Contribution of the Somatosensory System to Speech Perceptual Processing

These studies test the hypothesis that the repeated pairing of somatosensory inputs with speech sounds, such as occurs during speech motor learning, results in changes to the perceptual classification of speech sounds.

Inclusion Criteria: * right handed adults * no known physical or neurological abnormalities Exclusion Criteria: * patients with: * cardiac pacemaker * surgical clips or values on the heart * implants * metal or metallic fragments in any part of the body * pregnancy * claustrophobia * a personal or family history of epilepsy * currently taking antipsychotic drugs * currently taking antidepressant drugs * currently taking antianxiety drugs.