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Sun Apr 10 21:52:51 EST 2005

	Indeed, this is the origin of that dubious factoid: "You use only
	20 percent of your brain anyway." This is true, but only in a very
	limited sense. Before the hand starts acting weak or paralyzed, a
	slowly growing tumor has to kill about 80 percent of the cells in
	the hand region of the motor strip. Yet that is a very crude test
	of function. A pianist or mechanic would probably notice problems
	long before then. And a stroke that suddenly killed perhaps 30
	percent of the neurons in the motor strip would also cause

[1] http://faculty.washington.edu/wcalvin/bk7/bk7ch1.htm


Didier A Depireux                              didier at isr.umd.edu
Neural Systems Lab                 http://www.isr.umd.edu/~didier
Institute for Systems Research          Phone: 301-405-6557 (off)
University of Maryland                                -6596 (lab)
College Park MD 20742 USA                     Fax: 1-301-314-9920

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