Others

Electrophysiological tests measure the electrical activity of the nervous system to diagnose problems: Electromyography (EMG): Measures the electrical activity of muscles in response to nerve stimulation. This test can help detect neuromuscular abnormalities and is performed by inserting small needles into the muscle. Electroencephalogram (EEG): Measures the electrical activity of the brain using electrodes attached to the scalp. EEG results can help diagnose brain conditions, especially epilepsy and other seizure conditions. Nerve conduction study (NCS): Measures how fast an impulse travels through a nerve. Magnetoencephalography (MEG): Senses the magnetic field produced by electrical activity in the brain. Other electrophysiological tests include: somatosensory-evoked potentials, brain stem auditory-evoked potentials, visual-evoked potentials, intraoperative monitoring, and repetitive stimulation.