The study of laryngeal electromyography represents a particular electrophysiological technique. Its use is limited to pathologies of the peripheral nervous system involving lower cranial nerves, pathologies of the motor neuron and, above all, movement disorders of the vocal cords, such as primitive and secondary spasmodic dysphonia or spastic dysarthria.
The electromyographic techniques applied to record laryngeal muscles are also used to correctly perform the inoculation of botulinum toxin into vocal cord muscles for the treatment of spasmodic dysphonia. Therefore, theoretical and technical aspects regarding the EMG of the vocal cord muscles and in the different peripheral neuropathies and in motor neuron pathologies will be addressed. The behaviors of the muscles of the vocal cords will be analyzed in spasmodic dysphonia, vocal tremors and in particular forms of stridor.
Finally, the aspects that regulate the aberrant reinnervation phenomena of the muscles of the vocal cords, defined through the EMG recording techniques, will be addressed.
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