Publications 2025

Grimstad K, Sørensen H, Vaskinn A, Mohn C, Olsen SH, Andreassen OA, Lagerberg TV, Melle I, Øie MG, Ueland T, Haatveit B (2025)
Subjective cognition in schizophrenia and bipolar disorder: Investigation of group differences and associations with objective cognition and clinical characteristics using a novel measure of subjective cognition
Schizophr Res Cogn, 40, 100345
DOI 10.1016/j.scog.2025.100345, PubMed 39989506

Publications 2024

Barth C, Nerland S, Jørgensen KN, Haatveit B, Wortinger LA, Melle I, Haukvik UK, Ueland T, Andreassen OA, Agartz I (2024)
Altered Sex Differences in Hippocampal Subfield Volumes in Schizophrenia
Schizophr Bull, 50 (1), 107-119
DOI 10.1093/schbul/sbad091, PubMed 37354490

Mohn C, Ueland T, Haatveit B, Sæther LS, Lagerberg TV, Andreassen OA, Melle I, Vaskinn A (2024)
Neurocognitive function and delusion severity in schizophrenia spectrum disorders
Schizophr Res, 270, 172-177
DOI 10.1016/j.schres.2024.06.028, PubMed 38917554

Sæther LS, Szabo A, Akkouh IA, Haatveit B, Mohn C, Vaskinn A, Aukrust P, Ormerod MBEG, Eiel Steen N, Melle I, Djurovic S, Andreassen OA, Ueland T, Ueland T (2024)
Cognitive and inflammatory heterogeneity in severe mental illness: Translating findings from blood to brain
Brain Behav Immun, 118, 287-299
DOI 10.1016/j.bbi.2024.03.014, PubMed 38461955

Sæther LS, Ueland T, Haatveit B, Vaskinn A, Bärthel Flaaten C, Mohn C, E G Ormerod MB, Aukrust P, Melle I, Steen NE, Andreassen OA, Ueland T (2024)
Longitudinal course of inflammatory-cognitive subgroups across first treatment severe mental illness and healthy controls
Psychol Med, 54 (12), 1-11 (in press)
DOI 10.1017/S003329172400206X, PubMed 39354711

Publications 2023

Flaaten CB, Melle I, Bjella T, Engen MJ, Åsbø G, Wold KF, Widing L, Gardsjord E, Øie MG, Lyngstad SH, Haatveit B, Simonsen C, Ueland T (2023)
Long-term course of cognitive functioning in bipolar disorder: A ten-year follow-up study
Bipolar Disord, 26 (2), 136-147
DOI 10.1111/bdi.13364, PubMed 37356974

Haatveit B, Westlye LT, Vaskinn A, Flaaten CB, Mohn C, Bjella T, Sæther LS, Sundet K, Melle I, Andreassen OA, Alnæs D, Ueland T (2023)
Intra- and inter-individual cognitive variability in schizophrenia and bipolar spectrum disorder: an investigation across multiple cognitive domains
Schizophrenia (Heidelb), 9 (1), 89
DOI 10.1038/s41537-023-00414-4, PubMed 38110366

Løchen AR, Kolskår KK, de Lange AG, Sneve MH, Haatveit B, Lagerberg TV, Ueland T, Melle I, Andreassen OA, Westlye LT, Alnæs D (2023)
Visual processing deficits in patients with schizophrenia spectrum and bipolar disorders and associations with psychotic symptoms, and intellectual abilities
Heliyon, 9 (2), e13354
DOI 10.1016/j.heliyon.2023.e13354, PubMed 36825178

Widing L, Simonsen C, Bjella T, Engen MJ, Flaaten CB, Gardsjord E, Haatveit B, Haug E, Lyngstad SH, Svendsen IH, Vik RK, Wold KF, Åsbø G, Ueland T, Melle I (2023)
Long-term Outcomes of People With DSM Psychotic Disorder NOS
Schizophr Bull Open, 4 (1), sgad005
DOI 10.1093/schizbullopen/sgad005, PubMed 39145337

