Penfield wrote, “Consciousness continues, regardless of what area of cerebral cortex is removed. On the other hand consciousness is inevitably lost w… - Michael S. Gazzaniga

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Penfield wrote, “Consciousness continues, regardless of what area of cerebral cortex is removed. On the other hand consciousness is inevitably lost when the function of the higher brain stem (diencephalon*) is interrupted by injury, pressure, disease, or local epileptic discharge.” Yet he is quick to qualify that “to suggest that such a block of brain exists where consciousness is located, would be to call back Descartes and to offer him a substitute for the pineal gland as a seat for the soul.”6

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About Michael S. Gazzaniga

Michael S. Gazzaniga (born December 12, 1939) is an American neuroscientist, author and professor of psychology at the University of California, Santa Barbara, where he heads the new SAGE Center for the Study of the Mind.

Biography information from Wikiquote

Also Known As

Native Name: Michael Steven Gazzaniga
Alternative Names: Gazzaniga, M.S. M. S. Gazzaniga Michael S Gazzaniga Gazzaniga, Michael S.
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Additional quotes by Michael S. Gazzaniga

As evolutionary neurobiologists Leah Krubitzer and Jon Kaas put it, Although the phenotype generated is context-dependent, the ability to respond to the context has a genetic basis. . . . In essence, the Baldwin effect is the evolution of the ability to respond optimally to a particular environment. Thus, genes for plasticity evolve, rather than genes for a particular phenotypic characteristic, although selection acts upon the phenotype.

when we consider DNA, the genotype is the DNA sequence that contains instructions for the living organism. The phenotype is the observable characteristics of an organism, such as its anatomy, biochemistry, physiology, and behavior. The genotype interacts with the environment to produce the phenotype. To put this in an everyday situation, consider the blueprint as a house’s genotype and the actual house its phenotype. The phenotypic construction process is the building of the house using the blueprint as information about what and how to do it. The phenotype is related to the genotype that describes it, but there is a world of physical difference between the genotype and the phenotype and even the phenotypic construction process. For one, the genotype is non-dynamic; it is a quiescent, one-dimensional sequence of symbols (DNA’s symbols are nucleotides) that has no energy or time constraints. Like a blueprint, it can sit around for years, as you have probably learned from watching CSI. The genotype dictates what should be constructed (perhaps a really cute dog), but the DNA itself does not look or act anything like a cute dog. On the other hand, the phenotype (the cute dog) is dynamic and uses energy, especially if it is a border collie.

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