Figure 4.

Phenotype of the post-inspiratory and inspiratory laryngeal motoneurones

A, biocytin-labelled post-inspiratory (right side) and inspiratory (left side) laryngeal motoneurones and their representative tracings. B, choline acetyltransferase immunohistochemical staining of the AmbL. C, merge of (A) and (B). Note that these laryngeal motoneurones are positive choline acetyltransferase-immunoreactive cells (↑). D, representative tracings of two superimposed sweeps of antidromic action potentials in one inspiratory laryngeal motoneurone evoked by stimulation (*) of the recurrent laryngeal nerve. E, sequence of a set of transversal sections corresponding to the levels of caudal part of nucleus ambiguus. Every recorded motoneurone is represented by a colour spot on the same side for better illustration. Numbers on the transversal sections indicate the distance in millimetres to the obex (0). AmbL, loose formation of caudal nucleus ambiguus; RAmb, retroambiguus nucleus.