Physiological Imaging of the Brain with PET
Establishing behavioural correlates of functional imaging signals
Gjedde A., Hansen S.B., Knusden G.M. & Paulson O.B.
San Diego, CA
Functional imaging studies have sought to establish brain-behavior relationships in a variety of ways, many of which involve some form of image decomposition. The present study took a different approach, namely, decomposing the behavior rather than the image. A speech task produced during scanning was acoustically analyzed to produce a number of performance measures and multiple linear regression was used to examine the ability of image data to predict these performance measures. The results identified areas known to be important in speech production and further suggested that activity in multiple brain areas is needed to predict behavior in this task. This approach requires neither active nor passive control states, and avoids some of the difficulties associated with image decomposition.
Sidtis J.J., Anderson J.R., Strother S.C. & Rottenberg D.A.