An important 1980 study used PET scanning to investigate the…
An important 1980 study used PET scanning to investigate the role of the supplementary motor area (SMA) in movement. Each participant was tested in 3 trials. In Trial 1 they performed a simple finger movement (touch thumb to forefinger). In Trial 2 they performed sequential finger movements (touch thumb to all other fingers, in a specific sequence). In Trial 3 they imagined performing the sequential finger movements. The researchers found that the SMA was active