EABR AGFs for four mice (top panel, a) and guinea pigs of varying cochlear health (middle panel, b) for the primary electrode on the final day tested. AGF slopes have been plotted as a function of average SGN density for histology Profiles A through C (bottom panel, c) to show how these four mice have similar slopes to guinea pigs of comparable cochlear health. Slopes for each mouse represent one growth function obtained on the last day usable data was collected and slopes for each guinea pig represent the average slope of multiple growth functions obtained during a period when slopes were relatively stable over time (150 DPI to euthanasia). Individual symbols are specified for each mouse and circles for guinea pigs. Colors were coded by IHC survival in Profiles A through C; red = high, yellow = medium to low, and black = no IHC survival.