Convergence of afferents from the SLN and GPN in cat medullary swallowing neurons

We demonstrated the convergence of information from the pharyngeal and laryngeal mucosa, transmitted by the glossopharyngeal nerve and superior laryngeal nerve, in the nucleus of the tractus solitarius

Shinji Ootani

2002

Scholarcy highlights

  • We demonstrated the convergence of information from the pharyngeal and laryngeal mucosa, transmitted by the glossopharyngeal nerve and superior laryngeal nerve, in the nucleus of the tractus solitarius
  • The distribution of terminals of the GPN and SLN in the NTS was examined by an HPR tracing technique in cats, and the synapse formation of these neurons with NTS neurons was demonstrated by electron microscopy
  • The HRP-labeled SLN and GPN terminals were localized in a small area of the interstitial subnucleus of the NTS, slightly rostral to the obex, forming synapses with NTS neurons
  • Convergence of peripheral sensory inputs from the SLN and GPN was observed in more than 80% of the NTS cells
  • These results suggest that the NTS is a sensory-relay nucleus and integrates information necessary for eliciting protective reflexes of the upper airway, such as swallowing

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