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Graph of correlations between changes in inspiratory (Ti) and cough inspiratory (CTi) durations after microinjections of d,l-homocysteic acid (DLH; n = 8), kynurenic acid (KYN; n = 6), and gabazine (GAB; n = 5) in the pre-Bötzinger complex area. Changes are more pronounced for breathing after KYN and for coughing after GAB delivery. Shaded areas encompassed by dashed lines represent 95% confidence intervals.
