I had a motor nerve conduction study that, according to my doctor, is clean, need second opinion?

I had a motor nerve conduction study that, according to my doctor, is clean. however, one nerve ( in the hand) showed 4.5 amplitude when the only online chart I found state it should be equal or over 5. is that serious or should I trust my neurologist when he said my motor neuron are fine ? i have no symptom in this hand at all (it’s not my dominant hand)
There was also an emg performed and all results were clean, same for sensory nerve conduction study.



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