Good examples of spiky alpha

It is important to recognise this, as sooner or later in the same recording, there will likely be isolated waves that resemble spikes or sharp waves.

The following is from a different patient. On this occasion, the alpha appears over the temporal regions. The patient is mildly drowsy (notice the slow eye movements and the shift of alpha rhythms from the occipital to the temporal regions), but these waveforms are entirely normal.