EMG: Fasciculations (video 2)

This EMG shows irregular spontaneous firing of motor neurons which are called fasciculations of the right tibialis anterior muscle. Audibly, it can be compared to popcorn popping in the microwave. Fasciculations can be normal and benign if rare, but when they are frequent, they can represent acute muscle denervation. Widespread fasciculations involving many muscles can be appreciated with motor neuron disease (ALS), benign fasciculation syndrome, and cramp fasciculation syndrome.