Dominic Stone
Muscle contracture is a condition that occurs when muscles, tendons, joints, ligaments, or other tissues tighten or shorten, causing a deformity and reduced range of motion. It is often a result of inactivity, scarring from injuries, or underlying conditions such as arthritis, cerebral palsy, or muscular dystrophy. Treatment options include physical therapy, medication, casts or splints, and in some cases, surgery. The main symptom of muscle contracture is the reduced ability to move the affected body part, often accompanied by pain.
| Characteristics | Values |
|---|---|
| Definition | A type of scarring or fibrosis in the tissues |
| Affected Areas | Muscles, joints, tendons, skin, ligaments, soft tissues, connective tissues |
| Causes | Inactivity, previous injury or wounds, burns, disuse, genetic disorders, inherited diseases, early childhood diseases, central nervous system diseases, inflammatory diseases, metabolic myopathies |
| Symptoms | Pain, loss of movement, stiffness, reduced range of motion, deformation |
| Treatment | Physical therapy, medicine, casts, orthopedic braces, surgery |
| Prevention | Regular exercise, active lifestyle |
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What You'll Learn
Muscle contracture causes
Muscle contractures are caused by the tightening and stiffening of tissues, which can be due to scarring or fibrosis. This can occur as a result of several factors, including:
Inactivity and Immobilization
Lack of movement is the leading cause of muscle contractures. This can be due to an injury, physical disability, or neurological condition that limits mobility. For example, a person who has suffered a stroke and resulting paralysis is at risk of developing muscle contractures due to immobilization.
Scarring from Injury or Burns
Injuries, burns, infected wounds, or surgery can cause significant tissue loss, leading to scarring and contractures. The tissues try to repair themselves, but the scarring can result in the tissues becoming denser, tougher, and more rigid, losing their capacity to stretch and move.
Inherited or Congenital Conditions
Some individuals are born with contractures that may be related to genetic mutations or a lack of movement in the uterus. Inherited connective tissue diseases, such as congenital myopathy, can also cause muscle contractures by affecting the development of connective tissues.
Underlying Medical Conditions
Certain medical conditions can increase the risk of muscle contractures. For example, people with severe osteoarthritis, rheumatoid arthritis, or cerebral palsy may develop contractures due to reduced mobility and muscle stiffness associated with these conditions. Additionally, diseases that affect the central nervous system, such as polio, multiple sclerosis, or Parkinson's disease, can cause muscle tightness and limit movement, leading to contractures.
Hospitalization and Immobility
Patients discharged from intensive care units or those with prolonged hospital stays are at higher risk of developing muscle contractures. Immobility during hospitalization can lead to joint and muscle stiffness and increase the likelihood of contractures.
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Muscle contracture prevention
Muscle contracture is the chronic loss of joint mobility caused by structural changes in non-bony tissue, including muscles, ligaments, fascia, and tendons. It occurs when connective tissues become stiff and lose their elasticity, resulting in a reduced range of motion. This can be caused by inactivity, scarring from injuries or burns, or underlying conditions such as arthritis.
To prevent muscle contractures, it is important to maintain an active lifestyle and perform regular exercises that promote a full range of motion. Physical therapy can also help, especially if you have a pre-existing injury or condition that may lead to contractures. Some specific prevention methods include:
- Proper positioning: For example, avoiding placing pillows under the knees while lying down to prevent knee flexion contractures.
- Stretching: Static and dynamic stretching exercises can help improve flexibility and range of motion in muscles and joints.
- Heat therapy: Applying therapeutic heat to soft tissues can help them relax and stretch, improving circulation and elasticity.
- Continuous passive motion (CPM) machines: These devices keep the affected body parts moving, preventing the formation of contractures.
- Surgery: In some cases, surgery may be required to repair ligaments or lengthen muscles, tendons, or bones damaged by contractures.
It is important to note that prevention methods should be tailored to individual needs, and seeking medical advice from a healthcare provider is recommended to determine the best course of action for preventing muscle contractures.
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Muscle contracture treatment
Muscle contracture is the continuous and involuntary contraction of muscle fibres, causing pain and preventing normal movement. It is important to treat muscle contractures swiftly to prevent the condition from becoming permanent.
Treatment
There are several treatment options for muscle contractures, including:
- Medicine — Doctors may prescribe medication to reduce inflammation and pain, such as muscle relaxants and anti-inflammatory agents.
- Physical Therapy — This is one of the most common treatments for contractures, helping to increase the range of motion and strengthen muscles. Physiotherapists can also perform massages to relax the muscle, although hot compresses should be avoided in the presence of vascular lesions.
- Occupational Therapy — This is another common treatment, which can help improve mobility and strengthen muscles.
