part of part of gyrus telencephalon regional part of brain middle frontal gyrus rostral middle frontal gyrus rostral middle frontal gyrus rostral part of middle frontal gyrus UBERON:0006446 FMA:70687 anterior part of middle frontal gyrus Component of the middle frontal gyrus The rostral boundary is the first appearance of the superior frontal sulcus whereas the caudal boundary is the middle frontal gyrus. The medial and lateral boundaries are the superior frontal sulcus and the inferior frontal sulcus respectively (Christine Fennema-Notestine). BIRNLEX:1090 frontal gyrus