• Actigraphic registration of motor activity reveals a more structured behavioural pattern in schizophrenia than in major depression 

      Berle, Jan Øystein; Hauge, Erik R.; Ødegaard, Ketil Joachim; Holsten, Fred; Fasmer, Ole Bernt (Peer reviewed; Journal article, 2010-05-27)
      Background: Disturbances in motor activity pattern are seen in both schizophrenia and depression. However, this activity has rarely been studied objectively. The purpose of the present study has been to study the complexity ...
    • Adult attention deficit hyperactivity disorder is associated with asthma 

      Fasmer, Ole Bernt; Halmøy, Anne; Eagan, Tomas Mikal; Ødegaard, Ketil Joachim; Haavik, Jan (Peer reviewed; Journal article, 2011-08-07)
      Background: Attention deficit hyperactivity disorder (ADHD) is increasingly recognized as a common disorder not only in children, but also in the adult population. Similarly, asthma also has a substantial prevalence among ...
    • Adult attention deficit hyperactivity disorder is associated with migraine headaches 

      Fasmer, Ole Bernt; Halmøy, Anne; Ødegaard, Ketil Joachim; Haavik, Jan (Peer reviewed; Journal article, 2011-03-11)
      Attention deficit hyperactivity disorder (ADHD) is now recognized as a common disorder both in child and adult psychiatry. Adult patients with a diagnosis of ADHD (n = 572) and community controls (n = 675) responded to ...
    • Anterior cingulate gamma-aminobutyric acid concentrations and electroconvulsive therapy 

      Erchinger, Vera Jane; Miller, Jeremy; Jones, Thomas; Kessler, Ute; Bustillo, Juan R.; Haavik, Jan; Petrillo, Jonathan; Ziomek, Gregory; Hammar, Åsa; Ødegaard, Ketil Joachim; Calhoun, Vince D.; McClintock, Shawn M.; Ersland, Lars; Oltedal, Leif; Abbott, Christopher (Journal article; Peer reviewed, 2020-09-17)
      Objective The anticonvulsant hypothesis posits that ECT’s mechanism of action is related to enhancement of endogenous anticonvulsant brain mechanisms. Results of prior studies investigating the role of the inhibitory ...
    • Applying machine learning in motor activity time series of depressed bipolar and unipolar patients compared to healthy controls 

      Jakobsen, Petter; Garcia-Ceja, Enrique; Riegler, Michael; Stabell, Lena Antonsen; Nordgreen, Tine; Tørresen, Jim; Fasmer, Ole Bernt; Ødegaard, Ketil Joachim (Journal article; Peer reviewed, 2020)
      Current practice of assessing mood episodes in affective disorders largely depends on subjective observations combined with semi-structured clinical rating scales. Motor activity is an objective observation of the inner ...
    • Bipolar multiplex families have an increased burden of common risk variants for psychiatric disorders 

      Andlauer, Till F.M.; Guzman-Parra, José; Streit, Fabian; Strohmaier, Jana; González, Maria José; Flores, Susana Gil; Fabeiro, Francisco J. Cabaleiro; Noriega, Francisco del Río; Perez, Fermin Perez; González, Jesus Haro; Diaz, Guillermo Orozco; Diego-Otero, Yolanda de; Moreno-Küstner, Berta; Auburger, Georg; Degenhardt, Franziska; Heilmann-Heimbach, Stefanie; Herms, Stefan; Hoffmann, Per; Frank, Josef; Foo, Jerome C.; Treutlein, Jens; Witt, Stephanie H.; Cichon, Sven; Kogevinas, Manolis; Bøen, Erlend; Dale, Anders M.; Djurovic, Srdjan; Elvsåshagen, Torbjørn; Reinbold, Céline Sonja; Smeland, Olav Bjerkehagen; Agartz, Ingrid; Melle, Ingrid; Ødegaard, Ketil Joachim; Stordal, Eystein; Andreassen, Ole; Rivas, Fabio; Mayoral, Fermín; Müller-Myhsok, Bertram; Forstner, Andreas J.; Nöthen, Markus M.; Rietschel, Marcella; Stahl, Eli A.; Breen, Gerome; McQuillin, Andrew; Ripke, Stephan; Trubetskoy, Vassily; Mattheisen, Manuel; Wang, Yunpeng; Morken, Gunnar; Vaaler, Arne (Journal article; Peer reviewed, 2021)
      Multiplex families with a high prevalence of a psychiatric disorder are often examined to identify rare genetic variants with large effect sizes. In the present study, we analysed whether the risk for bipolar disorder (BD) ...
    • Brain changes induced by electroconvulsive therapy are broadly distributed 

