Rhinal sulcus

Rhinal sulcus is an anterior extension of the collateral sulcus located on the inferior surface of the temporal lobe. It divides the front part of the parahippocampal gyrus (called the uncus) from the medial occipitotemporal gyrus on the outside.

It's important not to get confused with the different terms used in the literature. For example, the occipitotemporal gyrus is sometimes referred to as the fusiform gyrus. Similarly, the occipitotemporal sulcus is sometimes called the mid-fusiform sulcus, which divides the fusiform gyrus into medial and lateral parts. Consequently, the medial and lateral fusiform gyrus parts are alternative names for the medial and lateral occipitotemporal gyri. In other words, we can also say that the collateral and rhinal sulci separate the front part of the parahippocampal gyrus from the medial fusiform gyrus.