The term area 11l (macaque) refers to a portion of the orbital gyri that is defined on the basis of internal structure in the macaque. It is one of two components of area 11 (macaque) in the orbitomedial prefrontal cortex. The other component is area 11m (macaque). Features that distinguish it from some adjacent areas are its granularity and a bilaminate internal pyramidal layer (V) with aggregates of pyramidal cells revealed by Nissl stain and vertical fiber bundles in the external granular layer (II), the internal granular layer (IV), and the internal pyramidal layer (V) as revealed by myelin stain ( Carmichael-1994 ). Its human equivalent is area 11l ( Ongur-2003 ). As granular prefrontal cortex, it has no equivalent in the rat ( Wallis-2012 ).