Movement slope (MS). A) Comparison of adjusted means of ME and MT at each angular deviation α for both measurement points (t1 and t2) and both groups (CG and SM). For each α value, data points for t1 and t2 are connected by a black line within each group SM and CG. B) Comparison of ME and MT at each angular deviation α for both groups NM and LM. Data points for each α value are connected by a black line between the two groups NM and LM. In A) and B), the dependence of MS with α can be visually estimated by the change of steepness or slope across the lines. The pairs (MT, ME) for times t1 and t2 and groups LM and NM are denoted by blue and red colors respectively. C) Dependence of MS with α for both CG (brown) and SM (black) groups. Downward arrows indicate the adjusted mean of angular threshold at time t2 for both groups (similar color coding). D) Dependence of MS with α for the comparison NM & LM. The downward black arrow indicates the adjusted mean of angular threshold for the LM group. The three α-ranges R1, R2, and R3 are represented in gray.