Neurophysiological studies
Upper limbs (NCS) | |||||
A: Sensory nerve action potentials | |||||
Nerve | Digit | Right | Left | ||
Conduction velocity (m/s) | Amplitude (μV) | Conduction velocity (m/s) | Amplitude (μV) | ||
Median | III | 56 | 33.9 |
Upper limb surface EMG | ||||||
Muscle | APB | ADM | APB | ADM | FDI | |
Side | R | R | L | L | L | |
CMAP (mV) | 7.8 | |||||
Terminal motor latency (ms) | 3.5 | |||||
Conduction velocity (m/s) | Wrist-elbow | 58 | ||||
Ulnar groove | 66 | |||||
Elbow-axilla | 63 | |||||
F-wave response (Ht 5 ft 6 in) | F-M (ms) (minimum) | 24.9 |
Lower Limbs (NCS) | ||||
B: Sensory nerve action potentials | ||||
Nerve | Right | Left | ||
CV (m/s) | Amplitude (μV) | CV (m/s) | Amplitude (μV) | |
Sural | 43 | 14 |
Lower limb surface EMG | |||||
Muscle | EDB | AH | EDB | AH | |
Side | R | R | L | L | |
CMAP | 8 | 8.7 | |||
TML (ms) | 4.8 | 4.1 | |||
Conduction velocity (m/s) | Calf | 49 | |||
F wave response (Ht 5 ft 6 in) | F-M (ms) minimum | 40.9 | 45.1 |
C: Concentric needle EMG | ||||
Muscle | Spontaneous activity | Motor units | Maximum effort | |
Number | Max size (mV) | |||
R.Biceps brachii | Fasciculations 3+ | Long-duration polyphasic units | Reduced | 2 |
R.1ST Dorsal interosseous | FIBS 2+, fasciculations 3+ | Long-duration polyphasic units | Discrete | 2 |
R.Rectus abdominis | Fasciculations 3+ | Long-duration polyphasic units | Discrete | 2 |
R.Vastus lateralis | Fasciculations 2+ | Long-duration polyphasic units | Reduced | 2 |
R.Tibialis anterior | Positive sharp waves 2+, FIBS 1+, fasciculations 1+ | Long-duration polyphasic units | Discrete | 3 |
L.Tibialis anterior | Fasciculations 2+, positive sharp waves 3+, FIBS 3+ | Long-duration polyphasic units | Discrete | 3 |
R.Medial gastrocnemius | FIBS 3+, Positive sharp waves 2+ | Long-duration polyphasic units | Discrete | 3 |
CMAP, compound muscle action potential amplitude; EMG, electromyography; NCS, nerve conduction studies; TML, terminal motor latency.