- Casts and Splints — In some cases, wearing a cast or splint may be necessary to help stretch the tissues and improve mobility.
- Continuous Passive Motion (CPM) Machine — This machine is used to keep the affected body part moving and improve mobility.
- Surgery — In more severe cases, surgery may be required to lengthen muscles or repair damaged ligaments, tendons, or bones.
Prevention
Muscle contractures can be prevented by maintaining an active lifestyle and performing regular exercise. Warming up properly before physical activity is also important, as muscle contractures can be caused by sudden and intense movements or a failure to warm up sufficiently. Staying hydrated and maintaining a balanced diet with essential components such as magnesium, glucose, and potassium can also help prevent muscle contractures.
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Muscle contracture risk factors
Muscle contractures are caused by a variety of factors, including inactivity and scarring from previous injuries or burns. Here are some detailed risk factors for developing muscle contractures:
Inactivity and Immobilization
Inactivity is a significant risk factor for muscle contractures. When joints are immobilized in a shortened position for a prolonged period, it leads to the development of fibrous adhesion, loss of sarcomeres, and a loss of tissue extensibility. This can occur after an injury, such as a fracture, where a limb is immobilized in a cast, causing the muscle length to shorten due to disuse. Similarly, people who are bedridden or have limited mobility due to other health conditions are at risk. For example, patients discharged from intensive care units or those with severe osteoarthritis or rheumatoid arthritis often develop muscle contractures due to reduced joint movement.
Trauma and Injuries
Traumatic events such as fractures, crush injuries, burns, and arterial injuries can lead to muscle contractures. Ischemia, or restriction of blood flow, following such traumas can cause muscle tissue death (necrosis), triggering contractures. Burns, in particular, can result in significant scarring, leading to the tightening and stiffening of tissues, which is characteristic of contractures.
Genetic and Congenital Disorders
Certain genetic and congenital disorders increase the risk of muscle contractures. For instance, congenital myopathies like core myopathies, nemaline myopathies, and centronuclear myopathies can result in contractures of the extremities and spine. Additionally, genetic disorders such as muscular dystrophy and Edwards syndrome are associated with multiple contractures.
Neurological Disorders
Neurological disorders, spinal cord injuries, and myopathies can lead to muscle imbalances and increased risk of contractures. For example, cerebral palsy causes muscle tightness and limits movement, and if left untreated, can result in contractures. Similarly, in the case of partial paralysis, such as poliomyelitis, the loss of strength and muscle control is often greater in some muscles than others, leading to contractures and postural instability.
Lifestyle and Postural Habits
Lifestyle and postural habits can also contribute to the development of muscle contractures. For instance, chronic toe walking, often seen in autistic individuals due to sensory issues, can lead to muscle contractures in the calf muscles. Additionally, repetitive muscle injuries, especially in athletes or individuals with specific occupational demands, can increase the risk of contractures.
It is important to note that seeking prompt medical attention and maintaining an active lifestyle can help prevent and manage muscle contractures.
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Muscle contracture diagnosis
Muscle contracture is the abnormal contraction of muscle fibres, causing them to remain contracted and generating pain. It is caused when a muscle loses elasticity and is commonly due to inactivity and scarring from an injury or burn. It can also be caused by a decrease in satellite cells, which are necessary for muscle regeneration and repair. The symptoms of a muscle contracture depend on the muscle involved, but can be traced back to moderate muscle pain spread throughout the affected area.
Diagnosis of a muscle contracture can be done through the muscle contracture test (CHCT), which is the best laboratory test available to investigate susceptibility. The test involves exposing muscle strips to different concentrations of caffeine and halothane. A positive result is indicated by an increase in tension in the presence of a certain concentration of caffeine or halothane. However, it is important to note that there may be false-positive or false-negative results in any diagnostic test.
Other laboratory tests that have been evaluated for their diagnostic usefulness include calcium uptake into frozen muscle biopsy samples, skinned fiber testing, platelet nucleotide depletion measurement, and the measurement of abnormal proteins in MH muscle. These tests, however, have not been generally accepted due to inconsistent results.
Once a muscle contracture is diagnosed, treatment options include physical therapy, occupational therapy, casts or splints, medication, and in some cases, surgery.
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Frequently asked questions
A muscle contracture is when muscles, tendons, joints, or other tissues tighten or shorten, causing a deformity and reduced range of motion.
The main symptoms of a muscle contracture are pain and a reduced ability to move the affected area.
Muscle contractures are caused by inactivity, scarring from an injury or burn, and diseases that cause immobility, such as osteoarthritis, rheumatoid arthritis, cerebral palsy, muscular dystrophy, and multiple sclerosis.
Muscle contractures can be treated with medicine, casts, physical therapy, and surgery.
