What causes jerking movements with MS?
Jerking movements in MS are typically muscle spasms caused by nerve damage in your brain or spinal cord. When MS disrupts normal nerve signals, it can cause multiple muscles to contract at once in an uncontrolled way, leading to sudden jerking motions.
There are three main types of Show Full Answer
What causes jerking movements with MS?
Jerking movements in MS are typically muscle spasms caused by nerve damage in your brain or spinal cord. When MS disrupts normal nerve signals, it can cause multiple muscles to contract at once in an uncontrolled way, leading to sudden jerking motions.
There are three main types of muscle spasms:
- Flexor spasms: Your limb bends up toward your body
- Extensor spasms: Your limb shoots out away from your body
- Adductor spasms: Your limbs move toward each other (common in legs and thighs)
These spasms can last from a few seconds to 15 minutes or longer. When muscles jerk repeatedly in a rhythmic pattern, it's called clonus.
Common triggers for jerking include sudden movements, temperature changes, tight clothing, stress, infections, or having a full bladder.
Many people experience worse jerking at night, which can disrupt sleep. The jerking can affect any muscle but is most common in the arms, legs, trunk, and back.
If jerking movements are affecting your daily activities, talk to your neurologist. Treatment options include muscle relaxants like baclofen, physical therapy with stretching exercises, or Botox injections to help reduce muscle spasms.
November 29, 2025
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