Publications 2022

Engen MJ, Vaskinn A, Melle I, Færden A, Lyngstad SH, Flaaten CB, Widing LH, Wold KF, Åsbø G, Haatveit B, Simonsen C, Ueland T (2022)
Cognitive and Global Functioning in Patients With First-Episode Psychosis Stratified by Level of Negative Symptoms. A 10-Year Follow-Up Study
Front Psychiatry, 13, 841057
DOI 10.3389/fpsyt.2022.841057, PubMed 35401286

Flaaten CB, Melle I, Bjella T, Engen MJ, Åsbø G, Wold KF, Widing L, Gardsjord E, Sæther LS, Øie MG, Lyngstad SH, Haatveit B, Simonsen C, Ueland T (2022)
Domain-specific cognitive course in schizophrenia: Group- and individual-level changes over 10 years
Schizophr Res Cogn, 30, 100263
DOI 10.1016/j.scog.2022.100263, PubMed 35783460

Flaaten CB, Melle I, Gardsjord E, Bjella T, Engen MJ, Vaskinn A, Åsbø G, Wold KF, Widing L, Lyngstad SH, Haatveit B, Simonsen C, Ueland T (2022)
Course of intellectual functioning in schizophrenia and bipolar disorder: a 10-year follow-up study
Psychol Med, 53 (6), 2662-2670
DOI 10.1017/S0033291721004645, PubMed 35256030

Sæther LS, Ueland T, Haatveit B, Maglanoc LA, Szabo A, Djurovic S, Aukrust P, Roelfs D, Mohn C, Ormerod MBEG, Lagerberg TV, Steen NE, Melle I, Andreassen OA, Ueland T (2022)
Inflammation and cognition in severe mental illness: patterns of covariation and subgroups
Mol Psychiatry, 28 (3), 1284-1292
DOI 10.1038/s41380-022-01924-w, PubMed 36577840

Vaskinn A, Sundet K, Haatveit B (2022)
Social cognitive heterogeneity in schizophrenia: A cluster analysis
Schizophr Res Cogn, 30, 100264
DOI 10.1016/j.scog.2022.100264, PubMed 35832256

Widing L, Simonsen C, Flaaten CB, Haatveit B, Vik RK, Wold KF, Åsbø G, Ueland T, Melle I (2022)
Premorbid characteristics of patients with DSM-IV psychotic disorders
Compr Psychiatry, 115, 152310
DOI 10.1016/j.comppsych.2022.152310, PubMed 35385814

Åsbø G, Ueland T, Haatveit B, Bjella T, Flaaten CB, Wold KF, Widing L, Engen MJ, Lyngstad SH, Gardsjord E, Romm KL, Melle I, Simonsen C (2022)
The Time is Ripe for a Consensus Definition of Clinical Recovery in First-episode Psychosis: Suggestions Based on a 10-Year Follow-up Study
Schizophr Bull, 48 (4), 839-849
DOI 10.1093/schbul/sbac035, PubMed 35419608

Publications 2021

Abé C, Ching CRK, Liberg B, Lebedev AV, Agartz I, Akudjedu TN, Alda M, Alnæs D, Alonso-Lana S, Benedetti F, Berk M, Bøen E, Bonnin CDM, Breuer F, Brosch K, Brouwer RM, Canales-Rodríguez EJ, Cannon DM, Chye Y, Dahl A, Dandash O, Dannlowski U, Dohm K, Elvsåshagen T, Fisch L et al. (2021)
Longitudinal Structural Brain Changes in Bipolar Disorder: A Multicenter Neuroimaging Study of 1232 Individuals by the ENIGMA Bipolar Disorder Working Group
Biol Psychiatry, 91 (6), 582-592
DOI 10.1016/j.biopsych.2021.09.008, PubMed 34809987

