Submission 553
Identifying Neural Correlates Underlying Motor Hysteresis with EEG
Posterwall-06
Presented by: Tim Redepenning
Motor actions, like perception, can be shaped by recent experience. When a previously executed motor plan biases the selection of a current action—such that the motor system tends to repeat the preceding plan—this phenomenon is termed motor hysteresis. Motor hysteresis has been demonstrated across a variety of tasks and is thought to reflect short-term memory traces within motor planning networks. The ongoing study investigates neural correlates of motor hysteresis using a virtual-reality paradigm combined with EEG. Preliminary data is presented. Participants (n = 13, mean age = 23.1 years, 7 females) were instructed to intercept balls rolling down an inclined virtual table by pressing a button as soon as a ball reached the catching zone. Balls could appear on one of nine lanes. To evoke hysteresis, we systematically manipulated the order in which lanes were presented: in one condition, balls appeared in an ordered left-to-right or right-to-left progression; in a second condition, they appeared in a pseudo-random sequence. We analysed the response data using a generalized linear mixed model (logistic link). The model revealed significant main effects of lane, z = 14.928, p < .001, odds ratio (OR) = 48.03, and direction, z = 2.912, p = .0036, OR = 2.09, indicating that participants’ motor responses were biased by the recent motor plans. These behavioural findings demonstrate robust motor hysteresis. Thereby, they fulfil the prerequisites for the further analyses of the concurrently recorded EEG data, which will be presented at the conference.