Figure 2: Percentage of neurons positive for (a) HSP70 and (b) c-Fos in the hippocampus (CA4) of the four Groups of patients. Group 1 (n=13), sudden death while bathing with apparent macroscopic observations denoting drowning; Group 2 (n=7), sudden death while bathing with no apparent macroscopic observations supporting evidence of drowning; Group 3 (n=11), drowning outdoors (e.g. ocean, pond, etc.); Group 4 (n=10), acute death from by ischemic heart disease.