Høegh MC, Melle I, Aminoff SR, Haatveit B, Olsen SH, Huflåtten IB, Ueland T, Lagerberg TV (2021)
Characterization of affective lability across subgroups of psychosis spectrum disorders
Int J Bipolar Disord, 9 (1), 34
DOI 10.1186/s40345-021-00238-0, PubMed 34734342

Valstad M, Roelfs D, Slapø NB, Timpe CMF, Rai A, Matziorinis AM, Beck D, Richard G, Sæther LS, Haatveit B, Nordvik JE, Hatlestad-Hall C, Einevoll GT, Mäki-Marttunen T, Haram M, Ueland T, Lagerberg TV, Steen NE, Melle I, Westlye LT, Jönsson EG, Andreassen OA, Moberget T, Elvsåshagen T (2021)
Evidence for Reduced Long-Term Potentiation-Like Visual Cortical Plasticity in Schizophrenia and Bipolar Disorder
Schizophr Bull, 47 (6), 1751-1760
DOI 10.1093/schbul/sbab049, PubMed 33963856

Publications 2020

Haukvik UK, Gurholt TP, Nerland S, Elvsåshagen T, Akudjedu TN, Alda M, Alnaes D, Alonso-Lana S, Bauer J, Baune BT, Benedetti F, Berk M, Bettella F, Bøen E, Bonnín CM, Brambilla P, Canales-Rodríguez EJ, Cannon DM, Caseras X, Dandash O, Dannlowski U, Delvecchio G, Díaz-Zuluaga AM, van Erp TGM, Fatjó-Vilas M et al. (2020)
In vivo hippocampal subfield volumes in bipolar disorder-A mega-analysis from The Enhancing Neuro Imaging Genetics through Meta-Analysis Bipolar Disorder Working Group
Hum Brain Mapp, 43 (1), 385-398
DOI 10.1002/hbm.25249, PubMed 33073925

Haatveit B, Mørch-Johnsen L, Alnæs D, Engen MJ, Lyngstad SH, Færden A, Agartz I, Ueland T, Melle I (2020)
Divergent relationship between brain structure and cognitive functioning in patients with prominent negative symptomatology
Psychiatry Res Neuroimaging, 307, 111233
DOI 10.1016/j.pscychresns.2020.111233, PubMed 33340940

Kaufmann T, van der Meer D, Doan NT, Schwarz E, Lund MJ, Agartz I, Alnæs D, Barch DM, Baur-Streubel R, Bertolino A, Bettella F, Beyer MK, Bøen E, Borgwardt S, Brandt CL, Buitelaar J, Celius EG, Cervenka S, Conzelmann A, Córdova-Palomera A, Dale AM, de Quervain DJF, Di Carlo P, Djurovic S, Dørum ES et al. (2020)
Publisher Correction: Common brain disorders are associated with heritable patterns of apparent aging of the brain
Nat Neurosci, 23 (2), 295
DOI 10.1038/s41593-019-0553-6, PubMed 31848485

Lyngstad SH, Gardsjord ES, Engen MJ, Haatveit B, Ihler HM, Wedervang-Resell K, Simonsen C, Melle I, Færden A (2020)
Trajectory and early predictors of apathy development in first-episode psychosis and healthy controls: a 10-year follow-up study
Eur Arch Psychiatry Clin Neurosci, 270 (6), 709-722
DOI 10.1007/s00406-020-01112-3, PubMed 32130475

Valstad M, Moberget T, Roelfs D, Slapø NB, Timpe CMF, Beck D, Richard G, Sæther LS, Haatveit B, Skaug KA, Nordvik JE, Hatlestad-Hall C, Einevoll GT, Mäki-Marttunen T, Westlye LT, Jönsson EG, Andreassen OA, Elvsåshagen T (2020)
Experience-dependent modulation of the visual evoked potential: Testing effect sizes, retention over time, and associations with age in 415 healthy individuals
Neuroimage, 223, 117302
DOI 10.1016/j.neuroimage.2020.117302, PubMed 32828930

Vaskinn A, Haatveit B, Melle I, Andreassen OA, Ueland T, Sundet K (2020)
Cognitive Heterogeneity across Schizophrenia and Bipolar Disorder: A Cluster Analysis of Intellectual Trajectories
J Int Neuropsychol Soc, 26 (9), 860-872
DOI 10.1017/S1355617720000442, PubMed 32423506

Widing L, Simonsen C, Flaaten CB, Haatveit B, Vik RK, Wold KF, Åsbø G, Ueland T, Melle I (2020)
Symptom Profiles in Psychotic Disorder Not Otherwise Specified
Front Psychiatry, 11, 580444
DOI 10.3389/fpsyt.2020.580444, PubMed 33281644

Wierenga LM, Doucet GE, Dima D, Agartz I, Aghajani M, Akudjedu TN, Albajes-Eizagirre A, Alnaes D, Alpert KI, Andreassen OA, Anticevic A, Asherson P, Banaschewski T, Bargallo N, Baumeister S, Baur-Streubel R, Bertolino A, Bonvino A, Boomsma DI, Borgwardt S, Bourque J, den Braber A, Brandeis D, Breier A, Brodaty H et al. (2020)
Greater male than female variability in regional brain structure across the lifespan
Hum Brain Mapp, 43 (1), 470-499
DOI 10.1002/hbm.25204, PubMed 33044802

Publications 2019

Alnæs D, Kaufmann T, van der Meer D, Córdova-Palomera A, Rokicki J, Moberget T, Bettella F, Agartz I, Barch DM, Bertolino A, Brandt CL, Cervenka S, Djurovic S, Doan NT, Eisenacher S, Fatouros-Bergman H, Flyckt L, Di Giorgio A, Haatveit B, Jönsson EG, Kirsch P, Lund MJ, Meyer-Lindenberg A, Pergola G, Schwarz E et al. (2019)
Brain Heterogeneity in Schizophrenia and Its Association With Polygenic Risk
JAMA Psychiatry, 76 (7), 739-748
DOI 10.1001/jamapsychiatry.2019.0257, PubMed 30969333

Engen MJ, Simonsen C, Melle I, Færden A, Lyngstad SH, Haatveit B, Vaskinn A, Ueland T (2019)
Cognitive functioning in patients with first-episode psychosis stratified by level of negative symptoms: A 1-year follow-up study
Psychiatry Res, 281, 112554
DOI 10.1016/j.psychres.2019.112554, PubMed 31499342

Kaufmann T, van der Meer D, Doan NT, Schwarz E, Lund MJ, Agartz I, Alnæs D, Barch DM, Baur-Streubel R, Bertolino A, Bettella F, Beyer MK, Bøen E, Borgwardt S, Brandt CL, Buitelaar J, Celius EG, Cervenka S, Conzelmann A, Córdova-Palomera A, Dale AM, de Quervain DJF, Di Carlo P, Djurovic S, Dørum ES et al. (2019)
Common brain disorders are associated with heritable patterns of apparent aging of the brain
Nat Neurosci, 22 (10), 1617-1623
DOI 10.1038/s41593-019-0471-7, PubMed 31551603

Laskemoen JF, Büchmann C, Barrett EA, Collier-Høegh M, Haatveit B, Vedal TJ, Ueland T, Melle I, Aas M, Simonsen C (2019)
Do sleep disturbances contribute to cognitive impairments in schizophrenia spectrum and bipolar disorders?
Eur Arch Psychiatry Clin Neurosci, 270 (6), 749-759
DOI 10.1007/s00406-019-01075-0, PubMed 31587109

