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The “ applause sign” is a simple test of motor control that helps to diffe rentiate PSP from frontal or striatofrontal degenerative diseases. It was found in 0/39 controls, 0 of 24 patients with frontotemporal dementia (FTD), 0 of 17 p atients with Parkinson disease (PD), and 30/42 patients with progressive supranu clear palsy (PSP). It discriminated PSP from FTD (p < 0.001) and PD (p < 0.00). The “ three clap test” correctly identified 81.8% of the patients in the co mparison PSP and FTD and 75% of the patients in the comparison of PSP and PD.
The “applause sign” is a simple test of motor control that helps to diffe rentiate PSP from frontal or striatofrontal degenerative diseases. It was found in 0/39 controls, 0 of 24 patients with frontotemporal dementia (FTD), 0 of 17 p atients with discriminatory PSP from FTD (p <0.001) and PD (p <0.00). The “three clap test” correctly identified 81.8% of the patients with Parkinson disease (PD), and 30 of 42 patients with progressive supranuuclear clear palsy the patients in the co mparison PSP and FTD and 75% of the patients in the comparison of PSP and PD.