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  1. Spasticity: What It Is, Causes, Symptoms & Treatment

    Spasticity is a disruption in muscle movement patterns that causes certain muscles to contract all at once. It can affect movement and speech.

  2. Spasticity - Johns Hopkins Medicine

    Spasticity is abnormal muscle tightness due to prolonged muscle contraction.

  3. Spasticity - Wikipedia

    Spasticity (from Greek spasmos- 'drawing, pulling') is a feature of altered skeletal muscle performance with a combination of paralysis, increased tendon reflex activity, and hypertonia. …

  4. What Is Spasticity? - WebMD

    May 8, 2025 · Spasticity is a condition that causes your muscles to stiffen, tighten, and contract. It happens involuntarily, which means you don’t have control over it.

  5. Spasticity – Symptoms and Causes | Penn Medicine

    Spasticity is a stiffness of the muscles. Also called hypertonia, the condition causes unusual tightness or increased toning of the muscles. Spasticity can make reflexes stronger and more …

  6. Spasticity: MedlinePlus Medical Encyclopedia

    Feb 11, 2025 · Spasticity is stiff or rigid muscles. It may also be called unusual tightness or increased muscle tone. Reflexes (for example, a knee-jerk reflex) are stronger or exaggerated. …

  7. Spasticity - PM&R KnowledgeNow

    Nov 21, 2024 · Spasticity is a motor disorder classically defined by velocity-dependent increase in tonic stretch reflexes resulting from an upper motor neuron lesion, presenting as intermittent or …