Table 4.

Experiment 3

1 mA pre1 mA post 12 mA pre2 mA post 1
Blink reflex: R1 peak timea
    100%8.5 ± 0.48.8 ± 0.28.6 ± 0.38.7 ± 0.2
    110%8.1 ± 0.58.4 ± 0.38.4 ± 0.28.5 ± 0.3
    120%8.0 ± 0.68.2 ± 0.58.5 ± 0.28.3 ± 0.2
    130%8.2 ± 0.58.5 ± 0.38.3 ± 0.48.5 ± 0.2
    140%8.0 ± 0.38.0 ± 0.58.3 ± 0.38.3 ± 0.3
Blink reflex: R2 ipsilateralb
    100%7.5 ± 2.57.9 ± 2.06.3 ± 0.66.8 ± 1.0
    110%7.9 ± 2.77.3 ± 1.66.9 ± 0.86.8 ± 1.0
    120%8.3 ± 2.87.6 ± 1.87.6 ± 0.97.5 ± 1.2
    130%8.9 ± 2.67.6 ± 1.68.1 ± 0.97.1 ± 1.0
    140%8.1 ± 2.87.7 ± 1.58.7 ± 1.18.0 ± 1.1
Blink reflex: R2 contralateralc
    100%5.4 ± 1.75.7 ± 1.74.4 ± 0.64.6 ± 1.1
    110%5.4 ± 1.75.6 ± 1.94.8 ± 0.94.7 ± 1.0
    120%6.3 ± 2.25.9 ± 1.95.2 ± 0.95.2 ± 1.1
    130%6.7 ± 2.36.0 ± 1.95.6 ± 0.85.2 ± 1.3
    140%6.2 ± 2.05.9 ± 1.95.5 ± 1.15.4 ± 1.2
  • aA recruitment curve assessed the blink reflex at five intensities (100, 110, 120, 130, and 140% of brainstem evoked potential) over time (pre, post 1) and stimulation intensity (1 mA, 2 mA). Values represent the time point (in milliseconds) of the peak evoked potential.

  • bValues indicate the rectified and summed EMG data between 50 and 90 ms after stimulation in the ipsilateral orbicularis oculi muscle (mean ± SEM).

  • cValues represent a similar measure to R2 ipsilateral but with the contralateral orbicularis oculi muscle (mean ± SEM).