The fusiform gyrus was identified as follows:

the medial margin was defined by the collateral and rhinal sulci, i.e., the boundary of the parahippocampal gyrus, and

the lateral boundary was taken as the sulcus medial to the inferior temporal gyrus.

The anterior extremity of the fusiform gyrus approached the temporal pole.

The posterior boundary, as defined for the purpose of this study, was the most posterior temporal lobe slice in which the hippocampus was visible.