{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:16:09Z","timestamp":1760235369979,"version":"build-2065373602"},"reference-count":153,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2021,8,23]],"date-time":"2021-08-23T00:00:00Z","timestamp":1629676800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>We explored whether two visual mental imagery experiences may be differentiated by electroencephalographic (EEG) and performance interactions with concurrent orienting external attention (OEA) to stimulus location and subsequent visuospatial detection. We measured within-subject (N = 10) event-related potential (ERP) changes during out-of-body imagery (OBI)\u2014vivid imagery of a vertical line outside of the head\/body\u2014and within-body imagery (WBI)\u2014vivid imagery of the line within one\u2019s own head. Furthermore, we measured ERP changes and line offset Vernier acuity (hyperacuity) performance concurrent with those imagery, compared to baseline detection without imagery. Relative to OEA baseline, OBI yielded larger N200 and P300, whereas WBI yielded larger P50, P100, N400, and P800. Additionally, hyperacuity dropped significantly when concurrent with both imagery types. Partial least squares analysis combined behavioural performance, ERPs, and\/or event-related EEG band power (ERBP). For both imagery types, hyperacuity reduction correlated with opposite frontal and occipital ERP amplitude and polarity changes. Furthermore, ERP modulation and ERBP synchronizations for all EEG frequencies correlated inversely with hyperacuity. Dipole Source Localization Analysis revealed unique generators in the left middle temporal gyrus (WBI) and in the right frontal middle gyrus (OBI), whereas the common generators were in the left precuneus and middle occipital cortex (cuneus). Imagery experiences, we conclude, can be identified by symmetric and asymmetric combined neurophysiological-behavioural patterns in interactions with the width of attentional focus.<\/jats:p>","DOI":"10.3390\/sym13081549","type":"journal-article","created":{"date-parts":[[2021,8,23]],"date-time":"2021-08-23T23:19:33Z","timestamp":1629760773000},"page":"1549","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Neurofunctional Symmetries and Asymmetries during Voluntary out-of- and within-Body Vivid Imagery Concurrent with Orienting Attention and Visuospatial Detection"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8295-9850","authenticated-orcid":false,"given":"Amedeo","family":"D\u2019Angiulli","sequence":"first","affiliation":[{"name":"Neuroscience of Imagination, Cognition and Emotion Research (NICER) Lab, Carleton University, Ottawa, ON KS1 5B6, Canada"},{"name":"Department of Neuroscience, Carleton University, Ottawa, ON K1S 5B6, Canada"}]},{"given":"Darren","family":"Kenney","sequence":"additional","affiliation":[{"name":"Department of Neuroscience, Carleton University, Ottawa, ON K1S 5B6, Canada"}]},{"given":"Dao Anh Thu","family":"Pham","sequence":"additional","affiliation":[{"name":"Neuroscience of Imagination, Cognition and Emotion Research (NICER) Lab, Carleton University, Ottawa, ON KS1 5B6, Canada"},{"name":"Department of Systems and Computer Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada"}]},{"given":"Etienne","family":"Lefebvre","sequence":"additional","affiliation":[{"name":"Neuroscience of Imagination, Cognition and Emotion Research (NICER) Lab, Carleton University, Ottawa, ON KS1 5B6, Canada"},{"name":"Department of Neuroscience, Carleton University, Ottawa, ON K1S 5B6, Canada"}]},{"given":"Justin","family":"Bellavance","sequence":"additional","affiliation":[{"name":"Department of Neuroscience, Carleton University, Ottawa, ON K1S 5B6, Canada"},{"name":"Department of Computer Science, Carleton University, Ottawa, ON K1S 5B6, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4478-2844","authenticated-orcid":false,"given":"Derrick Matthew","family":"Buchanan","sequence":"additional","affiliation":[{"name":"Neuroscience of Imagination, Cognition and Emotion Research (NICER) Lab, Carleton University, Ottawa, ON KS1 5B6, Canada"},{"name":"Department of Neuroscience, Carleton University, Ottawa, ON K1S 5B6, Canada"}]}],"member":"1968","published-online":{"date-parts":[[2021,8,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"466","DOI":"10.1037\/h0026771","article-title":"Concerning imagery","volume":"75","author":"Hebb","year":"1968","journal-title":"Psychol. 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