Submissions from Readers

Jerking Movement After Stroke

by Bushra Ghafar


Question: Why is there a sudden jerk on the paralyzed/flaccid side of a stroke patient? Is it normal or not?


Answer: Here are a few of the reasons stroke patients may experience sudden jerking movements:

  • Clonus Some stroke patients will experience clonus which causes large, noticeable movements that are different from typical twitches. It is often accompanied by hyperreflexia, a condition where the body's reflexes are overactive or overresponsive.

  • Myoclonus Stroke patients can also experience myoclonus, a sudden, brief involuntary twitching or jerking of a muscle or group of muscles. The twitching cannot be stopped or controlled by the person experiencing it.

  • Focal onset seizures These seizures occur in one part of the brain and can cause:

    Muscle twitching
    Falling
    Changes in sensation, such as distorted smell or taste
    Dazed or confused appearance

  • Generalized onset seizures
    These seizures affect both sides of the brain and can cause the following symptoms:

    Muscle spasms or flailing
    Loss of consciousness
    Verbal sounds
    Rhythmic muscle movements
    Stiffening
    Loss of bladder control
    Rapid eye movements or blank staring

    *Important note: Seizures can manifest in different ways, some being evident with large jerky movements or loss of consciousness but others being quite deceiving with someone simply staring into space or experiencing small twitches. This is why it is important to discuss any abnormal movements and episodes with your MD.

Both clonus and seizures can appear after a stroke. Clonus or myoclonus may be a mild annoyance or can be more serious if interfering with mobility and daily activities. Treatments may include therapy (stretching/exercises), modalities (heat/cold), and medicines.

Seizures, on the other hand, are very serious and can lead to death. Anti-seizure medication is typically used to control seizures.

By consulting with a MD, one can determine the cause of their muscle jerking/twitching and devise a treatment plan accordingly.

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About the Author

Karen Murray, MOT, CHT, CSRS, is a licensed occupational therapist,  Certified Stroke Rehabilitation Specialist, Certified Hand Therapist, and Certified Personal Trainer with over 29 years of experience working with stroke survivors in hospital, outpatient, and home settings. She created Stroke-Rehab.com to help patients and caregivers better understand recovery and regain independence at home.


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