Maybe some bluetooth sensor to a raspberry pi to your phone Either one or two sensors, first one matbe gyroscope, second one maybe electrode or similar for mus

Maybe some bluetooth sensor to a raspberry pi to your phone Either one or two sensors, first one matbe gyroscope, second one maybe electrode or similar for muscle activation (ten to a hundred times more expensive upon googling) Some algorithm saying if the movement is squiggly enough and if the combined sensors are activityful maybe give u a text or call or push notice with higher prediction percent displayed if both active Or just do that with the gyroscope only, display the movement graph over time and u can use your intuition on the movement pattern to see if its a false positive or not And obviously i forgot about bodycam People even stream their cats lives with bodycams i think u should be able to see if its having a seizure as for detection idk maybe something neural detecting the same scene shaking, worst case scenario pay amazon mturk or something