Table 2 Electrophysiological observations
From: Mechanisms underlying ICU muscle wasting and effects of passive mechanical loading
Day 1 | Day 9 ± 1 | |||||
|---|---|---|---|---|---|---|
Unloaded leg | Loaded leg | P value | Unloaded leg | Loaded leg | P value | |
Motor | ||||||
Fibularis | ||||||
Amplitude (mV) | 4.7 ± 0.8 | 4.1 ± 0.6 | NS | 4.0 ± 1.1 | 3.6 ± 0.7 | NS |
CV (m/second) | 45.8 ± 2.5 | 46.6 ± 1.9 | NS | 45.6 ± 2.9 | 42.6 ± 2.2 | NS |
Latency (milliseconds) | 4.5 ± 0.3 | 4.5 ± 0.4 | NS | 4.0 ± 0.3 | 4.6 ± 0.5 | NS |
F-response (milliseconds) | 37.0 ± 3.4 | 26.4 ± 9.4 | NS | 32.1 ± 10.2 | 42.9 ± 8.7 | NS |
Tibialis | ||||||
Amplitude (mV) | 7.6 ± 0.9 | 7.8 ± 0.9 | NS | 9.6 ± 1.5 | 9.5 ± 1.4 | NS |
CV (m/second) | 44.7 ± 1.0 | 47.3 ± 2.5 | NS | 44.4 ± 1.6 | 45.6 ± 2.2 | NS |
Latency (milliseconds) | 4.0 ± 0.3 | 4.4 ± 0.3 | NS | 3.7 ± 0.2 | 4.0 ± 0.3 | NS |
F-response (milliseconds) | 49.2 ± 1.6 | 50 ± 1.4 | NS | 49.1 ± 1.8 | 42.5 ± 8.6 | NS |
Sensory | ||||||
Suralis | ||||||
Amplitude (mV) | 11.7 ± 3.5 | 8.3 ± 1.6 | NS | 10.8 ± 2.9 | 8.3 ± 1.3 | NS |
CV (m/second) | 51.9 ± 3.4 | 49.7 ± 3.3 | NS | 50.8 ± 2.1 | 38.4 ± 8.2 | NS |
Fiburalis superficialis | ||||||
Amplitude (mV) | 4.6 ± 1.3 | 6.1 ± 1.6 | NS | 6.5 ± 2.9 | 7.0 ± 1.8 | NS |
CV (m/second) | 40.5 ± 7.2 | 40.6 ± 7.1 | NS | 45.5 ± 8.6 | 40.6 ± 7.0 | NS |
DMS (neCMAP:dmCMAP ratio) | 1.1 ± 0.1 | 1.4 ± 0.3 | NS | |||