Rhinal sulcus

In the human brain, the entorhinal cortex appears as a longitudinal elevation anterior to the parahippocampal gyrus, with a corresponding internal furrow, the external rhinal sulcus. The rhinal sulcus separates the parahippocampal uncus from the rest of the temporal lobe in the neocortex. The rhinal sulcus and the hippocampal sulcus were both present in early mammals.

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