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 can interfere with walking, movement, or speech.
See also: Muscle cramps
Muscle stiffness; Hypertonia
Spasticity is usually caused by damage to the part of the brain that is involved in movements under your control. It may also occur from damage to the nerves that go from the brain to the spinal cord.
Symptoms of spasticity include:
Spasticity may also affect speech. Severe, long-term spasticity may lead to contracture of muscles, which can reduce range of motion or leave the joints bent.
This list does not include all conditions that can cause spasticity.
Exercise, including muscle stretching, can help make your symptoms less severe. Home-based physical therapy is also helpful.
Contact your health care provider if:
Your doctor will perform a physical exam and ask questions about your symptoms, including:
Your doctor may refer you to a physical therapist. Physical therapy involves different exercises, including muscle stretching and strengthening exercises. Physical therapy exercises can be taught to parents who may then help their child do them at home.
Medicines for spasticity include baclofen, benzodiazepines (such as diazepam), clonidine, dantrolene, gabapentin, and tizanidine. Botulinum toxin can be injected into the spastic muscles. In rare cases, a pump may be inserted into the spinal fluid to directly deliver medicine to the nervous system.
Sometimes, a person may need surgery to release the tendon or to cut the nerve-muscle pathway.
Dobkin BH. Principles and practices of neurological rehabilitation. In: Bradley WG, Daroff RB, Fenichel GM, Jankovic J, eds. Bradley: Neurology in Clinical Practice. 5th ed. Philadelphia, Pa: Butterworth-Heinemann Elsevier; 2008:chap 52.
Griggs R, Jozefowicz R, Aminoff M. Approach to the patient with neurologic disease. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 418.