Spinal Excitability Changes after Transspinal and Transcortical Paired Associative Stimulation in Humans
Table 1
TEPs sigmoid function parameters before and after transcortical-transspinal PAS.
R-TA
L-TA
R-MG
L-MG
R-SOL
L-SOL
R-PL
L-PL
Before
After
Before
After
Before
After
Before
After
Before
After
Before
After
Before
After
Before
After
Max amplitude
93.97 ± 2.97
85.94 ± 8.36
88.20 ± 1.55
94.87 ± 6.38
96.54 ± 5.60
91.20 ± 7.93
96.71 ± 1.55
103.95 ± 5.82
94.29 ± 1.56
95.26 ± 7.64
94.60 ± 0.78
103.9 ± 13.63
90.94 ± 0.93
92.06 ± 7.21
95.41 ± 1.73
73.07 ± 8.40
m
0.24 ± 0.06
0.32 ± 0.13
0.31 ± 0.08
0.15 ± 0.03
0.15 ± 0.02
0.13 ± 0.03
0.22 ± 0.03
0.16 ± 0.02
0.22 ± 0.03
0.17 ± 0.03
0.23 ± 0.03
0.16 ± 0.02
0.19 ± 0.02
0.14 ± 0.03
0.27 ± 0.05
0.14 ± 0.03
Slope
14.59 ± 2.56
20.57 ± 4.95
10.28 ± 1.47
18.77 ± 2.87
17.85 ± 2.99
19.64 ± 2.18
11.37 ± 1.37
14.86 ± 1.61
12.45 ± 2.09
18.43 ± 3.02
10.56 ± 1.22
16.75 ± 2.83
10.98 ± 1.18
19.98 ± 4.78
9.78 ± 2.40
17.01 ± 2.44
Stimulus threshold
40.50 ± 3.92
34.80 ± 4.38
44.78 ± 3.33
41.70 ± 3.68
42.79 ± 3.99
40.46 ± 5.66
44.87 ± 3.06
44.28 ± 3.19
43.32 ± 3.96
43.08 ± 5.23
46.49 ± 3.23
45.10 ± 3.11
40.12 ± 4.73
34.79 ± 7.96
39.70 ± 4.27
35.50 ± 5.60
Stimulus, 50% max
55.09 ± 4.19
55.29 ± 5.32
55.06 ± 3.79
60.46 ± 4.43
60.64 ± 4.67
60.10 ± 4.77
56.24 ± 3.78
59.14 ± 3.80
55.77 ± 4.53
61.51 ± 4.81
57.06 ± 4.05
61.85 ± 4.29
51.09 ± 4.99
54.77 ± 4.33
49.47 ± 4.15
52.52 ± 5.57
Stimulus max
69.97 ± 5.72
75.76 ± 9.29
65.34 ± 4.69
79.23 ± 6.49
78.48 ± 6.75
79.74 ± 4.81
67.61 ± 4.79
74.01 ± 4.89
68.22 ± 5.84
79.94 ± 6.09
67.62 ± 5.03
78.61 ± 6.58
62.07 ± 5.50
74.75 ± 4.44
59.25 ± 5.26
69.53 ± 6.52
Results of predicted parameters from the sigmoid input-output relation of TEPs recorded at all points of the recruitment curve. TEPs were normalized to the homonymous maximal TEP recorded before PAS and were plotted against real stimulation intensities. This was performed separately for each subject, and averages were estimated and grouped based on time. m: slope parameter of the function. Mean ± SE. TA: tibialis anterior; MG: medial gastrocnemius; SOL: soleus; PL: peroneus longus; R: right; L: left. Italics indicate statistically significant differences before and after PAS.
