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. Author manuscript; available in PMC: 2020 Feb 1.
Published in final edited form as: Respir Physiol Neurobiol. 2018 Nov 28;260:37–52. doi: 10.1016/j.resp.2018.11.011

Figure 2:

Figure 2:

Location of the preBötzinger Complex (preBötC), Bötzinger Complex (BötC) and Retrotrapezoid Nucleus (RTN) as identified by injection of fluorescent latex microspheres in eight rabbits. The left panel shows diagrammatic hemisections of the brainstem at each rostro-caudal level with the individual injection sites superimposed in red squares. The right panels show the corresponding hemisections from one animal with immunoreactivity for choline acetyltransferase (ChAT), tyrosine hydroxylase (TH) and Nissl substance. Red microspheres mark the area of injection of the test substances in Protocol 3. NTS: Nucleus of the Solitary Tract; NA: Nucleus Ambiguus; IO: Inferior Olive; py: pyramidal tract; 12N: Nucleus Hypoglossus; 7N: Nucleus facialis; C1: adrenergic C1 group. Bar = 1mm.