It sounds like a seizure like event. Since they do not manifest like any of the garden variety seizures, the neuro is in the dark.
I have had similar episodes. Sometimes, I am just confused while full functional from a motor control perspective. With me they manifest at two extremes. One is like an anxiety attack. Everything is just too chaotic and I can't focus on any of it. The other extreme is when I feel like a zombie and nothing is 'clicking.'
It will help for you to figure out how to recognize when they happen. He probably has a lost look in his eyes. Sometimes, my wife will notice me staring with a clenched jaw.
If you can recognize them, try to note what is happening just before. Maybe a noisy environment, maybe visual chaos, maybe bright or flashing lights or an emotional shock.
I can get triggered by fabric patterns, especially checkerboard patterns or patterns that have an optical illusion style (fade from one look to another)
Sometimes, fast motion will trigger a space-out, like riding in the car with a picket fence on the side of the road.
Hope this helps.
Mark in Idaho
58 years old, retired due to disability, married 33 years, father of three, grandfather of four, Suffered a serious concussion at 10 years old (1965) stopped most driving after last concussion at 46 years old (2001), Post Concussion Syndrome/Multiple Concussion/Impact Syndrome with PTSD, immediate and short term visual and auditory memory problems, slowed processing speed, visual and auditory processing difficulties, insomnia, absence seizures, OCD, 14 concussions since first concussion at 8 years old, Taking paroxetine for 14 years and gabapentin for 12 years. Added L-Tryptophan and successfully stopped all paroxetine after 3 months of tapering down. I currently take 500 mgs of L-Tryptophan when I wake up, 500 mgs after breakfast with my vitamin regimen and 500 mgs late in the evening.
As of Nov 15th, Due to high stress issues resulting in PTSD, my docs put me on three meds. Clonazepam (Klonopin, a dreaded benzo but only for 30 days ) 12.5 mgs twice daily (Doc prescribed 25 mgs twice daily but half a tablet is doing good) , citalopram (Celexa), an SSRI , and olanzapine (Zyprexa), an atypical anti-psychotic before bed. I have lost over 30 pounds since mid July. The olanzapine is supposed to help me gain some of it back but it has just stopped the weight loss. They took me off the gabapentin. Feeling much better.
"Be Still and Know That I am God" Psalm 46:10