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Distal myopathy. Red depicts the preferentially affected areas in distal myopathy. Distal myopathy is a group of rare genetic disorders that cause muscle damage and weakness, predominantly in the hands and/or feet. Mutation of many different genes can be causative. Many types involve dysferlin.
Muscle weakness is a lack of muscle strength. Its causes are many and can be divided into conditions that have either true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular junction disorders, such ...
Distal muscles in hands, forearms and lower legs Progress is slow and not life-threatening. [17] Miyoshi myopathy, one of the distal muscular dystrophies, causes initial weakness in the calf muscles, and is caused by defects in the same gene responsible for one form of limb–girdle muscular dystrophy. [13] Emery–Dreifuss muscular dystrophy ...
Inclusion body myositis (IBM) (/ maɪoʊˈsaɪtɪs /) (sometimes called sporadic inclusion body myositis, sIBM) is the most common inflammatory muscle disease in older adults. [ 2 ] The disease is characterized by slowly progressive weakness and wasting of both proximal muscles (located on or close to the torso) and distal muscles (close to ...
Various patterns of muscle weakness occur in different motor neuron diseases. [6] Weakness can be symmetric or asymmetric, and it can occur in body parts that are distal, proximal, or both. According to Statland et al., there are three main weakness patterns that are seen in motor neuron diseases, which are: [6] [9]
Mexiletine, carbamazepine, tricyclic antidepressants, nonsteroidal anti inflammatory drugs [2] Frequency. >1 in 8,000 people [1] Myotonic dystrophy (DM) is a type of muscular dystrophy, a group of genetic disorders that cause progressive muscle loss and weakness. [1] In DM, muscles are often unable to relax after contraction. [1]
A weakness of the tibialis anterior muscle, which lifts the feet, is usually accompanied by an atrophy of the gastrocnemius muscle which, together with the soleus muscle, forms the triceps surae muscles (distal calf muscles), occurs causing the known "stork leg deformity". [51]
Spinal muscular atrophy (SMA) is a rare neuromuscular disorder that results in the loss of motor neurons and progressive muscle wasting. [ 3 ][ 4 ][ 5 ] It is usually diagnosed in infancy or early childhood and if left untreated it is the most common genetic cause of infant death. [ 6 ] It may also appear later in life and then have a milder ...