Tics

Tics aren’t necessarily a physically-located thing, they are usually related to Filtering/Control problems–not necessarily to autonomic tone.   You pretty much train to get the brain able to produce better and longer bursts of SMR in the sensory-motor cortex.   I’ve never been clear on what the particular rationale for C4/P4 (or Pz) was.

SMR training is generally good for physical control issues.   It can also be helpful for difficulty falling asleep.   It can be a little tricky with a 7-year-old to find the best training frequency.

Training at Cz/A2 or C4/A2 or C3/C4, inhibit the total EEG (squash 2-38) while training to increase SMR.

I’ve sometimes had good response with training C4/Pz in one channel, also squashing and increasing SMR. C4/P4 or C4/Pz SMR up training, blocking slow and fast are good options for tics.

As I’ve said many times (and will continue to say) you are skating on very thin ice when you pick a protocol based on a single symptom or pick one without an assessment.