      Ousdal, Olga Therese; Argyelan, Miklos; Narr, Katherine L.; Abbott, Christopher; Wade, Benjamin; Vandenbulcke, Mathieu; Urretavizcaya, Mikel; Tendolkar, Indira; Takamiya, Akihiro; Stek, Max L.; Soriano-Mas, Carles; Redlich, Ronny; Paulson, Olaf B.; Oudega, Mardien L.; Opel, Nils; Nordanskog, Pia; Kishimoto, Taishiro; Kämpe, Robin; Jørgensen, Anders; Hanson, Lars G.; Hamilton, J. Paul; Espinoza, Randall; Emsell, Louise; van Eijndhoven, Philip; Dols, Annemieke; Dannlowski, Udo; Cardoner, Narcis; Bouckaert, Filip; Anand, Amit; Bartsch, Hauke; Kessler, Ute; Ødegaard, Ketil Joachim; Dale, Anders; Oltedal, Leif (Peer reviewed; Journal article, 2020-03-01)
      Background Electroconvulsive therapy (ECT) is associated with volumetric enlargements of corticolimbic brain regions. However, the pattern of whole-brain structural alterations following ECT remains unresolved. Here, we ...
    • Chronotype and cellular circadian rhythms predict the clinical response to lithium maintenance treatment in patients with bipolar disorder 

      McCarthy, Michael J.; Stautland, Andrea; Jakobsen, Petter; Ødegaard, Ketil Joachim; Andreassen, Ole Andreas; Djurovic, Srdjan; Morken, Gunnar; Schøyen, Helle Kristine; McInnis, Melvin G.; Alda, Martin; Gage, Fred H.; Calabrese, Joseph R.; Zandi, Peter P.; Nievergelt, Caroline M.; Shilling, Paul D.; Kelsoe, John R. (Peer reviewed; Journal article, 2019)
      Bipolar disorder (BD) is a serious mood disorder associated with circadian rhythm abnormalities. Risk for BD is genetically encoded and overlaps with systems that maintain circadian rhythms. Lithium is an effective mood ...
    • Clinical predictors of non-response to lithium treatment in the Pharmacogenomics of Bipolar Disorder (PGBD) study 

      Lin, Yan; Maihofer, Adam X.; Stapp, Emma; Ritchey, Megan; Alliey-Rodriguez, Ney; Anand, Amit; Balaraman, Yokesh; Berrettini, Wade H; Bertram, Holli; Bhattacharjee, Abesh; Calkin, Cynthia V.; Conroy, Carla; Coryell, William; D´Arcangelo, Nicole; DeModena, Anna; Biernacka, Joanna M.; Fisher, Carrie; Frazier, Nicole; Frye, Mark; Gao, Keming; Garnham, Julie; Gershon, Elliot; Glazer, Kara; Goes, Fernando S; Goto, Toyomi; Karberg, Elizabeth; Harrington, Gloria J.; Jakobsen, Petter; Kamali, Masoud; Kelly, Marisa; Leckband, Susan G.; Lohoff, Falk W.; Stautland, Andrea; McCarthy, Michael J.; McInnis, Melvin G.; Mondimore, Francis; Morken, Gunnar; Nurnberger, John I.; Ødegaard, Ketil Joachim; Syrstad, Vigdis Elin Giæver; Ryan, Kelly; Schinagle, Martha; Schøyen, Helle Kristine; Andreassen, Ole; Shaw, Martha; Shilling, Paul D.; Slaney, Claire; Tarwater, Bruce; Calabrese, Joseph R.; Alda, Martin; Nievergelt, Caroline M.; Zandi, Peter P.; Kelsoe, John R. (Journal article; Peer reviewed, 2021)
      Background Lithium is regarded as a first-line treatment for bipolar disorder (BD), but partial response and non-response commonly occurs. There exists a need to identify lithium non-responders prior to initiating treatment. ...
    • Complexity and variability analyses of motor activity distinguish mood states in Bipolar Disorder 

