Author/Authors :
Howard ، نويسنده , , R.J. and Bullmore، نويسنده , , E. and Brammer، نويسنده , , M. and Williams، نويسنده , , S.C.R. and Mellers، نويسنده , , J. Donald Woodruff، نويسنده , , P. and David، نويسنده , , A. and Andrew، نويسنده , , C. and Allin، نويسنده , , M. and Simmons، نويسنده , , A. and Cox، نويسنده , , T.، نويسنده ,
Abstract :
Cortical activation in visual association areas known to be responsible for the perception of motion was investigated in two volunteers who viewed a projected animated cartoon periodically “run” and “frozen” during collection of echoplanar MR images. Ten axial, contiguous, 5 mm thick, T2-weighted, gradient-echo images (TE 40 ms, TR 3000 ms) depicting BOLD contrast were acquired through the occipital lobe using a GE Signa 1.5 T system with an advanced NMR operating console. Images were analysed by time series regression modelling estimating power in the MR signal at the ON-OFF frequency of motion. Highly significant activation in response to motion perception was identified in both subjects bilaterally in area V5.
Keywords :
EPI , motion perception , Visual Cortex , V5
