From someone who suffered seizures from a head injury as a child.......that was not a seizure. If it had been a grand mal seizure she would have lost consciousness and needed medical attention.
Could be something neurological where it affects the muscles in her neck.
The blinking eyes could be indicative of some petty mal seizures.
It was uncontrollable no matter what it was. That with her coughing fits says she has some condition.sss@aås555556