Research Article| Volume 3, ISSUE 4, P314-320, December 1989

Laryngeal sensory innervation: Origins of sensory nerve fibers in the nodose ganglion of the cat

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      Following horseradish peroxidase (HRP) application into each of the superior laryngeal nerve (SLN), internal branch (Int) and external branch (Ext) of the SLN, the inferior laryngeal nerve (ILN), and the anterior branch (Ant) of the ILN, all labeled sensory neurons were found in the nodose ganglion (NG) of cats ipsilaterally. Labeled neurons of the SLN were seen in the rostral part of the NG. Within the rostral part of the ganglion, sensory neurons of the Int-SLN were aggregated and occupied the most rostral part while those of the Ext-SLN were scattered and in the middle part. Cell bodies of the ILN were slightly compact and located in the rostral part of the NG, extending to the middle part. Within the rostral and middle part of the NG, labeled neurons of the Ant-ILN were sparse and occupied in the middle part. Laryngeal sensory cell bodies were unipolar neurons of medium size. The mean number of labeled neurons of the SLN was 336 whereas that of the ILN was 124.
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