Sage Journals: Discover world-class research

Abstract

Laryngeal adductory pressure (LAP) is the pressure induced as the vocal folds squeeze on a balloon while the recurrent laryngeal nerve (RLN) is stimulated. The LAP has been shown to vary with the frequency of stimulation, with a characteristic slope. The RLN was divided and reanastomosed 4 different ways in 12 canine hemilaryngeal preparations; the 4 subgroups represented a range of expected post-reinnervation synkinesis recovery patterns. The LAP frequency-response curve was measured before surgery and at monthly intervals for 6 months after surgery. In the “best-case” group (RLN adductor and abductor trunks each divided and reanastomosed), the slope was found to return to normal. The 2 whole RLN division-reanastomosis groups (precise realignment or 180° rotation) both gave results similar to those of the “worst-case” group (RLN adductor and abductor trunks divided and transposed); these 3 subgroups were all significantly different from baseline. The slope of the LAP frequency-response curve may be a useful means of indirectly quantifying laryngeal synkinesis.

Keywords

dog laryngeal synkinesis recurrent laryngeal nerve

Get full access to this article

View all access options for this article.

References

Crumley

. Laryngeal synkinesis: its significance to the laryngologist. Ann Otol Rhinol Laryngol 1989;98: 87–92.

Benninger

Crumley

Ford

. Evaluation and treatment of the unilateral paralyzed vocal fold. Otolaryngol Head Neck Surg 1994;111: 497–508.

Green

Berke

Graves

Natividad

. Physiologic motion after vocal cord reinnervation: a preliminary study. Laryngoscope 1992;102: 14–22.

Crumley

. Unilateral recurrent laryngeal nerve paralysis. J Voice 1994;8: 79–83.

Flint

Downs

Coltrera

. Laryngeal synkinesis following reinnervation in the rat. Neuroanatomic and physiologic study using retrograde fluorescent tracers and electromyography. Ann Otol Rhinol Laryngol 1991;100: 797–806.

Nahm

Shin

Watanabe

Maeyama

. Misdirected regeneration of injured recurrent nerve in the cat. Am J Otolaryngol 1993;14: 43–8.

Nahm

Shin

Chiba

. Regeneration of the recurrent nerve in the guinea pig: reorganization of motorneurons after freezing injury. Am J Otolaryngol 1990;11: 90–8.

Gacek

Malmgren

Lyon

. Localization of adductor and abductor motor nerve fibers to the larynx. Ann Otol Rhinol Laryngol 1977;86: 770–6.

Baldissera

Tredici

Marini

. Innervation of the paralyzed laryngeal muscles by phrenic motoneurons. A quantitative study by light and electron microscopy. Laryngoscope 1992;102: 907–16.

10.

Sato

Hisa

. Contraction properties and histochemical study of cross-innervated intrinsic laryngeal muscles. In: Hirano

Kirchner

Bless

, eds. Neurolaryngology: recent advances. San Diego, Calif: Singular Publishing, 1987: 120–9.

11.

Rice

Cooper

. Contractile properties of canine thyroarytenoid muscle reinnervated from the ansa cervicalis. Ann Otol Rhinol Laryngol 1989;98: 153–6.

12.

Paniello

Lee

West

. Laryngeal reinnervation with the hypoglossal nerve. Laryngoscope (in press).

13.

Dahm

Paniello

. Tracheostomy for long-term laryngeal experimentation. Otolaryngol Head Neck Surg 1998;118: 376–80.

14.

Rosenfield

Miller

Sessions

Patten

. Morphologic and histochemical characteristics of laryngeal muscle. Arch Otolaryngol 1982;108: 662–6.

15.

Happak

Zrunek

Pechmann

Streinzer

. Comparative histochemistry of human and sheep laryngeal muscles. Acta Otolaryngol (Stockh) 1989;197: 283–8.

16.

Brondbo

Hall

Dahl

Teig

Gujord

. A histochemical evaluation of experimentally reinnervated canine laryngeal muscles. J Otolaryngol 1986;15: 265–72.

17.

Buller

Eccles

. Interaction between motoneurons and muscles in respect of the characteristic speed of their responses. J Physiol 1960;150: 417–39.

Laryngeal Adductory Pressure as a Measure of Post-Reinnervation Synkinesis

Abstract

Keywords

Get full access to this article

References