Objective: The study aimed to achieve two objectives: 1) Conduct a preliminary investigation of the cortical silent period recorded in the cricothyroid muscle in healthy individuals; 2) Perform a preliminary investigation of the cortical silent period recorded in the cricothyroid and thyroarytenoid muscles and present the results of a pharmacological trial in the treatment of a person with adductor laryngeal dystonia. Methods and Materials: Motor evoked potentials (MEPs) and cortical silent period were recorded in the left cricothyroid muscle of nine healthy participants (mean age 38.33 ± 9.43 years). Transcranial magnetic stimulation (TMS) was applied over the projection of the primary motor cortex for the representation of the laryngeal musculature of the left (ipsilateral) and right (contralateral) hemispheres. Participants were engaged in a phonation task (voluntary motor activation of laryngeal muscles), and supramaximal intensity stimulation was applied relative to the resting motor threshold for upper extremities. Analysis of the duration of the cortical silent period was performed following ipsilateral and contralateral TMS stimulation. In the single case study of a patient with adductor laryngeal dystonia, the primary motor cortex representing the laryngeal musculature was mapped to detect the cortical silent period in the cricothyroid and thyroarytenoid muscles. Pharmacotherapy with trihexyphenidyl and clonazepam was introduced. Results: The cortical silent period was successfully induced in the cricothyroid muscle of eight healthy participants by stimulating the contralateral (53.02 ± 4.53 ms) and all subjects by stimulating the ipsilateral (53.76 ± 8.05 ms) laryngeal motor cortex. In the case report of the patient with laryngeal dystonia, no cortical silent period was observed in the cricothyroid and thyroarytenoid muscles following MEP registration. Pharmacological treatment with trihexyphenidyl and clonazepam did not effectively reduce the speech/vocal pathology in the patient with laryngeal dystonia. Conclusion: The preliminary investigation provides information on the duration of the cortical silent period in the cricothyroid muscle in healthy individuals. The research results highlight the need for future studies on the cortical silent period in individuals with laryngeal dystonia. The identification of neurophysiological mechanisms can contribute to the future diagnosis and treatment of individuals with laryngeal dystonia.