tDCS for Laryngeal Dystonia

Inclusion Criteria: * Participants must be clinically evaluated for the diagnosis of LD or have the proof of LD diagnosis. (Not applicable for control participants) * No other known or history of speech, voice disorder other than LD. * Provision of signed and dated informed consent form. * Stated willingness to comply with all study procedures and availability for the duration of the study * Must not be pregnant. Exclusion Criteria: * All individuals who do not meet the above mentioned criteria are excluded from the study. * Subjects with a history of epilepsy or depression or is claustrophobic.