On Denny-Brown’s ‘spastic dystonia’ - what is it and what causes it?

There has been considerable debate in the scientific literature in recent years regarding the proper definition of spasticity (Biering-Sorensen et al. 2006; Burridge et al. 2005; Gracies 2005a, 2005b; Lorentzen et al. 2010; Malhotra et al. 2008; Pandyan et al. 2005; Sheean 2002). Much of this debate stems from documented differences in the understanding of which clinical signs define spasticity as well as a presumed variability in the clinical use of the term (Pandyan et al.2005a; 2005b). Without a clear consensus of what we understand by ́spasticitý there is a risk that research in the field remains confused and potentially leads to misunderstandings and wrong treatment decisions in the clinic.

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