Inclusion Criteria:  no history of epilepsy, any known neurological disorder, no psychiatric history, were medication-free during the previous 14-days prior to participation, had not used alcohol within the previous 24-h and were not pregnant  Exclusion Criteria:  Participants will be excluded if they were a musician or a professional typist, or had any contraindications to MRI, significant medical conditions that prevented them from performing the task, or scored less than 3 on the Mini-Cog ™ test.