Definition: a long convolution on the medial surface of the temporal lobe, forming the lower part of the fornicate gyrus, extending from behind the splenium corporis callosi forward along the dentate gyrus of the hippocampus from which it is demarcated by the hippocampal fissure. The anterior extreme of the gyrus curves back on itself, forming the uncus, the major location of the olfactory cortex.
See Also: entorhinal area
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Examples: glitazone, GI cocktail, etc.