Related Experiment Video
Updated: Mar 31, 2026
09:39
Modeling Myotonic Dystrophy 1 in C2C12 Myoblast Cells
Published on: July 29, 2016
16.1K
Myotonic Disorders and Channelopathies
Colin Quinn1, Mohammad Kian Salajegheh2
1Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania.
Seminars in Neurology
|October 28, 2015
Summary
Myotonic dystrophies and channelopathies are rare muscle diseases. This overview details their clinical features, diagnosis, and management for better patient care.
Area of Science:
- Neurology
- Genetics
- Muscle Disorders
Background:
- Myotonic dystrophies and channelopathies are rare neuromuscular disorders.
- These conditions manifest with diverse symptoms including myotonia, muscle weakness, and atrophy.
Purpose of the Study:
- To provide a comprehensive overview of myotonic dystrophies and channelopathies.
- To describe the clinical and pathophysiological characteristics of these muscle diseases.
- To outline current diagnostic methods and management strategies.
Main Methods:
- Literature review of myotonic dystrophies and channelopathies.
- Synthesis of clinical presentations, genetic underpinnings, and diagnostic approaches.
- Summary of therapeutic interventions and patient management.
Main Results:
- Detailed description of myotonia, episodic weakness, fixed weakness, and atrophy.
- Explanation of the pathophysiological mechanisms underlying these muscle disorders.
- Overview of diagnostic tools, including genetic testing and electrophysiological studies.
Conclusions:
- Myotonic dystrophies and channelopathies require accurate diagnosis for effective management.
- Understanding the clinical and pathophysiological features is crucial for patient care.
- This review serves as a resource for clinicians managing these rare muscle diseases.
Related Concept Videos
01:28Disorders of the Skeletal Muscle
2.3K
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...
2.3K
01:26Chemical Synapses
12.4K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
12.4K
01:26Chemical Synapses
8.5K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
8.5K
01:10Muscle Contraction
9.3K
In skeletal muscles, acetylcholine is released by nerve terminals at the motor endplate—the point of synaptic communication between motor neurons and muscle fibers. The binding of acetylcholine to its receptors on the sarcolemma allows entry of sodium ions into the cell and triggers an action potential in the muscle cell. Thus, electrical signals from the brain are transmitted to the muscle. Subsequently, the enzyme acetylcholinesterase breaks down acetylcholine to prevent excessive...
9.3K
01:15Muscle Contraction
100.5K
100.5K
01:26Voltage-gated Ion Channels
13.1K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
13.1K