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. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: Brain Res Rev. 2009 Dec 11;62(2):212. doi: 10.1016/j.brainresrev.2009.12.002

Figure 1.

Figure 1

A, Lateral view of the rhesus monkey brain shows the extent of area 46 (small dotted line). Large dashed line is a diagrammatic representation of the upper and lower banks of the principal sulcus. Area 46 is divided into a rostral and a caudal sector (vertical dotted line). The thick vertical line shows the level at which the section shown in B was taken. B. Nissl stained coronal section through the frontal lobe at the level of the rostral end of the corpus callosum (cc). The principal sulcus (ps), which is on the lateral surface of the cortex, contains area 46 that extends over the upper and lower lips of the sulcus. C. Nissl stained section of area 46 in the lower bank of the principal sulcus shows the appearance of the six cellular layers and the underlying white matter (WM).