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The authors describe what happens when patients with parietal neglect are asked to clap. They clap their functioning hand against the air, stopping at the midline as if meeting the other hand there. Patients without neglect reach across the midline to clap against the paralyzed or neglected hand. The test is called the Eastchester Clapping Sign (ECS) to acknowledge that Eastchester High School students originally raised the issue in a psychology class.
The authors tested the sign in 14 patients with hemispatial neglect who were admitted to a stroke service and evaluated for acute stroke. Twelve patients tested positive for the ECS and had new right-hemisphere strokes involving the parietal lobe; one patient tested positive after bleeding int…