Applause sign: is it really specific for Parkinsonian disorders? Evidence from cortical dementias.


OBJECTIVE The applause sign, originally reported as a specific sign of progressive supranuclear palsy (PSP), has recently been found in several parkinsonian disorders. Its nature is still uncertain. It has been interpreted as a motor perseveration or a form of apraxia. The present study aims to: (a) verify the specificity of the applause sign for… (More)
DOI: 10.1136/jnnp.2010.224394