Aging Does Not Affect Beta Modulation during Reaching Movements

Figure 1

Experimental design and kinematic measures. (a) Testing set up. (b) Upper line: target display on the screen with the appearance of the target (left); the hand-path display during the movement (center); in grey, the hand-path area (left). Bottom line: temporal profile of trajectory velocity with the kinematic parameters used in the analyses. (c) Definition of the regions of interest (ROIs): the left and the frontal ROIs (black dots) with Cz, Fz, and C3 (grey dots). (d) Representation of beta power changes related to target appearance, movement onset, and end. The peak of event-related desynchronization (ERD) is followed by a rebound (or event-related synchronization, ERS) after the movement end. Beta modulation is defined as the difference between ERD and ERS power.