A Critique of a New Analysis Proposed for Functional Neuroimaging

Methods for analysing functional imaging data have evolved rapidly over the last ten years. Standardized techniques based on formal mathematical and statistical theory and rigorous empirical validation have been proposed to facilitate comparisons of biological results between laboratories. This paper examines an image analysis technique that appears to identify unexpectedly large numbers of activated brain areas for the data collected. It concludes that the method may not adequately control for false positives, rendering interpretation of the functional anatomy difficult.

[1]  Karl J. Friston,et al.  The colour centre in the cerebral cortex of man , 1989, Nature.

[2]  Karl J. Friston,et al.  Comparing Functional (PET) Images: The Assessment of Significant Change , 1991, Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism.

[3]  Karl J. Friston,et al.  A direct demonstration of functional specialization in human visual cortex , 1991, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[4]  M. Corbetta,et al.  Selective and divided attention during visual discriminations of shape, color, and speed: functional anatomy by positron emission tomography , 1991, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[5]  Alan C. Evans,et al.  A Three-Dimensional Statistical Analysis for CBF Activation Studies in Human Brain , 1992, Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism.

[6]  Richard S. J. Frackowiak,et al.  Area V5 of the human brain: evidence from a combined study using positron emission tomography and magnetic resonance imaging. , 1993, Cerebral cortex.

[7]  J B Poline,et al.  Analysis of Individual Positron Emission Tomography Activation Maps by Detection of High Signal-to-Noise-Ratio Pixel Clusters , 1993, Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism.

[8]  P. Roland,et al.  Three‐dimensional analysis of clustered voxels in 15O‐butanol brain activation images , 1993 .

[9]  Karl J. Friston,et al.  Assessing the significance of focal activations using their spatial extent , 1994, Human brain mapping.

[10]  Leslie G. Ungerleider,et al.  The functional organization of human extrastriate cortex: a PET-rCBF study of selective attention to faces and locations , 1994, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[11]  P E Roland,et al.  Visual form discrimination from color or motion cues: functional anatomy by positron emission tomography. , 1994, Proceedings of the National Academy of Sciences of the United States of America.

[12]  P E Roland,et al.  Processing and Analysis of Form, Colour and Binocular Disparity in the Human Brain: Functional Anatomy by Positron Emission Tomography , 1994, The European journal of neuroscience.