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Figure 2


Fig. 2. The effects of midbrain transection on fictive (A) breathing frequency, (B) episodes per minute and (C) breaths per episode recorded in vitro from control (open symbols) and chronically hypercapnic (CHC; closed symbols) brainstem–spinal cord preparations. Circles and squares represent values recorded prior to and following midbrain transection, respectively. *Significant difference from the value at pH 8.0 within any given group; {dagger}significant difference between the control and CHC groups; {ddagger}significant difference before and after transection in either group.





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