      Jakobsen, Petter; Stautland, Andrea; Riegler, Michael; Côté-Allard, Ulysse Teller Masao; Sepasdar, Zahra; Nordgreen, Tine; Tørresen, Jim; Fasmer, Ole Bernt; Ødegaard, Ketil Joachim (Journal article; Peer reviewed, 2022)
      Changes in motor activity are core symptoms of mood episodes in bipolar disorder. The manic state is characterized by increased variance, augmented complexity and irregular circadian rhythmicity when compared to healthy ...
    • Cyclothymic temperament: Associations with ADHD, other psychopathology, and medical morbidity in the general population 

      Syrstad, Vigdis Elin Giæver; Ødegaard, Ketil Joachim; Fasmer, Ole Bernt; Halmøy, Anne; Haavik, Jan; Dilsaver, Stephen C.; Gjestad, Rolf (Peer reviewed; Journal article, 2020)
      Background: Cyclothymic temperament (CT) is an affective disposition often preceding bipolar disorder (BD), and is the most common affective temperament in patients with BD. In depressed patients, CT is a predictor for ...
    • Dissecting the shared genetic basis of migraine and mental disorders using novel statistical tools 

      Bahrami, Shahram; Hindley, Guy Frederick Lanyon; Winsvold, Bendik K S; O'Connell, Kevin S; Frei, Oleksandr; Shadrin, Alexey; Cheng, Weiqiu; Bettella, Francesco; Rødevand, Linn; Ødegaard, Ketil Joachim; Fan, Chun C; Pirinen, Matti J; Hautakangas, Heidi M; Martinsen, Amy; Skogholt, Anne Heidi; Brumpton, Ben Michael; Willer, Cristen J; Tronvik, Erling Andreas; Kristoffersen, Espen Saxhaug; Zwart, John Anker Henrik; Nielsen, Jonas Bille; Hagen, Knut; Nilsen, Kristian Bernhard; Hveem, Kristian; Stovner, Lars Jacob; Fritsche, Lars; Thomas, Laurent; Pedersen, Linda Margareth; Gabrielsen, Maiken Elvestad; Johnsen, Marianne Bakke; Lie, Marie; Holmen, Oddgeir Lingaas; Børte, Sigrid; Stensland, Synne; Zhou, Wei; Dale, Anders; Djurovic, Srdjan; Smeland, Olav Bjerkehagen; Andreassen, Ole (Journal article; Peer reviewed, 2022)
      Migraine is three times more prevalent in people with bipolar disorder or depression. The relationship between schizophrenia and migraine is less certain although glutamatergic and serotonergic neurotransmission are ...
    • Diurnal variation of motor activity in adult ADHD patients analyzed with methods from graph theory 

      Fasmer, Ole Bernt; Fasmer, Erlend Eindride; Mjeldheim, Kristin; Førland, Wenche; Syrstad, Vigdis Elin Giæver; Jakobsen, Petter; Berle, Jan Øystein; Henriksen, Tone Elise Gjøtterud; Sepasdar, Zahra; Hauge, Erik Rønneberg; Ødegaard, Ketil Joachim (Journal article; Peer reviewed, 2020-11)
      Attention-deficit /hyperactivity disorder (ADHD) is a common neurodevelopmental syndrome characterized by age-inappropriate levels of motor activity, impulsivity and attention. The aim of the present study was to study ...
    • The effect of electroconvulsive therapy (ECT) on serum tryptophan metabolites 

      Aarsland, Tore Ivar Malmei; Leskauskaite, Ieva; Midttun, Øivind; Ulvik, Arve; Ueland, Per Magne; Oltedal, Leif; Erchinger, Vera Jane; Ødegaard, Ketil Joachim; Haavik, Jan; Kessler, Ute (Peer reviewed; Journal article, 2019-05-31)
      Background: Prior studies suggest that activation of the tryptophan catabolism via the kynurenine pathway by proinflammatory cytokines may be involved in the pathophysiology of depression. Electroconvulsive therapy (ECT) ...
    • Effects of ECT in treatment of depression: Study protocol for a prospective neuroradiological study of acute and longitudinal effects on brain structure and function 

