She appeared to have an absence seizure or a petit mal seizure.
Mayo Clinic:
Absence seizures involve brief, sudden lapses of consciousness. They’re more common in children than adults. Someone having an absence seizure may look like he or she is staring into space for a few seconds. This type of seizure usually doesn’t lead to physical injury.
http://www.mayoclinic.org/diseases-conditions/petit-mal-seizure/basics/definition/con-20021252
I agree with the first post, with involuntary spasming looks more like a few second partial seizure.
It may or may not explain other known signs. I just know what I read on medline of seizures that are localized depending on the area and extent of damage and that do not spread from the focal area where they arise:
Causes
Partial seizures are the most common type of seizure in people 1 year and older. In people older than 65 who have blood vessel disease of the brain or brain tumors, partial seizures are very common.
Depending on where in the brain the seizure starts, symptoms can include:
Abnormal muscle contraction, such as abnormal head movements