TABLE 2.

Definition of temporal synchronization in positive and negative mapping.

Mode	Definition of ΔTS (time difference between the moment of event A and B)		Calculation of ΔTS
	Event A	Event B	Left hand	Right hand
Positive mapping	Starting to inhale	Starting to increase force	∣T(B1) − T(L1)∣	∣T(B1) − T(R1)∣
	Inhalation end	Force reaching the maximum	∣T(B2) − T(L2)∣	∣T(B2) − T(R2)∣
	Starting to exhale	Starting to decrease force	∣T(B3) − T(L3)∣	∣T(B3) − T(R3)∣
	Exhalation end	Force reaching the minimum	∣T(B4) − T(L4)∣	∣T(B4) − T(R4)∣
Negative mapping	Starting to exhale	Starting to increase force	∣T(B1) − T(L1)∣	∣T(B1) − T(R1)∣
	Exhalation end	Force reaching the maximum	∣T(B2) − T(L2)∣	∣T(B2) − T(R2)∣
	Starting to inhale	Starting to decrease force	∣T(B3) − T(L3)∣	∣T(B3) − T(R3)∣
	Inhalation end	Force reaching the minimum	∣T(B4) − T(L4)∣	∣T(B4) − T(R4)∣