Regional-Dependent Response Functions in Motor Areas Estimated from Multiple Clinical fMRI Measurements

Uwe Klose¹, Marion Batra¹, Benjamin Bender¹, Thomas Ngele¹

93 clinical fMRI experiments with a simple motor task were used to evaluate the average signal time course in the left and right primary motor cortex(pmc), the SMA and the left and right anterior cerebellum(ac). The averaging process showed a constant signal enhancement level in the pmc and the ac and a decreasing signal enhancement in the SMA. The mean signal enhancement level in the SMA and the ac was only 70 % of the pmc level. A post-stimulus undershoot could only be observed in the pmc.