Early hallucinations may indicate faster cognitive decline in patients with Parkinson's disease

Have you ever felt the strong sensation that someone is behind you, so intense that you turn around, only to see that no-one is there? This is a 'presence hallucination'.

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Barcelona ,Comunidad Autonoma De Cataluna ,Spain ,Danielle Ellis ,Fosco Bernasconi ,Olaf Blanke ,Laboratory Of Cognitive Neuroscience ,Nature Mental Health ,Nature Mental ,Cognitive Neuroscience ,Bertarelli Chair ,Cognitive Neuroprosthetics ,Sant Pau Hospital ,