Short answer · Medically reviewed summary · Last updated: 2026-05-08
Paroxysmal Kinesigenic Choreathetosis (PKC), also known as Paroxysmal Kinesigenic Dyskinesia (PKD), is a rare neurological movement disorder characterized by brief, sudden attacks of involuntary movements triggered by a sudden voluntary movement. These episodes typically last less than one minute and can occur multiple times throughout the day, though they do not involve a loss of consciousness. What are the symptoms and body systems affected by Paroxysmal Kinesigenic Choreathetosis? Paroxysmal Kinesigenic Choreathetosis affects the motor system, specifically the basal ganglia, which regulates movement.
What is Paroxysmal Kinesigenic Choreathetosis / Dyskinesia
What is Paroxysmal Kinesigenic Choreathetosis / Dyskinesia? Plain-language, medically reviewed definition plus the lived reality told by patients.
Paroxysmal Kinesigenic Choreathetosis (PKC), also known as Paroxysmal Kinesigenic Dyskinesia (PKD), is a rare neurological movement disorder characterized by brief, sudden attacks of involuntary movements triggered by a sudden voluntary movement. These episodes typically last less than one minute and can occur multiple times throughout the day, though they do not involve a loss of consciousness.
What are the symptoms and body systems affected by Paroxysmal Kinesigenic Choreathetosis?
Paroxysmal Kinesigenic Choreathetosis affects the motor system, specifically the basal ganglia, which regulates movement. During an episode, a person may experience involuntary jerking (chorea), twisting (athetosis), or stiffening (dystonia) of the limbs. These movements are often unilateral (affecting one side) or bilateral and are specifically precipitated by a sudden movement, such as standing up quickly or starting to run. Patients with Paroxysmal Kinesigenic Choreathetosis report that the attacks are brief, usually lasting only seconds to a minute, and patients remain fully conscious during these events.
How common is Paroxysmal Kinesigenic Dyskinesia and who is affected?
Paroxysmal Kinesigenic Dyskinesia is a rare disorder with an estimated prevalence of 1 in 150,000. It typically presents in childhood or adolescence, usually between the ages of 5 and 15 years. While it affects both genders, it is noted to be more common in males with a ratio of approximately 3:1. Because it is a rare condition, our community at DiseaseMaps.org currently supports 7 individuals who are navigating the challenges of living with this diagnosis.
What causes Paroxysmal Kinesigenic Choreathetosis?
The majority of cases of Paroxysmal Kinesigenic Choreathetosis are linked to mutations in the PRRT2 gene, which is involved in synaptic transmission and neurotransmitter release. Key characteristics of the condition include:
- Trigger-based: Episodes are reliably triggered by sudden voluntary movement.
- Short duration: Attacks typically last less than 60 seconds.
- Refractory period: Patients often experience a period after an attack where they are less susceptible to another.
- Treatment response: Symptoms often respond very well to low doses of anticonvulsant medications.
Next steps
- Consult a neurologist, specifically a movement disorder specialist, to discuss an accurate diagnosis and treatment plan.
- Keep a movement diary to track the frequency and specific triggers of your episodes.
- Join the DiseaseMaps.org community to connect with other families and individuals living with Paroxysmal Kinesigenic Choreathetosis.
Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.
References
- Orphanet: Paroxysmal kinesigenic dyskinesia (ORPHA:247264)
- NIH GARD: Paroxysmal kinesigenic dyskinesia
- OMIM: Dyskinesia, familial, paroxysmal kinesigenic (Entry #128200)
- PubMed: Clinical and genetic features of PRRT2-associated disorders
