A clinical 3D pointing test differentiates spatial memory deficits in dementia and bilateral vestibular failure.

"Declarations Ethics approval and consent to participateThe data protection clearance and Institutional Review Board of the Ludwig-Maximilians-University, Munich, Germany approved the study (no. 094 − 10), and all patients gave informed consent. The study was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Consent for publicationNo protected health information (PHI) or other characteristics that allow patient identification are included in this work. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding Open Access funding enabled and organized by Projekt DEAL. The present study was supported by the Hertie Foundation to TB, and by the Deutsche Stiftung Neurologie (DSN; project 80766113) and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany‘s Excellence Strategy (Munich Cluster for Systems Neurology: EXC 2145 SyNergy) to MD."