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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 when you try to move or even at rest. The muscles remain contracted and resist being stretched.

  2. 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 exaggerated, which …

  3. Spasticity - Johns Hopkins Medicine

    Spasticity affects over 12 million people worldwide, including approximately 80 percent of people with cerebral palsy and 80 percent of those with multiple sclerosis. Spasticity symptoms include …

  4. What Is Spasticity? - WebMD

    May 8, 2025 · What Are the Symptoms of Spasticity? When you have spasticity, your muscles may feel heavy, freeze in a certain position, or spasm – suddenly stiffen and cause a jerk or kick.

  5. Understanding Spastic Movements: Causes, Symptoms, And Treatment

    Dec 18, 2024 · This article explains the causes, symptoms, and treatment options for spastic movements, a common issue in neurological conditions.

  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. The condition …

  7. Spasticity Management - Overview - Mayo Clinic

    Dec 20, 2024 · Spasticity may cause discomfort, difficulty with movement, and bone and joint deformity. Spasticity in the arms — it usually happens in the muscles that pull the arm toward the body and …

  8. Spasticity | Neurological Surgery - Weill Cornell

    Spasticity is a movement disorder in which muscles are abnormally contracted, resulting in stiffness, rigidity, jerky motions, awkward posture and limb positions, and speech problems.

  9. Spasticity + Movement Disorders - Tufts Medicine

    Spasticity is a condition that leads to muscle stiffness and tightness. It's usually caused by damage to nerve pathways within the brain or spinal cord that control muscle movement. Spasticity can have a …

  10. Spasticity and Movement Disorders - Nicklaus Children's Hospital

    Feb 7, 2024 · Spasticity is one form of movement disorder, that presents as increased tone or stiffness of the muscles that causes an inability to produce and control bodily movements.