Fig. 3From: A randomized trial of the effects of the noble gases helium and argon on neuroprotection in a rodent cardiac arrest modelExamples of Cresyl Violet staining of the hippocampus CA1 segment. Overview of the hippocampus (a and b) and close-up view of the CA1 region (c) and (d) of a sham animal without cardiac arrest (a and c) and of an animal with cardiac arrest and argon treatment (b and d). Arrowheads show pyknotic cells, indicating apoptosis in the animal which suffered from cardiac arrestBack to article page