Insulinogenic index (ΔI/ΔG) in response to glucose loading in control and lipids-infused rats under subdiaphragmatic vagotomy. Values are means ± SEM of six cases for all groups. ***P < 0.001, significantly different from intact rats. C, control rats; Cv, control vagotomized rats; IL, lipids-infused rats; ILv, lipids-infused vagotomized rats.