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December 1974

Rehabilitation of Vocal Cord Paralysis: Studies Using the Vagus Recurrent Bypass Anastomosis, Type Ramus Posterior Shunt

Author Affiliations

From the Department of Otorhinolaryngology, Goettingen University, Germany.

Arch Otolaryngol. 1974;100(6):431-441. doi:10.1001/archotol.1974.00780040445005

An anastomosis between the recurrent part of the right vagus nerve and the dorsal ramus of the interior laryngeal nerve was performed in dogs. After allowing 12 months for nerve regeneration, it was shown that isolated reinnervation of the cricoarytenoid muscle had occurred. The following results were shown by this work:

  1. Normal action potentials of those muscles experimentally reinnervated, and denervation potentials in the remaining laryngeal musculature.

  2. Physiologic synchrony on abduction of both vocal cords.

  3. Histochemical evidence for almost normal acetylcholinesterase activity in the reinnervated musculature, and diminished enzyme levels in the denervated endolaryngeal muscles.

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