part of part of gyrus middle frontal gyrus caudal middle frontal gyrus UBERON:0006445 BIRNLEX:1083 FMA:70688 caudal part of middle frontal gyrus Component of the middle frontal gyrus. The rostral boundary of the middle frontal gyrus was the rostral extent of the middle frontal gyrus whereas the caudal boundary was the precentral gyrus. The medial and lateral boundaries were designated as the superior frontal sulcus and the inferior frontal sulcus respectively (Christine Fennema-Notestine). posterior part of middle frontal gyrus caudal middle frontal gyrus rostral middle frontal gyrus frontal gyrus