatus and is able to effectively decompress the facial nerve and treat the spasm.