On a good wicket

Here are some examples of wicket waves in the occipital and temporal regions from a patient who is 33 years old:

It is always a good idea to pay attention to background rhythms whenever you look at an EEG. When you do so, you are getting get a "sighter". In cricketing parlance, this is an early look oat what is going on and what to expect.

 The above page contrasts with the first, eyes open and eyes closed respectively

 In the page above, it is worth comparing the reappearance of alpha at the time of eye closure above the 5th ECG beat and at T6 following the 9th ECG beat. Sometimes these latter waveforms at T6 will not be sequential and will appear as a "wicked spike".

 Notice how sharp the wicket waves become at T6 between the 6th and 7th ECG beats above

 Temporal wicket waves

In the page above, notice at 5s how eye closure produces the return of alpha rhythms, initially more widely synchronous, but also much sharper than seen later. When the alpha appears, it is also slower, giving a clear indication of very mild drowsiness, consistent with the slowness of the eye closure and the initial, transient anterior propagation of the alpha rhythms. Notice the "wicket spike" morphology when confining your gaze to the parietal derivations.

In the above page, notice particularly the wicket morphology at T6 and P4 and about 5 seconds, and don't be surprised when the wicket spikes come along