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| | HIT |
 | | A key foundation for Brodmann's demarcation of areas was his demonstration that cortex generally consists of six layers, for which he reported comparative studies involving fifty-five species. |
 | | He distinguished areas on the basis of the relative thickness of these layers (e.g., layer 4 was very thick in areas 1, 2, and 3, but much thinner in area 4) and the particular types of neurons found (e.g., pyramidal cells). |
 | | In identifying brain areas, Brodmann worked comparatively; besides his well-known map of the human cortex (figure 1), he generated maps for the lemur, flying fox, rabbit, and others. |
| mechanism.ucsd.edu /~bill/research/HIT.htm (3845 words) |
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