Myoclonic jerk

Myoclonic jerk is a type of involuntary muscle movement. It is a symptom of a number of neurological disorders. These movements are quick and may occur in any muscle group. The jerks are usually caused by sudden muscle contractions, known as positive myoclonus, or by muscle relaxation, known as negative myoclonus.

Causes

Myoclonic jerks can be caused by a variety of conditions, including epilepsy, Parkinson's disease, Alzheimer's disease, and multiple sclerosis. They can also be triggered by certain medications or substances, such as alcohol or certain drugs.

Symptoms

The primary symptom of myoclonic jerks is a sudden, involuntary jerking of a muscle or group of muscles. The jerks can occur at any time and may be so mild that they are barely noticeable, or so severe that they disrupt daily activities. Other symptoms may include difficulty walking, clumsiness, and difficulty performing tasks that require fine motor skills.

Diagnosis

Diagnosis of myoclonic jerks typically involves a physical examination and a review of the patient's medical history. The doctor may also order tests, such as an electroencephalogram (EEG) to measure brain activity, or a magnetic resonance imaging (MRI) scan to look for abnormalities in the brain.

Treatment

Treatment for myoclonic jerks depends on the underlying cause. Medications, such as anticonvulsants and sedatives, may be used to control the jerks. In some cases, physical therapy may be recommended to help improve muscle control and coordination.

See also

• Myoclonus
• Epilepsy
• Parkinson's disease
• Alzheimer's disease
• Multiple sclerosis

Myoclonic jerk Resources
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