The use of the electromyography instrument connected to the delivery needle appears to be an effective means of assuring that BTX is delivered accurately into the body of the corrugator muscles
The Migraine Procedure is the only approach that doesn't start with the symptoms but rather the cause of the migraine, and is based on the finding that many migraine attacks are triggered by an interaction between the corrugator muscle
and the trigeminal nerve, located above the eyebrows.
1 mL each: two in each corrugator muscle
and one in the procerus muscle.
The third group, 32 percent, had "limited" procedures, including excision of the corrugator muscle
between the eyebrows from the same incision used for their eyelid surgery and injections of botulinum exotoxin Type A (BTX-A).
Patients are capable of their facial expressions, but with less prominence of the frown lines; there is still movement of the few remaining corrugator muscle
fibers and other adjacent muscles of facial expression.