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Hypotonia

What are the causes?

In some children the hypotonia might be the manifestation of an underlying more complex condition, such as the chromosomal disorder Prader-Willi syndrome. In other children it might be a sign related to a form of cerebral palsy in which hypotonia is associated with reduced or abnormal movements. In other cases a neuromuscular disorder, i.e. a condition affecting muscles or the way muscles are activated by nerves, has to be suspected such as spinal muscular atrophy or a congenital myopathy. The long term prognosis in these latter cases is usually more severe compared to those cases with benign hypermobility syndrome especially if the breathing and feeding muscles are significantly affected.

The underlying problem is therefore significantly different in different children and this does affect the long term prognosis.

View What are the symptoms? What are the symptoms?  |  How is it diagnosed? View How is it diagnosed?

Medical text written October 2002 by Professor F Muntoni. Last updated September 2007 by Professor F Muntoni, Professor and Consultant in Paediatric Neurology, Imperial College of Science, Technology and Medicine, Hammersmith Hospital, Neuromuscular Centre, London, UK.

 

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