Logan Steele
Muscle-destroying diseases include muscular dystrophy and muscle atrophy. Muscular dystrophy is a group of inherited genetic diseases that cause progressive weakness and degeneration of skeletal muscles. The defective genes interfere with the production of proteins needed to form healthy muscles. There are many types of muscular dystrophy, with Duchenne muscular dystrophy (DMD) being the most common. DMD affects boys more than girls and causes muscle weakness, breathing difficulties, and swallowing problems. On the other hand, muscle atrophy refers to the wasting or thinning of muscle mass. It can be caused by disuse of muscles or neurogenic conditions affecting the nerves that connect to the muscles. While muscle atrophy can be reversed through exercise and a healthy diet, muscular dystrophy has no cure, although medications and therapy can help manage symptoms.
| Characteristics | Values |
|---|---|
| Name of disease | Muscular Dystrophy (MD) |
| Types | Facioscapulohumeral (FSHD), Congenital, Limb-girdle, Duchenne, Becker, Myotonic |
| Cause | Genetic mutations that interfere with the production of proteins needed to form healthy muscle |
| Symptoms | Progressive muscle weakness and loss of muscle mass, trouble walking, swallowing problems, breathing difficulties, bone thinning, scoliosis, cognitive and behavioral impairments |
| Treatment | Medications and therapy can help manage symptoms and slow the course of the disease |
| Prevalence | Occurs worldwide and affects people of all races and ages; the most common variety, Duchenne, usually occurs in young boys |
| Inheritance | Autosomal dominant inheritance, autosomal recessive inheritance |
Explore related products
What You'll Learn
Muscular Dystrophy (MD)
There are more than 30 types of MD, and they vary in age of onset, severity, and the pattern of affected muscles. All forms of MD worsen over time as muscles progressively degenerate and weaken. Many people with MD eventually lose the ability to walk and may need to use a wheelchair. Some types of MD also affect organs such as the heart, lungs, gastrointestinal system, endocrine glands, spine, eyes, brain, or other organs. Some people with MD may develop swallowing disorders, breathing difficulties, respiratory infections, bone thinning, scoliosis (curving of the spine), and cognitive and behavioural impairments.
The main sign of MD is progressive muscle weakness. Specific signs and symptoms depend on the type of MD and begin at different ages and in different muscle groups. Symptoms can include trouble using arms, shortening of muscles or tendons around joints (contractures), and difficulty lifting the front part of the foot. Some types of MD can cause muscle weakness in the face, hip, and shoulders, with the shoulder blades sticking out like wings when the arms are raised.
MD occurs in both sexes and all ages and races, although the most common variety, Duchenne MD, usually occurs in young boys. Girls can be carriers and mildly affected, but it is much more common in boys. People with a family history of MD are at higher risk of developing the disease or passing it on to their children. MD is not contagious and cannot be caused by injury or activity. While there is currently no cure for MD, medications and therapy can help manage symptoms and slow the course of the disease.
Pushups: The Ultimate Muscle Builder?
You may want to see also
Explore related products
Duchenne MD
Duchenne Muscular Dystrophy (DMD) is a severe type of muscular dystrophy that predominantly affects boys. It is a genetic disorder characterised by progressive muscle degeneration and weakness due to alterations in a protein called dystrophin, which helps keep muscle cells intact. Dystrophin is essential for maintaining the muscle fibres' cell membrane integrity. Without it, muscles are not able to function or repair themselves properly, leading to progressive muscle loss.
DMD usually begins around the age of four, with rapid progression. Initially, muscle loss occurs in the thighs and pelvis, later extending to the arms, which can lead to difficulties in standing up. By the age of 12, most individuals with DMD are unable to walk, and by 21, most affected individuals become essentially "paralysed from the neck down". Other symptoms include scoliosis, intellectual disability, and breathing difficulties. The median life expectancy is 27–31 years, but with comprehensive care, some individuals may live into their 30s or even 40s.