      Oltedal, Leif; Kessler, Ute; Ersland, Lars; Grüner, Renate; Andreassen, Ole Andreas; Haavik, Jan; Hoff, Per Ivar; Hammar, Åsa; Dale, Anders Martin; Hugdahl, Kenneth; Ødegaard, Ketil Joachim (Peer reviewed; Journal article, 2015-05-01)
      Background Major depression can be a serious and debilitating condition. For some patients in a treatment resistant depressive episode, electroconvulsive treatment (ECT) is the only treatment that is effective. Although ...
    • Elderly Patients With No Previous Psychiatric History: Suicidality and Other Factors Relating to Psychiatric Acute Admissions 

      Lund-Heimark, Hallvard; Kjelby, Eirik; Mehlum, Lars; Gjestad, Rolf; Selbæk, Geir; Kroken, Rune Andreas; Johnsen, Erik; Ødegaard, Ketil Joachim; Mellesdal, Liv Solrunn (Journal article; Peer reviewed, 2020)
      Background: The common recommendation that adults with onset of mental illness after the age of 65 should receive specialised psychogeriatric treatment is based on limited evidence. Aims: To compare factors related to ...
    • Electric field causes volumetric changes in the human brain 

      Argyelan, Miklos; Oltedal, Leif; Deng, Zhi-De; Wade, Benjamin; Bikson, Marom; Joanlanne, Andrea; Sanghani, Sohag; Bartsch, Hauke; Cano, Marta; Dale, Anders M.; Dannlowski, Udo; Dols, Annemieke; Enneking, Verena; Espinoza, Randall; Kessler, Ute; Narr, Katherine L.; Ødegaard, Ketil Joachim; Oudega, Mardien L.; Redlich, Ronny; Stek, Max L.; Takamiya, Akihiro; Emsell, Louise; Bouckaert, Filip; Sienaert, Pascal; Pujol, Jesus; Tendolkar, Indira; van Eijndhoven, Philip; Petrides, Georgios; Malhotra, Anil K.; Abbott, Christopher (Peer reviewed; Journal article, 2019)
      Recent longitudinal neuroimaging studies in patients with electroconvulsive therapy (ECT) suggest local effects of electric stimulation (lateralized) occur in tandem with global seizure activity (generalized). We used ...
    • Elevated body weight modulates subcortical volume change and associated clinical response following electroconvulsive therapy 

      Opel, Nils; Narr, Katherine L; Abbott, Christopher; Argyelan, Miklos; Espinoza, Randall; Emsell, Louise; Bouckaert, Filip; Sienaert, Pascal; Vandenbulcke, Mathieu; Nordanskog, Pia; Repple, Jonathan; Kavakbasi, Erhan; Jorgensen, Martin B.; Paulson, Olaf B.; Hanson, Lars G.; Dols, Annemieke; van Exel, Eric; Oudega, Mardien L.; Takamiya, Akihiro; Kishimoto, Taishiro; Ousdal, Olga Therese; Haavik, Jan; Hammar, Åsa Karin; Ødegaard, Ketil Joachim; Kessler, Ute; Bartsch, Hauke; Dale, Anders M.; Baune, Bernhard T; Dannlowski, Udo; Oltedal, Leif; Redlich, Ronny (Journal article; Peer reviewed, 2021)
      Background: Obesity is a frequent somatic comorbidity of major depression, and it has been associated with worse clinical outcomes and brain structural abnormalities. Converging evidence suggests that electroconvulsive ...
    • Focal adhesion is associated with lithium response in bipolar disorder: evidence from a network-based multi-omics analysis 

      Niemsiri, Vipavee; Rosenthal, Sara Brin; Nievergelt, Caroline M.; Maihofer, Adam X.; Marchetto, Maria C.; Santos, Renata; Shekhtman, Tatyana; Alliey-Rodriguez, Ney; Anand, Amit; Balaraman, Yokesh; Berrettini, Wade H.; Bertram, Holli; Burdick, Katherine E.; Calabrese, Joseph R.; Calkin, Cynthia V.; Conroy, Carla; Coryell, William H.; DeModena, Anna; Eyler, Lisa T.; Feeder, Scott; Fisher, Carrie; Frazier, Nicole; Frye, Mark A.; Gao, Keming; Garnham, Julie; