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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] Other manifestations may include cataracts, intellectual disability and heart conduction problems.
Myotonia is the defining symptom of many channelopathies (diseases of ion channel transport) such as myotonia congenita, paramyotonia congenita and myotonic dystrophy. [3] [4] Brody disease (a disease of ion pump transport) has symptoms similar to myotonia congenita, however, the delayed muscle relaxation is pseudo-myotonia as the EMG is normal ...
(G71.0) Dystrophies (or muscular dystrophies) are a subgroup of myopathies characterized by muscle degeneration and regeneration. Clinically, muscular dystrophies are typically progressive, because the muscles' ability to regenerate is eventually lost, leading to progressive weakness, often leading to use of a wheelchair, and eventually death, usually related to respiratory weakness.
The cardiac problems that occur with Emery–Dreifuss muscular dystrophy (EDMD) and myotonic muscular dystrophy may require a pacemaker. [29] The myotonia (delayed relaxation of a muscle after a strong contraction) occurring in myotonic muscular dystrophy may be treated with medications such as quinine. [30]
Myotonia congenita is a congenital neuromuscular channelopathy that affects skeletal muscles (muscles used for movement). It is a genetic disorder.The hallmark of the disease is the failure of initiated contraction to terminate, often referred to as delayed relaxation of the muscles and rigidity. [1]
limb-girdle muscular dystrophy type 2B. [9] Distal myopathy with anterior tibial onset (DMAT) [10] [11] 606768: DMAT can be considered a variant of Miyoshi. Early adult-onset type 3 [4] Laing (Gower) AD [5] 160500: MYH7 [5] 14q11.2 AD = autosomal dominant; AR = autosomal recessive
When it comes to muscular diseases, most of us have heard of especially common ones like muscular dystrophy and Lou Gehrig's disease. But one of the rarest muscular disorders is also one of the ...
Bethlem myopathy is predominantly an autosomal dominant myopathy, classified as a congenital form of limb-girdle muscular dystrophy. [2] There are two types of Bethlem myopathy, based on which type of collagen is affected. [3] Bethlem myopathy 1 (BTHLM1) is caused by a mutation in one of the three genes coding for type VI collagen.