The term area a47r refers to a small oblong area at the anterolateral margin of orbital prefrontal cortex. Located in the lateral orbital gyrus, it borders area 47m caudally and area 11l and area a10p medially. Its lateral border on the margin of the gyrus is formed by area 47l caudally and area p47r rostrally. Defined in the human by multiple criteria, it is fMRI-activated in LANGUAGE STORY-MATH, THEORY OF MIND-RANDOM, FACES-SHAPES, GAMBLING and RELATIONAL-MATCH contrast tasks. It is deactivated in LANGUAGE STORY, STORY-MATH and MOTOR CUE contrast tasks. Unlike most cortical areas, its activation/deactivation patterns with many tasks is different in the left and right hemispheres. Other authors have referred to a heavily overlapping area as 47r ( Glasser-2016 ). In the macaque, area 47r is not subdivided into anterior and posterior parts, and it is commonly referred to as area12r ( Ongur-2003 ) or as area 47/12r ( Petrides-2012 ).. As granular prefrontal cortex, It has no architectonic equivalent in the the rat ( Wallis-2012 ).