A sham coil will be applied to the scalp after the resting motor threshold is determined. Patients will be able to hear the sound and feel the vibration of sham coil, but will not experience any effective stimulation.

Number of headaches/2 weeks

Headache Impact Test (HIT-6): a global measure of headache impact. Addresses the 6 categories of headache impact including social, role, and cognitive functioning, vitality, psychological distress, and severity of headache pain. Each question is scored on a 5 point scale: never, rarely, sometimes, very often, and always. Total score can range from 36-78, with higher total score indicating greater impact.

Patient Health Questionnaire - 9 (PHQ-9): a 9 item tool used to assess the presence and severity of depressive symptoms. Each item is rated based on the frequency of occurrence in the past two weeks and is graded on a 0-3 scale (0=not at all, 1= several days, 3= nearly every day). Finally, one question rates how difficult problems have made completing tasks at home, doing work, and getting along with people. This is graded on a 4 point scale from not difficult at all to extremely difficult. Total score is calculated out of 27, with a values indicating severity of depression (i.e. 0-4= none to mild, 5-9 = mild, 10-14 = moderate, 15-19 = moderately severe, and 20-27 = very severe).

Generalized Anxiety Disorder (GAD-7): a 7-item tool where similar to the PHQ-9, each item is rated on frequency over a 2 week period based on a 0-3 scale (0=not at all, 1= several days, 3= nearly every day). Total score GAD-7 total score ranges from 0 to 21, with scores indicating severity of anxiety (i.e. 0-5= mild, 6-10 = moderate, 11-15 = moderately severe, 16-21 = very severe).

PTSD Checklist for DSM-5 (PCL-5): is a paper and pencil self-report measure, which rates the severity of PTSD symptoms over the past month. It is composed of 4 subscales, and is a total of 20 items long. Each item corresponds to the 20 criteria for PTSD defined in the DSM-5.

Montreal Cognitive Assessment (MoCA):a paper and pencil global cognitive assessment tool which measures 7 neurocognitive domains including visuospatial/executive function, naming, memory, attention, language, abstraction and orientation. It is composed of 16 items and scored out of 30 points.

The QOLIBRI is a health-related quality of life instrument developed specifically for patients who have experienced a traumatic brain injury. It has 6 subscales and a total of 37 items. The tool is divided into two sections. The first addresses satisfaction with health related quality of life, characterized by cognition, self, autonomy in daily life, and social aspects. These are reported on a 1-5 scale with 1 defined as "not at all satisfied" and 5 as "very satisfied". The second section is related to "feeing bothered by" emotions and physical problems. They are again scored from 1-5, however 1 is defined as "very bothered" and 5 as "not bothered at all". The score from all subscales are totaled, and then divided by the number of responses. This gives a mean score, which can range from 1-5. Next, 1 is subtracted from the mean and then multiplied by 25 to produce a score on the 0-100 scale (0=worst possible quality of life, 100= best possible quality of life).

Rivermead Post-concussion Symptoms Questionnaire (RPQ): an instrument developed to assess the frequency and severity of 16 common post-concussion symptoms. On this paper and pencil tool, patients rate the extent to which their symptoms (compared to their pre-injury levels) have become more problematic over the past 24 hours using a rating scale from 0-4 (0=not experienced, 1=no more of a problem, 2=mild problem, 3=moderate problem, 4=severe problem). A total symptom score is calculated out of 64.

British Columbia Post-concussion symptom inventory (BC-PSI): a 16 item instrument, where 13 questions are used to assess the frequency and intensity of post-concussion symptoms as defined by ICD-10 criteria over the past two weeks (i.e. headaches, dizziness or light-headedness, nausea, fatigue, phonophobia, sadness, nervousness or tension, temper problems, poor concentration, memory problems, reading difficulty, and sleep disturbance). Severity is rated from 0-5 (6 point scale) where 0 is defined as "not at all" and 5 as "constantly". Intensity is also rated from 0-5, where 0 is defined as "not at all" and 5 as "very severe problem". The two items are then multiplied (frequency x intensity) for each item. This is subsequently converted to item total scores where: 0-1=0, 2-3=1, 4-6=2, 8-12=3, and ≥15=4. Scores from 1-2 signify mild symptoms and ≥3 moderate to severe symptoms, which can be considered clinically significant.