A-Z of Neurological Conditions

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Name

Spinal Muscular Atrophy (SMA)

Related to/Also known as

Hereditary Motor Neuropathy

Description

Spinal Muscular Atrophies are a group of inherited neuromuscular conditions. The anterior horn cells of the spinal cord degenerate, resulting in weakness of the muscles. Usually the legs are more affected than the arms.

Types

Type I - Infantile SMA (also known as Werdnig-Hoffman disease) has an age of onset before 6 months and is the most severe type.

Type II - Intermediate SMA

Type III - Mild SMA, onset from 4 to 24 years.

Adult onset SMA - affects the lower motor neurones, severity of effects depends on the muscles affected.

Useful National contacts

Jennifer Trust for Spinal Muscular Atrophy
Helpline: 0800 975 3100
www.jtsma.org.uk

Our resources

The library at Neurosupport has a range of reference resources on this condition and on a wide range of disability related issues.

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