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It is mostly reported by patients with neurodegenerative disorders such as Alzheimer's disease, dementia with Lewy bodies or Parkinson's disease (PD). Presence hallucination (PH) is frequent in neurodegenerative disease, shares several aspects with PB, and is the sensation that someone is nearby, behind or next to the patient (when nobody is actually there). Recent work developed a sensorimotor method to robotically induce PH (robot\u2010induced PH, riPH) and demonstrated that a subgroup of PD patients showed abnormal sensitivity for riPH.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>We investigated if PD patients with PB (PD\u2010PB) would (1) show elevated sensitivity for riPH that (2) is comparable to that of patients reporting PH, but not PB (PD\u2010PH).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We studied the sensitivity of non\u2010demented PD patients in a sensorimotor stimulation paradigm, during which three groups of patients (PD\u2010PB; PD\u2010PH; PD patients without hallucinations, PD\u2010nPH) were exposed to different conditions of conflicting sensorimotor stimulation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>We show that PD\u2010PB and PD\u2010PH groups had a higher sensitivity to riPH (compared to PD\u2010nPH). PD\u2010PB and PD\u2010PH groups did not differ in riPH sensitivity. Together with interview data, these behavioral data on riPH show that PB is associated with PH, suggesting that both share some underlying brain mechanisms, although interview data also revealed phenomenological differences.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Because PD\u2010PB patients did not suffer from dementia nor delusions, we argue that these shared mechanisms are of perceptual\u2010hallucinatory nature, involving sensorimotor signals and their integration.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mdc3.13684","type":"journal-article","created":{"date-parts":[[2023,2,6]],"date-time":"2023-02-06T07:33:57Z","timestamp":1675668837000},"page":"617-624","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Phantom Boarder Relates to Experimentally\u2010Induced Presence Hallucinations in Parkinson's Disease"],"prefix":"10.1002","volume":"10","author":[{"given":"Olaf","family":"Blanke","sequence":"first","affiliation":[{"name":"Laboratory of Cognitive Neuroscience, Neuro\u2010X Institute, Faculty of Life Sciences Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL)  Geneva Switzerland"},{"name":"Department of Clinical Neurosciences Geneva University Hospital  Geneva Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fosco","family":"Bernasconi","sequence":"additional","affiliation":[{"name":"Laboratory of Cognitive Neuroscience, Neuro\u2010X Institute, Faculty of Life Sciences Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL)  Geneva Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7246-3966","authenticated-orcid":false,"given":"Jevita","family":"Potheegadoo","sequence":"additional","affiliation":[{"name":"Laboratory of Cognitive Neuroscience, Neuro\u2010X Institute, Faculty of Life Sciences Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL)  Geneva Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,2,13]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1176\/ajp.141.4.580"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1479-8301.2005.00102.x"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1176\/appi.neuropsych.18080185"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1177\/0891988705277538"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.3389\/fphar.2019.01062"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/gps.389"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1097\/JGP.0b013e3180cc1fdf"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0447.1995.tb09544.x"},{"issue":"76","key":"e_1_2_8_10_1","first-page":"92","article-title":"Psychiatric phenomena in Alzheimer's disease. 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