Efficacy and Safety of TMS for the Preemptive Treatment of Migraine With Aura

In the Lead-in Phase participants will use a Personal Digital Assistant (PDA) to keep an electronic diary of their migraine episodes. During a migraine episode, as well as the time in between headaches, the PDA prompts the participant to answer questions. Each evening, the participant will place the PDA into an electronic telephone cradle, and the information will be transmitted electronically from the PDA to the data management team to assess the frequency of migraine episodes and participant proficiency with the PDA. During this one month period, the participant must experience at least one migraine with aura episode to enter the Treatment Phase.

After one month, the participant will return to the clinic with their PDA and will enter the Treatment Phase to be randomized to either the TMS only group or the Sham stimulation only group. Participant will enter information into the PDA for three migraine auras treated or three months, which ever comes first.

Inclusion criteria

• 18 - 65 years
• Will comply with requirements of the protocol
• Have a consistent history of migraine with visual aura of at least one year

•>30% of episodes have a visual aura preceding headaches

• Approximately 90% of the time have moderate or severe headaches following their aura
• Fulfills the International Classification of Headache Disorders, 2nd Edition(ICHD-II) criteria(for migraine headache with aura after administration of a clinical interview by study personnel
• Has a history of 1-8 migraine headache episodes with aura per month
• Can differentiate a migraine headache from other types of headaches
• Participant is post-menopausal, sterilized, not breastfeeding, her pregnancy test is negative

Exclusion criteria

• Women who are pregnant or breastfeeding
• Routinely experiences any other type of headache that would confound discrimination from migraine headache with aura
• Have migraine with prolonged aura > 60 minutes
• Have headaches due to other underlying pathology
• Have headaches related to head or neck trauma
• Overuse headache medications:
• Has an intracranial metallic or Transcranial Magnetic Stimulation (TMS) implant or other metallic implants
• Has cardiac pacemaker or any other implanted electronic device
• Has any known history of alcohol abuse, drug dependency, or significant psychiatric illness in the previous 12 months
• Having any medical condition, including but not limited to: clinically significant renal or hepatic disease; uncontrolled hypertension; clinically significant coronary vascular disease not stable for the past 6 months; personal or family history of seizures or taking medications for seizures or drugs that may lower seizure threshold, cerebral vascular ischemia; infarct; hemorrhage, or other central nervous system disease (e.g., multiple sclerosis, amyotrophic lateral sclerosis); unstable metabolic disease, hypoglycemia or diabetes; malignancy within the past 5 years excluding cutaneous basal cell carcinoma; tuberculosis
• Has participated in any other investigational study within the previous 30 days.
• Cannot place the device within 1 cm of the scalp.