Table 1.

Details of the phase lag and frequency modulations of s₁.

	Interval 1 [0-20.48]	Interval 2 [20.48-40.96]	Interval 3 [40.96-61.44]	Interval 4 [61.44-81.92]	Interval 5 [81.92-102.4]
s1
High frequency = 1 Hz	Φ = 0°	Φ = 90°	Φ = 0°	Φ = 90°	Φ = 180°
Intermediate frequency = 0.75 Hz	∅	∅	∅	Φ = 180°	Φ = 90°
Low frequency = 0.5 Hz	Φ = 0°	Φ = 0°	Φ = 90°	∅	∅

Φ represents the value of the phase lag and ∅ represents the interval where the frequency associated is not present in the time-series.