MULTIPLE SCALES OF BRAIN-MIND INTERACTIONS Lester Ingber Lester Ingber Research P.O. Box 857 McLean, VA 22101 ingber@alumni.caltech.edu ABSTRACT: Posner and Raichle’s Images of Mind is an excellent educational book and very well written. Some flaws as a scientific publication are: (a) the accuracy of the linear subtraction method used in PET is subject to scrutiny by further research at finer spatial- temporal resolutions; (b) lack of accuracy of the experimental paradigm used for EEG complementary studies. KEYWORDS: PET; EEG; nonlinear; VALUE OF THE TEXT Images (Posner & Raichle, 1994) is an excellent introduction to interdisciplinary research in cognitive and imaging science. Well written and illustrated, it presents concepts in a manner well suited both to the layman/undergraduate and to the technical nonexpert/graduate student and postdoctoral researcher. Many, not all, people involved in interdisciplinary neuroscience research agree with the P & R’s statements on page 33, on the importance of recognizing emergent properties of brain function from assemblies of neurons. It is clear from the sparse references that this book was not intended as a standalone review of a broad field. There are some flaws in the scientific development, but this must be expected in such a pioneering venture. P & R have proposed many cognitive mechanisms deserving further study with imaging tools yet to be developed which can yield better spatial-temporal resolutions.