|
KMID : 0361019960390050825
|
|
Korean Journal of Otolaryngology - Head and Neck Surgery
1996 Volume.39 No. 5 p.825 ~ p.830
|
|
|
The Double Innervation of the Thyroarytenoid Muscle and It's Central Projection in Dog
|
|
|
|
|
Abstract
|
|
|
Recent studies have detailed the existence of a cross-innervating branch of the external superior laryngeal nerve(ExSLN) to the thyroarytenoid muscle(TA). To verify and determine the nature of this additional innervation, a retrograde transport
technique with horseradish peroxidase(HRP) was used. Injection of HRP to the TA, after having removed 1cm of the reccurent laryngeal nerve(RLN) innervating this muscle, resulted in retrograde labeling of the motor neurons in the nucleus
ambiguus(NA) in
2 out of 6 canines. HRP labeled neurons were distributed rostrocaudally from 1.5 mm rostral to the obex with about 2.5 mm of caudal extension. This segment corresponded to the area of TA motor neurons from the RLN. We conclude that the TA can
receive a
second motor innervation from a branch of the ExSLN in some cases. This additional neural motor innervation of the TA only has a basic interest but also may contribute to understanding phonation, as well as, clinical issues in some neurological
laryngeal diseases. 9Korean J Otolaryngol 39 : 5, 1996)
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
  
|