Table 2.
Side | Muscle | Nerve | Root | Ins act | Fibs | PSW | Amp | Dur | Poly | Recruitment | Int pat |
---|---|---|---|---|---|---|---|---|---|---|---|
Right | Anterior tibialis | Peroneal | L4-5 | Normal | Normal | Normal | Normal | Normal | 0 | Reduced | 25% |
Right | Medial gastrocnemius | Tibial | S1-2 | Normal | Normal | +1 | Normal | Normal | 0 | Reduced | 25% |
Right | External hallucis longus | Peroneal | L5-S2 | Normal | Normal | Normal | Normal | Normal | 0 | Reduced | 25% |
Right | Vastus medialis | Femoral | L2-4 | Normal | Normal | +1 | Normal | Normal | 0 | Reduced | 25% |
EMG reveals normal muscle membrane potential (as indicated by normal insertional activity {Ins Act}, fibrillations {Fibs} and positive sharp waves {Psw}) and intact action potential (as indicated by normal amplitude {Amp}, duration {Dur}, Polyphasic activity {Poly}). Study also reveals significantly reduced nervous system output (as indicate by recruitment {Recrt}, interference pattern {Int Pat}. Note: only 25% of the nervous system output was reaching the mentioned muscle.