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. Author manuscript; available in PMC: 2010 Sep 30.
Published in final edited form as: Respir Physiol Neurobiol. 2009 Jul 18;168(3):272–280. doi: 10.1016/j.resp.2009.07.012

Figure 6.

Figure 6

A: The percentage of SC neurons from control adult rats that were activated by hypercapnic acidosis in the absence (7 neurons from 4 rats) (white bar) and presence of synaptic blockage medium (SNB—11.4 mM Mg2+ and 0.2 mM Ca2+) (8 neurons from 6 rats) (gray bar) and SC neurons from adult rats adapted to CHx that were activated by hypercapnic acidosis in the absence (6 neurons from 6 rats) (black bar) and the presence (gray bar) of SNB (6 neurons from 6 rats). The N values are denoted on each bar (14 neurons from 6 control rats and 20 neurons from 9 CHx rats). B: The percentage of SC neurons from control adult rats that were inhibited by hypercapnic acidosis in the absence (2 neurons from 2 rats) (white bar) and presence (2 neurons from 2 rats) of SNB (gray bar) and of SC neurons from adult rats adapted to CHx that were inhibited by hypercapnic acidosis in the absence (5 neurons from 4 rats) (black bar) and the presence (6 neurons from 3 rats) (gray bar) of SNB. The N values are denoted on each bar. The remaining, non-chemosensitive, neurons amounted to 5 neurons from 4 control rats and 7 neurons from 5 CHx rats. Notice that SNB does not affect the percentage of neurons that respond within control or CHx animals. C: The chemosensitivity index of SC neurons from control adult rats that were activated by hypercapnic acidosis in the absence (white bar) and presence (gray bar) of SNB and of SC neurons from adult rats adapted to CHx that were activated by hypercapnic acidosis in the absence (black bar) and presence (gray bar) of SNB. D: The chemosensitivity index of SC neurons from control adult rats that were inhibited by hypercapnic acidosis in the absence (white bar) and presence (gray bar) of SNB and of SC neurons from adult rats adapted to CHx that were inhibited by hypercapnic acidosis in the absence (black bar) and presence (gray bar) of SNB. The height of each bar represents the mean chemosensitivity index for that group and the error bars represent 1 SEM. There are no error bars for the CI of inhibited neurons from control animals in the absence and presence of SNB because the two inhibited neurons in the absence and presence of SNB had the same CI. Notice that CHx does not affect the chemosensitivity index of SC neurons activated or inhibited by hypercapnic acidosis.