From: Cyto-, myelo- and chemoarchitecture of the prefrontal cortex of the Cebus monkey
 | Nissl | WFA | SMI-32 | Myelin |
---|---|---|---|---|
12o | Granular. Layer IV narrower than in 12l. Well stained cells in IIIc. SG layers more prominent than IG. | Intensely stained. Similar to 12l but band in III-IV not discernible. | Intensely stained. Clear bilamination. Many cells in SG and IG bands, with greatest number in III. | Well myelinated. Similar but less intense than 12l. |
11l | Granular. Limit between II and IIIa is less evident than in 11m, and layer IV is somewhat narrow. Well stained medium-sized cells in Va. | Moderately stained. Band with moderate neuropil and deeply stained PNs in V reaching layer VI and white matter. In IV small PNs. Very pale PNs in III. | Moderately stained. Clear-cut boundaries with area 12o. Moderate labeling of neuropil and dendritic fragments in SG and IG bands. Small densely stained cell bodies in III and some in IV. | Sparse myelination. OBb and IG layers less stained than 12o |
11m | Granular. Thin and sparse layer II. Medium-sized cells with intense pigmentation in IIIc. Densely packed neurons in Va. No clear limits between V and VI. | Lightly stained. Compact and dense band in VI, with moderately stained neuropil and dense PNs. | Discernible bilamination. SG band more stained than in 11l, with cells and processes in III. IG band has moderate staining of neuropil and fragments, but no somas. | Sparse myelination. OBb is faintly stained. Fascicles of vertical fibers in IG layers. |
13i | Granular - dysgranular rostrocaudal transition. Layers Vb and VI have moderately stained small-sized neurons. | Moderately stained, increasing caudally. SG band weakly stained, with sparse neuropil and pale PNs. Well stained band in V, reaching VI and white matter. | Moderately stained, decreasing caudally. Bilaminar pattern. IG band with neuropil and fragments. Moderate immunoreactivity in SG band with very few somas and processes in III. | Light to moderate myelination, although stronger than in 13l and 13m. Evident OBb. Fine plexus in SG layers. Moderate staining in IG layers. |
13l | Similar to 13i but cells somewhat bigger in Va. | Slightly stained, increasing caudally. No visible superficial band. Narrow band in layer VI. | Moderately stained. IG band similar to 13i. Much lower level of staining in SG layers. No visible bilaminar pattern. | Staining is lighter and more diffuse than in 13i. |
13m | Granular - dysgranular rostrocaudal transition. Well developed layer IIIb with sparsely packed small-sized neurons. Cells more stained in IIIc and Va. Vb blends with layer VI. | Poorly stained, increasing caudally. | Similar to 13l. | Similar to 13l but with short vertical fibers in IG layers. |
14r | In IIIc and Va cells are larger and more stained than in IIIa-b. No clear limit between Vb and VI. | Poorly stained. No clear-cut limits with areas 11 and 10. Narrow band over layer VI, with pale nets and moderately stained neuropil. | Faintly stained band in IG layers, with neuropil and fragments, and a few somas. | Poorly myelinated. No obvious horizontal bands. Some short and thin vertical fibers in IG layers. |
14c | Similar to 14r, but with very faint layers II and IV. Radial striations in IG layers. | Poorly stained. Thin vertical fibers in deep layers. | Similar to 14r, but lighter. | Poorly myelinated. |