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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 ]
Molecular look into spinal muscular atrophy. Molecular genetic testing is the tool used to assess SMA. However, this test might not be needed if signs such as hypotonia are present. MRI scans and muscle biopsies used to be the standard testing method, but molecular testing is much more efficient.
Autosomal recessive proximal spinal muscular atrophy, responsible for 90-95% of cases and usually called simply spinal muscular atrophy (SMA) – a disorder associated with a genetic mutation on the SMN1 gene on chromosome 5q (locus 5q13), diagnosed predominantly in young children and in its most severe form being the most common genetic cause ...
Jokela type spinal muscular atrophy (SMAJ), also known as late-onset spinal motor neuronopathy (LOSMoN), is an ultra-rare neuromuscular disorder characterized by muscle twitches and cramps. [1] The symptoms appear in adulthood and gradually progress.
Distal spinal muscular atrophy type 1 (DSMA1), also known as spinal muscular atrophy with respiratory distress type 1 (SMARD1), is a rare neuromuscular disorder involving death of motor neurons in the spinal cord which leads to a generalised progressive atrophy of body muscles.
Spinal muscular atrophy with lower extremity predominance 2A (SMALED2A) is a rare neuromuscular disorder characterised by muscle weakness predominantly in legs.The disorder is usually diagnosed shortly after birth; affected children have a delayed motor development, waddling gait, difficulties walking, sometimes develop spasticity.
The drug is used to treat spinal muscular atrophy associated with a mutation in the SMN1 gene. It is administered directly to the central nervous system (CNS) using intrathecal injection. [4] In clinical trials, the drug halted the disease progression. In around 60% of infants affected by type 1 spinal muscular atrophy, it improves motor ...
Spinal muscular atrophy with progressive myoclonic epilepsy (SMA-PME), sometimes called Jankovic–Rivera syndrome, is a very rare neurodegenerative disease whose symptoms include slowly progressive muscle loss (), predominantly affecting proximal muscles, combined with denervation and myoclonic seizures. [1]
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