Christoffer Hatlestad-Hall

• Tveitstøl, Thomas; Tveter, Mats; Pérez Teseyra, Ana Silvina; Hatlestad-Hall, Christoffer; Yazidi, Anis & Hammer, Hugo Lewi [Show all 7 contributors for this article] (2023). Introducing Region Based Pooling for handling a varied number of EEG channels for deep learning models. Frontiers in Neuroinformatics. ISSN 1662-5196. 17. doi: 10.3389/fninf.2023.1272791. Full text in Research Archive
• Hatlestad-Hall, Christoffer; Bruña, Ricardo; Liljeström, Mia; Renvall, Hanna; Heuser, Kjell & Taubøll, Erik [Show all 8 contributors for this article] (2023). Reliable evaluation of functional connectivity and graph theory measures in source-level EEG: How many electrodes are enough? Clinical Neurophysiology. ISSN 1388-2457. 150, p. 1–16. doi: 10.1016/j.clinph.2023.03.002. Full text in Research Archive
• Hatlestad-Hall, Christoffer; Rygvold, Trine Waage & Andersson, Stein (2022). BIDS-structured resting-state electroencephalography (EEG) data extracted from an experimental paradigm. Data in Brief. ISSN 2352-3409. 45. doi: 10.1016/j.dib.2022.108647.
• Rygvold, Trine Waage; Hatlestad-Hall, Christoffer; Elvsåshagen, Torbjørn; Moberget, Torgeir & Andersson, Stein (2022). Long term potentiation-like neural plasticity and performance-based memory function. Neurobiology of Learning and Memory. ISSN 1074-7427. 196. doi: 10.1016/j.nlm.2022.107696.
• Rygvold, Trine Waage; Hatlestad-Hall, Christoffer; Elvsåshagen, Torbjørn; Moberget, Torgeir & Andersson, Stein (2022). Long-Term Potentiation-Like Visual Synaptic Plasticity Is Negatively Associated With Self-Reported Symptoms of Depression and Stress in Healthy Adults. Frontiers in Human Neuroscience. ISSN 1662-5161. 16. doi: 10.3389/fnhum.2022.867675.
• Lengali, Lilly; Hippe, Johannes; Hatlestad-Hall, Christoffer; Rygvold, Trine Waage; Sneve, Markus Handal & Andersson, Stein (2021). Sensory-Induced Human LTP-Like Synaptic Plasticity – Using Visual Evoked Potentials to Explore the Relation Between LTP-Like Synaptic Plasticity and Visual Perceptual Learning. Frontiers in Human Neuroscience. ISSN 1662-5161. 15. doi: 10.3389/fnhum.2021.684573.
• Valstad, Mathias; Roelfs, Daniel; Slapø, Nora Berz; Timpe, Clara Marie Fides; Rai, Ahsan & Matziorinis, Anna Maria [Show all 24 contributors for this article] (2021). Evidence for Reduced Long-Term Potentiation-Like Visual Cortical Plasticity in Schizophrenia and Bipolar Disorder. Schizophrenia Bulletin. ISSN 0586-7614. 47(6), p. 1751–1760. doi: 10.1093/schbul/sbab049. Full text in Research Archive
• Hatlestad-Hall, Christoffer; Bruña, Ricardo; Erichsen, Erik Aksel Spendrup; Andersson, Vebjørn; Syvertsen, Marte Roa & Skogan, Annette Holth [Show all 13 contributors for this article] (2021). The organization of functional neurocognitive networks in focal epilepsy correlates with domain-specific cognitive performance. Journal of Neuroscience Research. ISSN 0360-4012. 99(10), p. 2669–2687. doi: 10.1002/jnr.24896. Full text in Research Archive
• Hatlestad-Hall, Christoffer; Bruña, Ricardo; Syvertsen, Marte Roa; Erichsen, Erik Aksel Spendrup; Andersson, Vebjørn & Vecchio, Fabrizio [Show all 12 contributors for this article] (2021). Source-level EEG and graph theory reveal widespread functional network alterations in focal epilepsy. Clinical Neurophysiology. ISSN 1388-2457. 132(7), p. 1663–1676. doi: 10.1016/j.clinph.2021.04.008. Full text in Research Archive
• Valstad, Mathias; Moberget, Torgeir; Roelfs, Daniël Thomas Heimen; Slapø, Nora Berz; Timpe, Clara Marie Fides & Beck, Dani [Show all 18 contributors for this article] (2020). Experience-dependent modulation of the visual evoked potential: Testing effect sizes, retention over time, and associations with age in 415 healthy individuals. NeuroImage. ISSN 1053-8119. doi: 10.1016/j.neuroimage.2020.117302. Full text in Research Archive
• Rygvold, Trine Waage; Hatlestad-Hall, Christoffer; Elvsåshagen, Torbjørn; Moberget, Torgeir & Andersson, Stein (2020). Do visual and auditory stimulus-specific response modulation reflect different mechanisms of neocortical plasticity? European Journal of Neuroscience. ISSN 0953-816X. p. 1–14. doi: 10.1111/ejn.14964. Full text in Research Archive
• Granerud-Dunvoll, Guro; Arntzen, Erik; Elvsåshagen, Torbjørn; Hatlestad, Christoffer & Malt, Eva Albertsen (2019). Equivalence Class Formation and the N400: Methodological Issues. The Psychological Record. ISSN 0033-2933. 69(2), p. 175–191. doi: 10.1007/s40732-019-00332-x.

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• Haraldsen, Ira Hebold; Hatlestad-Hall, Christoffer; Marra, Camillo; Renvall, Hanna; Maestú, Fernando & Acosta-Hernández, Jorge [Show all 69 contributors for this article] (2023). Intelligent digital tools for screening of brain connectivity and dementia risk estimation in people affected by mild cognitive impairment: the AI-Mind clinical study protocol. Frontiers in Neurorobotics. 17. doi: 10.3389/fnbot.2023.1289406. Full text in Research Archive Show summary

  More than 10 million Europeans show signs of mild cognitive impairment (MCI), a transitional stage between normal brain aging and dementia stage memory disorder. The path MCI takes can be divergent; while some maintain stability or even revert to cognitive norms, alarmingly, up to half of the cases progress to dementia within 5 years. Current diagnostic practice lacks the necessary screening tools to identify those at risk of progression. The European patient experience often involves a long journey from the initial signs of MCI to the eventual diagnosis of dementia. The trajectory is far from ideal. Here, we introduce the AI-Mind project, a pioneering initiative with an innovative approach to early risk assessment through the implementation of advanced artificial intelligence (AI) on multimodal data. The cutting-edge AI-based tools developed in the project aim not only to accelerate the diagnostic process but also to deliver highly accurate predictions regarding an individual’s risk of developing dementia when prevention and intervention may still be possible. AI-Mind is a European Research and Innovation Action (RIA H2020-SC1-BHC-06-2020, No. 964220) financed between 2021 and 2026. First, the AI-Mind Connector identifies dysfunctional brain networks based on high-density magneto- and electroencephalography (M/EEG) recordings. Second, the AI-Mind Predictor predicts dementia risk using data from the Connector, enriched with computerized cognitive tests, genetic and protein biomarkers, as well as sociodemographic and clinical variables. AIMind is integrated within a network of major European initiatives, including The Virtual Brain, The Virtual Epileptic Patient, and EBRAINS AISBL service for sensitive data, HealthDataCloud, where big patient data are generated for advancing digital and virtual twin technology development. AI-Mind’s innovation lies not only in its early prediction of dementia risk, but it also enables a virtual laboratory scenario for hypothesis-driven personalized intervention research. This article introduces the background of the AI-Mind project and its clinical study protocol, setting the stage for future scientific contribution.

• Granerud, Guro; Arntzen, Erik; Elvsåshagen, Torbjørn; Hatlestad-Hall, Christoffer & Malt, Eva Albertsen (2023). Equivalence Class Formation and Priming in Participants with High Functioning Autism.
• Granerud, Guro; Arntzen, Erik; Elvsåshagen, Torbjørn; Hatlestad-Hall, Christoffer & Malt, Eva Albertsen (2022). Høytfungerende autisme, stimulusekvivalens og priming med bilder og ord.
• Granerud, Guro; Arntzen, Erik; Elvsåshagen, Torbjørn; Hatlestad-Hall, Christoffer & Malt, Eva Albertsen (2022). High functioning autism, equivalence class formation and priming with meaningful stimuli and words.
• Granerud, Guro; Arntzen, Erik; Elvsåshagen, Torbjørn; Hatlestad-Hall, Christoffer & Malt, Eva Albertsen (2021). Updated Results on the Project “N400 in Participants with High Function Autism. Show summary

  The event-related-potential observed 400 ms after presentation of unrelated stimulus pair compared with related is called N400. When comparing N400 in participants with autism, some experiments have demonstrated the N400, and some have not. In the current experiment, one group of adults without ASD and one group of adults with high function autism were trained on six conditional discriminations with C-stimuli as meaningful stimuli. They all conducted a priming procedure with unrelated stimuli pairs and stimulus pair related through symmetry and transitivity/equivalence

• Granerud, Guro; Arntzen, Erik; Elvsåshagen, Torbjørn; Hatlestad-Hall, Christoffer & Malt, Eva Albertsen (2021). Equivalence Class Formation, N400 and Autism Spectrum. Show summary

  Equivalence class formation is reflected in the electrophysiological (EEG) component N400, research has demonstrated. Stimuli pair related through symmetry and transitivity/equivalence do not produce a N400 ms after stimuli presentation while unrelated do. In the current experiment, 24 adults with high function autism and 28 normally developed adults participated. 6 conditional discriminations with C-stimuli as meaningful where trained before a priming test, conducted with EEG-measures. Related and unrelated stimuli pairs were presented and the participant was instructed to response to the pairs, related or unrelated. The results show that the unrelated pairs produced N400 and related pair did not. This was the matter in both groups, but the N400 peak was slightly smaller in the group with Autism spectrum disorder. The conclusion is that unrelated stimuli pair produced a change in the N400 component compared with stimuli pair related through symmetry and transitivity/equivalence in both groups

• Granerud, Guro; Arntzen, Erik; Elvsåshagen, Torbjørn; Hatlestad-Hall, Christoffer & Malt, Eva Albertsen (2020). N400 Compared Between Adults With and Without High Functioning Autism. Show summary

  The N400 is an event-related brain potential sensitive to the semantic relations in naturally occurring language. To illustrate, when words are semantically related (e.g., butter-bread) the N400 will be more negative than N400 evoked by unrelated words (e.g., grease-bread). The the peak amplitudes can be used to differentiate the types of experimentally-defined stimulus relations established by Matching-to-Sample (MTS) procedures. That is, the N400 will be more negative for the “non-equivalent” than to the “equivalent” stimulus-stimulus relations. Research reported here concerns the impact of MTS training parameters, specifically, the explicit training of name-object relations, in the N400 waveforms.In this regard, a between groups design was used, in which both groups were exposed to the same experimental procedures, except for the stimuli used, so that Group 1 used only abstract figures, and Group 2 used both pseudowords and abstract figures, during MTS training. Waverforms obtained from participants shows a clear N400 effect for Group 2, but not for Group 1. These results are discussed considering the possibility that this effect reflects a difference between groups in the degree of relatedness between stimuli in equivalence classes.

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