This project will apply transcranial direct current stimulation (tDCS) to multiple brain areas to evaluate the effects as a potential treatment for laryngeal dystonia (formerly spasmodic dysphonia).

Baseline neuroimaging data will be acquired from all participants via MRI, EEG. Each participant will be seen for multiple testing sessions over a five day period. LD participants will undergo the neuromodulation (HD-tDCS Stimulation) for twenty minutes while engaged in watching videos/movies or performing a word production task.

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.

Investigators do not have consent for patients for sharing their data yet, if that changes, de-identified data will be shared.

Subjects and staff will be blind during the study and that subjects will be told of their assignment at the follow-up visit.