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. Author manuscript; available in PMC: 2012 Apr 14.
Published in final edited form as: Neuroscience. 2011 Jan 26;179:120–130. doi: 10.1016/j.neuroscience.2011.01.044

Figure 3.

Figure 3

Schematic summary of cholinergic collateral projections from PMT cells to the ipsilateral and contralateral MG. Three cases were used for quantitative analysis of this projection pattern. The numbers express the range of percentages of cells with collateral projections compared with the cells that project to only one of the two nuclei. In other words, the bilaterally-projecting cells (those that contained both retrograde tracers) constituted up to 9% of the cells that projected to the ipsilateral MG (indicated by the associated oval, and representing cells that contained only the ipsilateral tracer + cells that contained both tracers). The same population of bilaterally-projecting cells constituted up to 42% of the cells that projected to the contralateral MG. Line thickness of arrows in this and subsequent drawings reflects the relative size of the projection (measured as the number of cells found in each projection). Note that this (and subsequent) schematics illustrate the immunopositive [i.e., cholinergic) cells; immunonegative cells were also labeled but are not included in the schematic summaries.