This elegant book presents current evidence on the organization of the
mammalian cerebral cortex. The focus on synapses and their function
provides the basis for understanding how this critical part of the brain
could work. Dr. White and his colleague Dr. Keller have collated an
impressive mass of material. This makes the crucial information
accessible and coherent. Dr. White pioneered an area of investigation
that to most others, and occasionally to himself, seemed a bottomless
pit of painstaking at- tention to detail for the identification and
enumeration of cortical syn- apses. I do not recall that he or anyone
else suspected, when he began to publish his now classic papers, that
the work would be central to an accelerating convergence of information
and ideas from neurobiology and computer science, especially artificial
intelligence (AI) (Rumelhart and McClelland, 1986). The brain is the
principal organ responsible for the adaptive capacities of animals. What
has impressed students of biology, of medicine, and, to an extent, of
philosophy is the correlation between the prominence of the cerebral
cortex and the adaptive "complexity" of a particular spe- cies. Most
agree that the cortex is what sets Homo sapiens apart from other species
quantitatively and qualitatively (Rakic, 1988). This is summarized in
the first chapter.