Abnormal peripheral action potential amplitude

What it means

An anomaly in the magnitude of the action potential along a peripheral nerve, that is, of the rapid rise and fall of the electrical membrane potential of the nerve.

Rare diseases that can present with this2

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category