Electromyographic (EMG) studies of the laryngeal muscles were thought to be difficult because of the small size and deep location of these muscles. However, EMG methods to study the cricothyroid and the thyroarytenoid muscles had been established. The EMG techniques used to study these muscles were described in this paper.
EMG study of the posterior cricoarytenoid muscle (PCA) was limited, and different PCA recording techniques had been proposed. The approach to evaluate this muscle had been developed along three main lines: oral, percutaneous and nasal. Electrode placement techniques for study of the PCA were reviewed.
