RecruitingDevice studyMigraine in AdolescentsAim 1. To identify psychophysical and neural factors predicting migraine onset in adolescents Aim 2a. To determine hormonal, psychophysical, and neural changes associated with migraine onset. Aim 2b. To identify the temporal relationships between hormonal, psychophysical, and neural changes preceding vs. following migraine onset. Aim 3. To identify psychophysical and neural factors predicting migraine prognosis in adolescents with migraine.