Related Experiment Video
Updated: Jun 14, 2025
09:18
Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy
Published on: January 12, 2019
10.3K
Comprehensive four-year disease progression assessment of myotonic dystrophy type 1
Leandre A la Fontaine1, Johanna E Bruijnes1, Fran Hp Smulders2
1Department of Neurology, Maastricht University Medical Centre+, P. Debyelaan 25, Maastricht 6229 HX, the Netherlands; Mental Health and Neuroscience Research Institute, Maastricht University, Universiteitssingel 40, Maastricht 6229 ER, the Netherlands.
Neuromuscular Disorders : NMD
|August 31, 2024
Summary
Myotonic dystrophy type 1 (DM1) progression shows muscle weakness and reduced daily activities over four years. Interestingly, myotonia improved, possibly due to decreased grip strength in DM1 patients.
Area of Science:
- Neurology
- Genetics
- Clinical Medicine
Background:
- Myotonic dystrophy type 1 (DM1) is a complex neuromuscular disorder.
- Characterized by progressive muscle weakness and myotonia, DM1 impacts daily life.
- Understanding DM1 progression is crucial for patient management.
Purpose of the Study:
- To investigate the four-year progression of muscle strength and function in DM1 patients.
- To analyze changes in muscle strength, myotonia, and daily living limitations.
- To identify factors influencing DM1 disease progression.
Main Methods:
- Longitudinal study of 187 DM1 patients over four years.
- Assessed muscle strength (MRC-sumscore), grip strength (Martin-Vigorimeter), myotonia (relaxation time), and daily activities (DM1ActivC).
- Statistical analysis to determine disease progression patterns and influencing factors.
Main Results:
- Significant decline in muscle strength, particularly in distal muscles.
- Decreased hand-grip strength, with variations by sex and phenotype.
- Observed improvement in myotonia, correlated with decreased grip strength.
- Reduced DM1ActivC scores indicated decreased activity and social participation.
Conclusions:
- DM1 progression is heterogeneous, influenced by sex, phenotype, and disease status.
- Combining multiple outcome measures is essential for a comprehensive understanding of DM1.
- The study highlights a nuanced disease progression requiring tailored patient care strategies.
Related Concept Videos
01:15Myasthenia Gravis: Diagnostic Tests
705
Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
705
01:20Myasthenia Gravis: Overview and Treatment
1.3K
Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which...
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which...
1.3K
01:28Disorders of the Skeletal Muscle
905
The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
905
01:21Satellite Stem Cells and Muscular Dystrophy
1.9K
Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
1.9K
02:07Tumor Progression
6.3K
Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
6.3K