Frontal lobe seizures versus functional seizures? Teenager

The EEG is normal during wakefulness. What do you make of the following discharges during sleep?

The epoch is taken from sleep:

Here is the above page, represented on the anterior-posterior bipolar montage:

Here are the above pages represented on coronal montage:

Before reading on, try to arrive at a diagnosis.

Here is another page, again represented on three different montages:

Here is a third page:

These discharges are nothing more than trains of vertex waves; notice that the frequency of these waveforms does not change over time. These waves have been selected because the top three pages, in particular, demonstrate discharges that strongly resemble epileptic seizures or sequential spike and slow wave discharges. If these pages don't spook you, you have been well vaccinated!