Fig. 5.

Dependency of STNr LFP band changes on effort levels. Power changes relative to baseline are presented for the period from response onset to time of peak force. Note beta band power suppression was progressively enhanced over SRE levels 0 to 5 and then plateaued, whereas gamma power increases were variable until SREs ≥ 5, following which there was a monotonic increase. Activities in the high frequency band tended to increase with increasing SRE, but the relative change was much smaller than in the gamma band and there were dips at the lowest and highest effort levels. Synchronisation in the theta/alpha band was very variable between subjects and displayed no consistent relationship with SRE level. Error bars are SEMs.