What is electroneurography?

Electrography is a diagnostic procedure that assesses the function of motor and sensory nerves. The procedure involves stimulating a motor or sensory nerve with an electrical impulse and measuring the conduction of the impulse within the stimulated nerve. In cases of nerve damage, the speed (nerve conduction velocity) or the extent of impulse conduction (sum action potential) may be reduced.

Along with electromyography (EMG) and motor-evoked potentials (MEP), electroneurography is part of electrophysiological testing used to support the clinical diagnosis of ALS. Electroneurography is not specific to ALS; rather, it is used for the diagnosis of a wide range of neurological disorders.