Paroxysmal Dyskinesias (PxD)

Paroxysmal Dyskinesia (PxD)

Paroxysmal dyskinesias (PxD) is a rare episodic movement disorders in which abnormal movement of the limbs are present only during attacks. Dogs exhibit sudden attacks of involuntary movement.  

The term ‘paroxysmal’ indicates that the signs occur suddenly against a background of normality. The term ‘dyskinesia’ broadly refers to a movement of the body that is involuntary, which means that your dog has no control over the movement and remains fully aware of its surroundings. It is caused by a mutation in PIGN (phosphatidylinositol glycan anchor biosynthesis class N) gene. It is an autosomal recessive disease. SCWTCA recommends that breeding stock have the Paroxysmal Dyskinesia DNA test.

  • The average age of onset 5-15 years.
  • No loss of consciousness during the attack
  • Attacks can last anywhere from a few minutes to a couple of hours
  • The can occur in clusters
  • There is a genetic test for PxD
  • Some dogs develop paroxysmal movement disorders as a result of a structural disease (e.g. tumor, inflammation, infection, stroke..).
  • Most often the hind legs are affected but all four limbs may be affected.
  • Many dogs will still attempt to walk.
  • There is no loss of bladder control or excessive salivation during an attack
  • It is  commonly mistaken for an epileptic seizure, both by owners and by vets. 

Testing, Treatment & Reporting

  • The dog should undergo the complete Annual Health Testing Protocols
  • The dog should have a PxD DNA Test and the results of the DNA test reported to the SCWT Health Database
  • Owners are encouraged to report any diagnosis of the disease to aid in future research or if you are need of a consultation contact Liz Hansen at the University of Missouri School of Veterinary Medicine at 573-884-3712 or


Paroxysmal Dykensia Video – Meet Teddy

Paroxysmal Dykensia Video – Teddy After Medication

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