Figure 5

Examples of Q ₁ (τ) and Q ₂ (τ) calculated from the CRPs in Figure1. (a) and (b) Q₁(τ) calculated from the CRPs of Figure 1c and Figure 1d, respectively; (c) and (d) Q₂(τ) calculated from the CRPs in Figure 1c and Figure 1d, respectively. The maxima of Q₁(τ) were observed at τ = 1 for the both trials ((a) and (b)), revealing signals of the thumb and index finger of these trials were synchronized with a time lag of less than 0.05 s. Q₂(τ) is negative in (c), but positive in (d) at τ = 1, suggests that the first system led the second system in (c), but lagged behind the second system in (d).