Paralysis is a loss of strength in and control over a muscle or group of muscles in a part of the body. Most of the time, this is not due to a problem with the muscles themselves. It is more likely due to a problem somewhere along the chain of nerve cells that runs from the body part to your brain and back again. These nerve cells deliver the signals for your muscles to move.
There are many types and degrees of paralysis. The condition can be:
Paralysis can occur in any part of the body and is either localized, when it affects only one part of the body, or generalized, when it affects a wider area of the body.
Localized paralysis often affects areas such as the face, hands, feet, or vocal cords.
Generalized paralysis is broken down based on how much of the body is paralyzed:
A study called the Paralysis Population Survey, which was started by the Christopher and Dana Reeve Foundation and conducted by the University of New Mexico’s Center for Development and Disability, found that nearly 1 in 50 Americans is living with some form of paralysis — about 6 million people.
Muscle movement is controlled by trigger signals relayed from the brain. When any part of the relay system — such as the brain, spinal cord, nerves, or junction between the nerve and the muscle — is damaged, the signals to move do not make it through to the muscles and paralysis results. There are many ways the relay system can be damaged.
A person can be born with paralysis due to a birth defect such as spina bifida, which occurs when the brain, spinal cord, and/or the covering that protects them do not form the right way. In most cases, people get paralysis as the result of an accident or a medical condition that affects the way muscles and nerves function. The most common causes of paralysis include:
Some other causes include:
Symptoms of paralysis may vary based on the cause, but are often easy to spot. A person born paralyzed due to a birth defect, or paralyzed suddenly due to a stroke or spinal cord injury, will be partially or totally unable to move the affected body parts. At the same time, the person may experience muscle stiffness and decreased feeling in the affected body parts.
A person who becomes paralyzed due to a medical condition might lose muscle control and feeling slowly. The person might feel tingling or numbing sensations or muscle cramps before losing control of his or her muscles.
Because paralysis can happen to any muscle or group of muscles, many body functions can be affected. Some of the problems that can occur along with paralysis include:
Diagnosing paralysis is often easy to do because the main symptom — loss of muscle control in a body area — is obvious. An important part of the diagnosis is to determine the cause of the paralysis. This can be relatively straightforward if the paralysis occurs after an event such as a stroke or spinal cord injury. Sometimes, the doctor might want to learn more about the injury that’s causing the paralysis, the degree of the paralysis, and/or the state of the nerves involved. To do that, the doctor might use one or more of these tests:
Currently, there is no cure for paralysis itself. In certain cases, some or all muscle control and feeling returns on its own or after treatment of the cause for the paralysis. For example, spontaneous recovery often occurs in cases of Bell’s palsy, a temporary paralysis of the face. It might also occur to some extent with treatment after a stroke. Sometimes, treatment is important to prevent further worsening of paralysis, for example in multiple sclerosis.
Rehabilitation is often recommended to address problems that can occur as a consequence of the paralysis, to enable the paralyzed person to live as independently as possible and to provide the person with a high quality of life. Some of the rehabilitation treatments used for people with paralysis include:
The evolution of paralysis depends on the cause, but in most cases the paralysis cannot be fully reversed. Paralysis, especially sudden paralysis, leads to many emotions.
For this reason, depression is common in people with paralysis. Help is available to cope with this difficult life transition. Having paralysis often requires making major changes to your way of life. People with some types of paralysis, such as monoplegia, hemiplegia, and paraplegia, can usually lead independent and active lives with the help of mobility aids and supportive and adaptive devices. While people with quadriplegia need lifelong care and support from others, they can still live happy and fulfilling lives.
It is important for people with paralysis to keep a healthy lifestyle. This includes remaining as physically active as possible, and exercising on a regular basis. Exercises can be adapted to take into account the limitations related to paralysis.
Call your healthcare provider if you experience any numbing or tingling feelings in your muscles, or if you suddenly cannot move a muscle or body part.
Also, call 9-1-1 right away if you have any of the signs of a stroke. A stroke is a medical emergency and effective treatments are available, but they must be started within a few hours after stroke symptoms begin.
The American Stroke Association uses the word F.A.S.T. as a guide to identify a stroke and call 9-1-1:
These other symptoms, all of which come on suddenly, may appear separately or in combination with F.A.S.T. signs:
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This information is provided by the Cleveland Clinic and is not intended to replace the medical advice of your doctor or healthcare provider. Please consult your healthcare provider for advice about a specific medical condition. This document was last reviewed on: 04/21/2017