Dyskinesias in Children/Adolescents

Posted by e-Medical PPT Sunday, September 12, 2010
Chorea is an abnormal involuntary movement disorder, one of a group of neurological disorders called dyskinesias.Choreia is characterized by brief, quasi-purposeful, irregular contractions that are not repetitive or rhythmic, but appear to flow from one muscle to the next.These 'dance-like' movements of Chorea often occur with athetosis(slow, writhing movement of the limbs).Ballismus is high-amplitude, violent flinging of a limb (an extreme form of chorea)

Choreia can occur in a variety of conditions and disorders.
  • Neurodegenerative diseases (Huntington’s disease)
  • Lesions of the basal ganglia
  • Drugs (Dopamine agonists, stimulants, opiates, antiepileptics, estrogens)
  • Metabolic conditions (Wilson’s, hyperthyroid, hyperglycemia, hypoglycemia, electrolyte disorders)
  • Systemic disorders (Syndenham’s, lupus, chorea gravidarum)
  • Essential chorea syndromes
  • Paroxysmal chorea
  • Choreia gravidarum
Myoclonus is brief, involuntary twitching of a muscle or a group of muscles.Contractions are called positive myoclonus; relaxations are called negative myoclonus. The most common time for people to encounter them is while falling asleep (hypnic jerk), but myoclonic jerks are also a sign of a number of neurological disorders. Myoclonic jerks may occur alone or in sequence, in a pattern or without pattern.Most often, myoclonus is one of several signs in a wide variety of nervous system disorders such as multiple sclerosis, Parkinson's disease, Alzheimer's disease, Subacute sclerosing panencephalitis and Creutzfeldt-Jakob disease (CJD), serotonin toxicity, and some forms of epilepsy.Myoclonic seizures can be described as "jumps."In juvenile myoclonic epilepsy, seizures usually involve the neck, shoulders, and upper arms. These seizures typically occur shortly after waking up. They normally begin between puberty and early adulthood.In rare cases, myoclonic seizures can be symptomatic of Lennox-Gastaut syndrome, beginning in early childhood and usually involving the face, neck, shoulders, and upper arms. In these cases, the seizures tend to be strong and difficult to control.

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1 Response to Dyskinesias in Children/Adolescents

  1. Dave Jackson Says:
  2. While it's true this can occur in patients having hyperthyroid, it is extremely rare. Normally dyskinesias is diagnosed first, then the hyper conditions.


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