Superior frontal gyrus

The superior frontal gyrus is situated above the superior frontal sulcus and is continued on to the medial surface of the hemisphere.

The portion on the lateral surface of the hemisphere is usually more or less completely subdivided into an upper and a lower part by an antero-posterior sulcus, the paramedial sulcus, which, however, is frequently interrupted by bridging gyri.

The portion on the medial surface the hemisphere may be subdivided into lower part by an antero-posterior sulcus, the superior rostral sulcus (SRS). These portions are not officialy listed in Terminologia Anatomica or in TNA, but are described* as:

• The superior medial segment of the superior frontal gyrus (smSFG) is the gyrus between the cingulate gyrus (CG) or the paracingulate gyrus (PCS) and the superior rostral sulcus (SRS).

• The inferior medial segment of the superior frontal gyrus (imSFG) is the gyrus between the superior rostral sulcus (SRS) and the inferior rostral gyrus (IRS), immediately above the gyrus rectus. This portion is sometimes termed as "rostral gyrus"