Figure 2.
Top: Photographs of the left (L) and right (R) lateral surfaces of Einstein’s brain taken with the front of the brain rotated toward the viewer, with original labels. Bottom: Our identifications. Numbers 1–4 indicate four gyri in Einstein’s right frontal lobe, rather than three as is typical; K = ‘knob’ representing motor cortex for left hand. Submerged gyri are shaded red near the diagonal sulcus on each side. It is clear from the left hemisphere that the posterior ascending limb of the Sylvian fissure and the postcentral inferior sulcus are not confluent, contrary to the literature. Sulci: a = additional inferior frontal; a1 = ascending branch of the superior temporal sulcus; a2 = angular; aS = posterior ascending limb of the Sylvian; c = central; d = diagonal; dt = descending terminal branch of the Sylvian; fi = inferior frontal; fm = midfrontal; fs = superior frontal; ht = posterior terminal horizontal branch of the Sylvian; ip = intraparietal; mf = medial frontal; pci = precentral inferior; pcs = precentral superior; pma = marginal precentral; pti = postcentral inferior; pts = postcentral superior; R = ascending ramus of anterior Sylvian fissure; R’ = horizontal ramus of anterior Sylvian fissure; S = Sylvian fissure; sa = sulcus acousticus; sca = subcentral anterior; scp = subcentral posterior; sip = intermedius primus of Jensen; ti = inferior temporal; tri = triangular; ts = superior temporal; tt = transverse temporal; u = unnamed; W = fronto-marginal of Wernicke. 1 = superior frontal gyrus; 2 = atypical superior middle frontal gyrus; 3 = atypical inferior middle frontal gyrus; 4 = inferior frontal gyrus (usually the ‘inferior third frontal gyrus’). The figure reproduced with permission from the National Museum of Health and Medicine.