DMD is caused by mutations or deletions in any of the 79 exons encoding the large dystrophin protein. It follows an X-linked recessive inheritance pattern, with approximately two-thirds of cases inherited from the mother and one-third resulting from spontaneous mutations. Girls are typically carriers of the disease, but in rare cases, they can manifest varying ranges of physical symptoms and are referred to as "manifesting carriers".
Currently, there is no cure for DMD. However, medications and therapies can help manage symptoms and slow the course of the disease. Corticosteroids, for example, can be used to slow muscle degeneration, and physical therapy, orthopedic braces, and corrective surgery may help with some symptoms. Gene therapy and antisense drugs are also being developed to address the root cause of the disease.
Building Muscles: Strategies to Gain Mass and Tone Up
You may want to see also
Explore related products
Myotonic Dystrophy
DM is the most common muscular dystrophy in people of European ancestry, affecting at least 1 in 8,000 people worldwide. The prevalence of DM varies among different geographic and ethnic populations, with a prevalence of about 10 cases per 100,000 individuals. In most populations, type 1 is more common than type 2.
The main symptoms of myotonic dystrophy include muscle atrophy (wasting) and muscle weakness, which get progressively worse over time. Myotonia is often the main initial symptom and is more obvious after rest, improving with muscle activity. It can affect distal muscle weakness, resulting in difficulty with fine motor tasks involving the hands and an impaired gait due to foot drop. DM can also impact various body systems, including the skeletal muscles, heart muscles, cardiovascular system, endocrine system, and central nervous system.
There is currently no cure for myotonic dystrophy, but certain treatments and therapies can help manage symptoms and improve quality of life.
Enhancing Muscle Function: Strategies for Optimal Performance
You may want to see also
Explore related products
Muscle Atrophy
There are many treatments for muscle atrophy, including physical therapy, ultrasound therapy, and in some cases, surgery. An exercise program may also help treat muscle atrophy. Exercises may include swimming to reduce muscle workload, and other types of rehabilitation.
Scapula Muscle Massage: Techniques for Self-Care and Relaxation
You may want to see also
Explore related products
Neurogenic Atrophy
The diagnosis of neurogenic atrophy typically involves a physical examination and an assessment of the patient's symptoms. Healthcare providers may also recommend specific tests, such as blood tests, muscle or nerve biopsies, electromyography (EMG), nerve conduction studies, computed tomography (CT) scans, and magnetic resonance imaging (MRI) scans.
Unlike other forms of muscle atrophy, neurogenic atrophy often cannot be reversed because of the physical damage to the nerves. Treatment options depend on the specific type of atrophy and may include physical therapy, ultrasound therapy, or, in certain cases, surgery.
Sternum: Bone or Muscle? Understanding the Difference
You may want to see also
Frequently asked questions
Muscular dystrophy (MD) is a group of inherited diseases that cause progressive weakness and degeneration of skeletal muscles. There are more than 30 types of MD, and all forms grow worse over time as muscles degenerate and weaken. MD is caused by abnormal genes (mutations) that interfere with the production of proteins needed for healthy muscle.
The symptoms of MD vary depending on the type and can include muscle weakness, wasting away of muscle tissue, and possible deformity. Some people with MD may experience trouble walking or using their arms, while others may develop swallowing disorders or breathing difficulties. MD can also affect organs such as the heart, lungs, and brain.
While there is currently no cure for muscular dystrophy, medications and therapies can help manage symptoms and slow the course of the disease. People with MD may require assistive devices such as wheelchairs or breathing aids as the condition progresses.
Muscle atrophy is the wasting or thinning of muscle mass. It can be caused by disuse of muscles or neurogenic conditions affecting nerves connected to the muscles. Muscle atrophy can lead to a decrease in muscle mass, weakness, and numbness or tingling in the limbs. In some cases, muscle atrophy can be reversed through exercise and improved nutrition.
Yes, there are several neuromuscular disorders that can affect muscles, nerves, or the neuromuscular junction. These include inflammatory myopathy, progressive muscle weakness, and cardiomyopathy (heart muscle weakness). Additionally, diseases such as amyotrophic lateral sclerosis (ALS) and Guillain-Barre syndrome can also lead to muscle destruction.
