Vonage Holdings Corp. founder, chairman and chief strategist Jeffrey Citron celebrates his company's IPO with then-New York Stock Exchange CEO John Thain after the opening bell on May 24, 2006. The celebration wouldn't last long. An initial public offering (IPO) is often described as a company's coming out party..
Blepharospasm is caused by abnormal brain function in the part of your brain that controls muscles. Symptoms can be triggered by something as minor as stress and being overly tired. Or it could be triggered by a neurological condition. Such conditions would include Touretteâs syndrome or Parkinsonâs disease.
Causes. 1  The cause of minor eyelid twitch is unknown. 2  The essential blepharospasm is a focal dystonia, or abnormal movement, produced by the part of the brain controlling movement. 3  The cause of hemifacial spasm is thought to be an abnormality in the nerve to the facial muscles, which causes the face to twitch.