Table 2 Descriptive statistics: physiologic MEP data obtained from healthy neonatal lambs for each of the 5 parameters per recording (threshold, latency, area-under-the-curve, peak-to-peak and duration). MEP, motor evoked potential; AUC, area-under-the-curve; P2P, peak-to-peak; R; right side; L, left side; FL, forelimb MEP recording; HL, hindlimb MEP recording; SD, standard deviation; ms, milliseconds.

Right motor cortex stimulation

R-FL

Threshold (Volts)

15.0 ± 5.80

10.0–25.0

Latency (ms)

15.6 ± 2.38

10.2–23.2

AUC

31.0 ± 20.78

8.1–92.6

P2P (Volts)

0.68 ± 0.54

0.14–2.57

Duration (ms)

30.9 ± 5.21

11.2–40.2

L-FL

Threshold

18.4 ± 12.30

10.0–45.0

Latency

16.9 ± 2.45

10.8–20.6

AUC

16.3 ± 13.21

3.6–57.0

P2P

0.48 ± 0.43

0.06–2.09

Duration

25.8 ± 9.59

8.5–75.2

R-HL

Threshold

26.7 ± 11.08

15.0–45.0

Latency

20.7 ± 4.63

12.4–37.1

AUC

7.1 ± 3.47

1.9–17.1

P2P

0.19 ± 0.14

0.05–0.52

Duration

25.0 ± 8.39

7.4–40.5

L-HL

Threshold

30.0 ± 12.64

15.0–55.0

Latency

19.8 ± 3.28

11.7–25.6

AUC

12.6 ± 10.41

0.3–35.8

P2P

0.23 ± 0.20

0.00–0.75

Duration

27.3 ± 8.11

10.2–40.8

Left motor cortex stimulation

L-FL

Threshold

16.7 ± 4.73

10.0–25.0

Latency

16.8 ± 1.57

13.8–21.5

AUC

23.5 ± 11.03

5.1–59.4

P2P

0.58 ± 0.45

0.01–2.06

Duration

28.9 ± 8.62

3.0–83.6

R-FL

Threshold

18.5 ± 3.92

15.0–25.0

Latency

16.0 ± 3.57

12.9–44.2

AUC

31.1 ± 15.00

1.3–75.6

P2P

0.56 ± 0.24

0.21–1.39

Duration

31.0 ± 5.76

8.7–41.1

L-HL

Threshold

24.2 ± 8.41

15.0–35.0

Latency

19.4 ± 2.70

14.7–24.7

AUC

10.3 ± 6.19

2.5–22.6

P2P

0.20 ± 0.12

0.05–0.44

Duration

28.1 ± 7.70

12.8–39.9

R-H

Threshold

31.7 ± 12.18

20.0–55.0

Latency

19.8 ± 3.76

14.6–41.7

AUC

8.6 ± 8.04

1.2–36.4

P2P

0.17 ± 0.14

0.02–0.64

Duration

26.4 ± 8.88

9.3–71.4