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Comparison of evoked electromyography of the larynx to electrical and magnetic stimulation of the motor cortex of the dog
Author(s) -
Haghighi Siavash S.,
Estrem Scott A.
Publication year - 1991
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1288/00005537-199101000-00012
Subject(s) - stimulation , transcranial magnetic stimulation , neuroscience , motor cortex , electromyography , medicine , compound muscle action potential , electrophysiology , vagus nerve , anatomy , evoked potential , psychology
The electromyographic and contractile properties of the laryngeal muscles upon stimulation of the laryngeal nerve have been described before. In the present investigation, we used electrical and magnetic stimulation to activate the vocalis muscle in dogs. Stimulation of the vagus nerve at the brain stem exit point resulted in evoked vocalis compound muscle action potential identical in onset latency and configuration to that obtained by the transcranial single‐shock magnetic stimulation at high intensity (>80%). Electrical stimulation of the laryngeal representation of the somatomotor cortex resulted in a contra‐lateral evoked vocalis compound muscle action potential. Central delay time for the 10th cranial nerve was calculated by subtracting the latency of the vocalis recorded by stimulation of the vagus nerve as it exited the brain stem from the latency obtained by direct cortical stimulation.