Check it out! Explains the barking as well.
Tourette syndrome
http://www.mayoclinic.org/diseases-conditions/tourette-syndrome/symptoms-causes/dxc-20163624
I think this is the winner.
No, it isn’t Tourette’s. If it were Tourette’s we would see it all the time, or often. She has a kind of epilepsy.
http://www.epilepsy.com/learn/types-seizures/myoclonic-seizures
If it waddles/wobbles like a duck and barks like a dog...
"Dopamine-receptor–blocking drugs are associated with potential side effects including sedation, weight gain, acute dystonic reactions, and tardive dyskinesia."
Dompaine pathway being the same as that targeted by...
http://www.google.com/?gws_rd=ssl#q=tardive+dyskinesia+cocaine
...it could be...
http://theamericanmirror.com/sally-miller-hillary-and-her-coke-habit/
...a HilldaDuck!!
Maybe she is using a TENs unit for neck pain. I am using one now and have to type between jerks, I probably need to turn it down a notch.