Spasticity is characterized by increased muscle tone, hyperactive reflexes, and possible clonus or rigidity. The increased muscle tone may result in loss of joint motion, leading to contractures. Treatment of established contractures is difficult.

What is the difference between spasticity and contracture?

Spasticity and contractures are conditions in which muscle imbalance across a joint leads to abnormal positioning and tightness. Spasticity refers to involuntary tightening or stiffening of muscles. The term contracture refers to abnormal positioning of a joint.

How do muscle contractures occur?

Trauma or Injury

Injury to muscles or tendons can cause contractures as scar tissue develops, joining muscle fibers and joints together. This development significantly restricts movement. Large burns also can cause contractures of the skin, muscles, and joints.