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Table 2 The estimated parameters of the Boltzmann function for the stimulus–response curves of the silent periods in the Biceps Brachii (BB) muscle, using a nonlinear mixed model

From: Definition dependent properties of the cortical silent period in upper-extremity muscles, a methodological study

 

Rectified EMG

Non-rectified EMG

MEP onset

SP1 mean (SE)

SP2 mean (SE)

SP3 mean (SE)

SP1 mean (SE)

SP2 mean (SE)

SP3 mean (SE)

Plateau value (a) (milliseconds)

0.19 (0.06)

0.20 (0.05)

0.26 (0.06)

0.17 (0.05)

0.20 (0.05)

0.25 (0.05)

Active motor threshold (b1)

      

(% stimulator output)

62.90 (2.28)

64.56 (1.41)

65.24 (1.19)

59.46 (1.73)

62.49 (1.03)

65.24 (1.60)

Slope parameter (b2) (%)

12.20 (1.38)

12.23 (0.85)

12.38 (0.70)

10.92 (1.15)

11.27 (0.66)

12.91 (0.92)

SDres

0.02

0.02

0.03

0.01

0.02

0.02

Stimulus onset

      

Plateau value (a) (milliseconds)

0.20 (0.06)

0.20 (0.05)

0.27 (0.06)

0.19 (0.05)

0.21 (0.05)

0.25 (0.05)

Active motor threshold (b1)

      

(% stimulator output)

60.69 (2.11)

62.34 (1.35)

63.54 (1.17)

58.06 (1.54)

60.60 (0.95)

63.09 (1.33)

Slope parameter (b2) (%)

11.73 (1.33)

11.80 (0.85)

12.10 (0.72)

10.42 (1.05)

10.61 (0.65)

12.13 (0.82)

SDres

0.02

0.02

0.03

0.01

0.02

0.03

  1. SE: standard error, SD res : within subject (residual) standard deviation, SP: silent period; SP1: the earliest reoccurrence of any EMG-activity, including burst activity; SP2: the return of continuous EMG-activity, and SP3 the return of continuous EMG-activity to pre-stimulus levels.