Publications 2018

van der Meer D, Rokicki J, Kaufmann T, Córdova-Palomera A, Moberget T, Alnæs D, Bettella F, Frei O, Doan NT, Sønderby IE, Smeland OB, Agartz I, Bertolino A, Bralten J, Brandt CL, Buitelaar JK, Djurovic S, van Donkelaar M, Dørum ES, Espeseth T, Faraone SV, Fernández G, Fisher SE, Franke B, Haatveit B et al. (2018)
Brain scans from 21,297 individuals reveal the genetic architecture of hippocampal subfield volumes
Mol Psychiatry, 25 (11), 3053-3065
DOI 10.1038/s41380-018-0262-7, PubMed 30279459

Publications 2017

Demmo C, Lagerberg TV, Kvitland LR, Aminoff SR, Hellvin T, Simonsen C, Haatveit B, Andreassen OA, Melle I, Ueland T (2017)
Neurocognitive functioning, clinical course and functional outcome in first-treatment bipolar I disorder patients with and without clinical relapse: A 1-year follow-up study
Bipolar Disord, 20 (3), 228-237
DOI 10.1111/bdi.12569, PubMed 29121444

Nerhus M, Berg AO, Simonsen C, Haram M, Haatveit B, Dahl SR, Gurholt TP, Bjella TD, Ueland T, Andreassen OA, Melle I (2017)
Vitamin D Deficiency Associated With Cognitive Functioning in Psychotic Disorders
J Clin Psychiatry, 78 (7), e750-e757
DOI 10.4088/JCP.16m10880, PubMed 28493652

Publications 2016

Demmo C, Lagerberg TV, Aminoff SR, Hellvin T, Kvitland LR, Simonsen C, Haatveit B, Andreassen OA, Melle I, Ueland T (2016)
Course of neurocognitive function in first treatment bipolar I disorder: One-year follow-up study
Psychiatry Res, 249, 286-292
DOI 10.1016/j.psychres.2016.12.048, PubMed 28142102

Haatveit B, Jensen J, Alnæs D, Kaufmann T, Brandt CL, Thoresen C, Andreassen OA, Melle I, Ueland T, Westlye LT (2016)
Reduced load-dependent default mode network deactivation across executive tasks in schizophrenia spectrum disorders
Neuroimage Clin, 12, 389-96
DOI 10.1016/j.nicl.2016.08.012, PubMed 27622135

Quintana DS, Elstad M, Kaufmann T, Brandt CL, Haatveit B, Haram M, Nerhus M, Westlye LT, Andreassen OA (2016)
Resting-state high-frequency heart rate variability is related to respiratory frequency in individuals with severe mental illness but not healthy controls
Sci Rep, 6, 37212
DOI 10.1038/srep37212, PubMed 27853244

Publications 2015

Bolstad I, Andreassen OA, Groote IR, Haatveit B, Server A, Jensen J (2015)
No difference in frontal cortical activity during an executive functioning task after acute doses of aripiprazole and haloperidol
Front Hum Neurosci, 9, 296
DOI 10.3389/fnhum.2015.00296, PubMed 26074803

Brandt CL, Kaufmann T, Agartz I, Hugdahl K, Jensen J, Ueland T, Haatveit B, Skatun KC, Doan NT, Melle I, Andreassen OA, Westlye LT (2015)
Cognitive Effort and Schizophrenia Modulate Large-Scale Functional Brain Connectivity
Schizophr Bull, 41 (6), 1360-9
DOI 10.1093/schbul/sbv013, PubMed 25731885

Haatveit B, Vaskinn A, Sundet KS, Jensen J, Andreassen OA, Melle I, Ueland T (2015)
Stability of executive functions in first episode psychosis: One year follow up study
Psychiatry Res, 228 (3), 475-81
DOI 10.1016/j.psychres.2015.05.060, PubMed 26165960

Quintana DS, Westlye LT, Kaufmann T, Rustan ØG, Brandt CL, Haatveit B, Steen NE, Andreassen OA (2015)
Reduced heart rate variability in schizophrenia and bipolar disorder compared to healthy controls
Acta Psychiatr Scand, 133 (1), 44-52
DOI 10.1111/acps.12498, PubMed 26371411