Table 1.
Correlations of HRUS and MRN-CSA with electrophysiological parameters (CMAP) and nT2, FA values. For the brachial plexus, correlation analysis has been performed with F-waves of the median nerve and for the lumbar plexus with F-waves from the tibial nerve. Significant correlations are marked.
| CSA | CV | CMAP | nT2 | FA |
|---|---|---|---|---|
| HRUS – median |
p < 0.0001
r = − 0.85, n = 17 |
p = 0.08 r = − 0.34, n = 17 |
p = 0.11 r = 0.41, n = 16 |
p = 0.0002
r = −0.87, n = 12 |
| HRUS – ulnar |
p = 0.2 r = 0.4, n = 9 |
p = 0.4 r = 0.2, n = 9 |
p = 0.003
r = 0.72, n = 15 |
p = 0.05 r = −0.56, n = 12 |
| HRUS – radial | n.a. | n.a. |
p = 0.6 r = −089, n = 15 |
p = 0.12 r = −0.42, n = 11 |
| HRUS – tibial |
p = 0.45 r = −0.03 n = 15 |
p = 0.23 r = −0.17, n = 17 |
p = 0.5 r = − 0.16, n = 16 |
p = 0.89 r = − 0.03, n = 18 |
| HRUS – fibular | n.a. | n.a. |
p = 0.09 r = 0.44, n = 15 |
n.a. |
| HRUS – brachial plexus |
p = 0.54 r = 0.20, n = 11 |
p = 0.023
r = 0.63, n = 13 |
n.a. |
CMAP, compound motor action potential; CSA, cross-sectional area; CV, conduction velocity; FA, fractional anisotropy; HRUS, high-resonance nerve ultrasound; MRN, magnetic resonance neurography; n.a., not applicable; nT2, normalized nerve T2-weighted signal.