Table 4.

Onset time and duration of activation of each muscle as a fraction of the cycle during movements in three anatomical planes of ALS and control group.

	Onset time				Duration of muscle activation
	Left SCM	Right SCM	Left SC	Right SC	Left SCM	Right SCM	Left SC	Right SC
Axial rotation
Control	0.114 (0.13)	0.585 (0.08)	0.265 (0.21)	0.046 (0.12)	0.312 (0.29)	0.256 (0.08)	0.646 (0.27)	0.479 (0.30)
ALS	0.101 (0.17)	0.413 (0.27)	0.216 (0.24)	0.030 (0.08)	0.493 (0.33)	0.419 (0.28)	0.723 (0.29)	0.717 (0.33)
Lateral bending
Control	0.083 (0.12)	0.474 (0.23)	0.033 (0.08)	0.234 (0.25)	0.504 (0.32)	0.424 (0.28)	0.779 (0.29)	0.627 (0.33)
ALS	0.047 (0.06)	0.409 (0.25)	0.035 (0.07)	0.125 (0.21)	0.363 (0.22)	0.426 (0.27)	0.828 (0.30)	0.828 (0.27)
Flexion–extension
Control	0.086 (0.11)	0.131 (0.15)	0.264 (0.19)	0.298 (0.19)	0.506 (0.29)	0.472 (0.36)	0.612 (0.24)	0.580 (0.24)
ALS	0.085 (0.14)	0.121 (0.21)	0.097 (0.15)	0.121 (0.16)	0.510 (0.32)	0.596 (0.32)	0.792 (0.31)	0.811 (0.23)