Table 2.
Group-averaged data
| 20% SNAP | 21% SNAP | 47% SNAP | 55% SNAP | 71% SNAP | 84% SNAP | 100% SNAP | |
|---|---|---|---|---|---|---|---|
| MN SEP 1, μV | 4.78 | 5.82* | 6.33* | 6.19* | |||
| SE | 0.48 | 0.57 | 0.53 | 0.56 | |||
| MN SEP 2, μV | 2.03 | 2.22 | 2.29 | 2.37 | |||
| SE | 0.26 | 0.33 | 0.36 | 0.36 | |||
| MN SAI, % | 0.81 | 0.66* | 0.74 | 0.76 | |||
| SE | 0.08 | 0.04 | 0.07 | 0.07 | |||
| DN SEP, μV | 1.17 | 1.82* | 2.21* | 2.53*† | |||
| SE | 0.13 | 0.13 | 0.21 | 0.24 | |||
| DN SAI (FCR), % | 0.95 | 0.80* | 0.76* | 0.67* | |||
| SE | 0.05 | 0.04 | 0.05 | 0.05 | |||
| DN SAI (FDI), % | 0.86 | 0.55* | 0.67* | 0.59* | |||
| SE | 0.11 | 0.04 | 0.08 | 0.06 |
Values are group-averaged values for somatosensory evoked potential (SEP) and short-latency afferent inhibition (SAI) with standard error (SE) for both the median (MN) and digital (DN) nerves at each percentage of the actual maximum sensory nerve action potential (SNAP). MN SAI was evoked in the flexor carpi radialis (FCR), while DN SAI was performed in both the FCR and the first dorsal interosseous (FDI). For MN SEP 1, 47%, 71%, and 100% SNAPmax are larger than 20% SNAPmax (*). For MN SAI, 47% is larger than 20% SNAPmax (*). For DN SEP, 55%, 84%, and 100% are larger than 21% SNAPmax (*) and 100% is larger than 55% SNAPmax (†). For DN SAI in both FDI and FCR a main effect of intensity shows greater SAI at 100%, 84%, and 55% compared with 21% SNAPmax (*).