(A) A part of the Cox curve in one of the recordings, with a spread from −0.84 to 0.96. (B) Data representing the blue dot with most positive Cox index. (C) Data representing the red dot with most negative COx index, depending on the independent relation between rSO₂ and the systemic MAP. Shaded area represents negative Cox index. Unshaded area represents positive COx index. Lines show corresponding linear regression line.