Tag Archives: neurology

Recent Interesting Science Articles (Dec’07)

Probably the most talked about scientific issue that’s been making the rounds recently is the news is that not only has human evolution not stopped since the advent of modern technology, a previously popular view, but has in fact actually accelerated. As this article in ABC News notes, in a recent paper published in the Proceedings of the National Academy of Sciences in the United States, researchers discovered that by comparing the DNA of humans and chimpanzees since the two species diverged six million years ago there were not enough differences between the two sets of DNA to account for the currently observed rate of change. Therefore, they take this to mean that human evolution has substantially accelerated since the appearance of modern humans 40,000 to 50,000 years ago.

Moreover, they find that different populations of humans have been evolving in different ways. The lighter skin colour of Asians and Europeans compared to Africans is one example, as an adaptation to allow more absorption of vitamin D in areas with less sun. Another example is the disappearance of the lactase enzyme that allows digestion of fresh milk in China and most of Africa where dairy farming is less common than in Europe.

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Philosophy Embraces Empirical Experiments?

A thought-provoking article entitled “The New New Philosophy” published recently in the New York Times Magazine covers a recent trend among philosophers to embrace empirical experiments. As the article notes, philosophers have traditionally tended to be rather snooty towards during actual empirical work, preferring to think of themselves as pure workers of the mind who need nothing but pencil and paper and a comfortable armchair.

Of course, philosophy has tried to be more scientific before, notably postmodernism’s ridiculous efforts to dress up their nonsense in scientism, in order to steal back some of the glory and respect that philosophy has lost since natural philosophy became science. But in my opinion at least, this new acceptance of empiricism is much more likely to yield interesting results. As I alluded to in my review of Irrational Man, philosophers have tended to assume than mere reflection is sufficient to reveal the secrets of the human psyche, while ignoring how discoveries in neurology have allowed us to examine in ever more intimate detail how the brain really works.

The article offers the opinion that while empirical work may raise interesting new questions for philosophers, it would not be able to settle them. I think that this is somewhat over-simplified. At the very least, objective knowledge of the processes that drive emotions, intentions and thought itself would seem render invalid many lines of philosophical inquiry. For example, Ayn Rand believed that reason should precede emotions such that we should use reason to determine how we should feel and then adjust our feelings accordingly, while neurologists now believe that feeling itself is a part of the reasoning process. Similarly many philosophers believe that existential angst is indicative of a great gap in human existence that must be filled either by religion or some other ideal. Perhaps it is only indicative of those philosophers’ lack of access to anti-depression medication.

The Death of Free Will

This month’s issue of Popular Mechanics has an article on the latest advances in mind reading technology: using magnetic resonance imaging machines to determine without ambiguity what a subject is thinking about. As a practical matter, the main experiment cited in the article is actually not that impressive since there was a base success rate of 50 percent simply by guessing what the test subject was thinking about. As a foretaste of what is to come however, it is intriguing. As the imaging resolution goes up and the database from which the raw images are interpreted grows, the accuracy of such devices will only increase. It is well within the realm of the possible that eventually such devices may be available in a portable form.

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Seeing Ghosts

The Nightmare by Henry Fuseli

Since a friend of mine, Tan Kien Boon, recently made a post on his blog about an emotionally trying experience that could be related to ghosts, I thought I might write about my closest encounter with the supernatural. This happened several years ago when I was working for a logging company in Gabon in west central Africa. I was sleeping, alone, face up, late in the afternoon, the kind of sleep where you’re not awake but not completely unconscious either.

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A Book: Descartes’ Error

Contrary to traditional scientific opinion, feelings are just as cognitive as other percepts. They are the result of a most curious physiological arrangement that has turned the brain into the body’s captive audience. Feelings let us catch a glimpse of the organism in full biological swing, a reflection of the mechanism of life itself as they go about their business. Were it not for the possibility of sensing body states that are inherently ordained to be painful or pleasurable, there would be no suffering or bliss, no longing or mercy, no tragedy or glory in the human condition.

-Antonio R. Damasio in Descartes’ Error

Descartes’ Error by Antonio Damasio

Descartes’ error, as meant by neurologist Antonio R. Damasio in this book, and one that has insinuated itself deeply into mainstream thought, is as he puts it: “the abyssal separation between body and mind, between the sizable, dimensioned, mechanically operated, infinitely divisible body stuff, on the one hand, and the unsizable, undimensioned, un-pushpullable, nondivisible mind stuff; the suggestion that reasoning, and moral judgment, and the suffering that comes from physical pain or emotional upheaval might exist separately from the body. Specifically: the separation of the most refined operations of mind from the structure and operation of a biological organism.”

In other words: thinking is inescapably a biological process. It is expressly not true, as many people take for granted, that “thinking, and awareness of thinking, are the real substrates of being.”

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