SMA (Spinal Muscular Atrophy): What It Is, Symptoms & Types
2024年6月6日 · Spinal muscular atrophy (SMA) is a genetic condition that causes worsening muscle weakness. There are five subtypes, which range in severity and age of onset. There’s …
Types of Spinal Muscular Atrophy (SMA) - Diseases | Muscular …
Spinal muscular atrophy (SMA) types 1 through 4 all result from a single known cause — a deficiency of a protein called SMN, which stands for "survival of motor neuron." Deficiency of …
Spinal Muscle Atrophy - StatPearls - NCBI Bookshelf
2023年7月17日 · There are four main subtypes of spinal muscular atrophy defined by the age of onset and severity with type 0 presenting in utero and causing death within the first months of …
Spinal Muscular Atrophy | National Institute of Neurological …
2024年7月30日 · Type l (also known as Werdnig-Hoffman disease or infantile-onset SMA) is the most common form of SMA. It is usually evident before 6 months of age. Symptoms include …
Spinal Muscular Atrophy (SMA): Types, Symptoms, Causes
2023年9月20日 · Spinal muscular atrophy (SMA) is a disease of the motor neurons in the spinal cord and brain stem. It is hereditary, and there are different types that are all caused by the …
Spinal Muscular Atrophy: Types of SMA - Healthline
2022年10月17日 · Though everyone with spinal muscular atrophy (SMA) has a gene mutation, the onset, symptoms, and progression vary considerably. Learn the types of SMA.
Spinal Muscular Atrophy (SMA) - Johns Hopkins Medicine
Types of SMA. Spinal muscle atrophy is classified as type 1, 2, 3 or 4 depending on age of onset. Most cases are progressive — that is, symptoms worsen instead of improving – but in general …
Types of Spinal Muscular Atrophy - WebMD
2023年5月12日 · Spinal muscular atrophy (SMA) is a disease that causes muscles in the body to get weaker and smaller. There are five types. Which one a case falls in depends on the age …
Spinal Muscular Atrophy - GeneReviews® - NCBI Bookshelf
2000年2月24日 · Spinal muscular atrophy (SMA) is characterized by muscle weakness and atrophy resulting from progressive degeneration and irreversible loss of the anterior horn cells …
Types of Spinal Muscular Atrophy (SMA) - mySMAteam
2024年9月30日 · There are five main types of SMA — types 0, 1, 2, 3, and 4 — along with a few rarer forms. These types differ based on the age at which symptoms appear, the severity of …