Asterixis
Asterixis (pronounced as as-ter-ik-sis) is a medical term that refers to a specific type of motor dysfunction. It is often associated with various metabolic disorders, particularly those affecting the liver or kidneys.
Etymology
The term "Asterixis" is derived from the Greek words "a" meaning "not" and "sterixis" meaning "fixed position". It was first used in medical literature in the 1960s.
Definition
Asterixis is a type of negative myoclonus characterized by irregular lapses of posture in the limbs, particularly the hands and fingers. It is often described as a "flapping tremor" due to the characteristic movement of the hands when the wrists are extended.
Causes
Asterixis is most commonly associated with metabolic disorders, particularly those affecting the liver or kidneys. It can also occur in patients with respiratory failure, heart failure, and certain neurological conditions such as Parkinson's disease.
Symptoms
The primary symptom of Asterixis is the sudden, brief loss of muscle tone, leading to a flapping movement of the hands when the wrists are extended. This can also affect other parts of the body, such as the feet or the eyelids.
Diagnosis
Diagnosis of Asterixis is primarily clinical, based on the characteristic symptoms and physical examination. Additional tests may be performed to identify the underlying cause, such as blood tests or imaging studies.
Treatment
Treatment of Asterixis involves addressing the underlying cause. This may involve medication to manage symptoms, dietary changes, or other interventions depending on the specific condition.
See also
External links
- Medical encyclopedia article on Asterixis
- Wikipedia's article - Asterixis
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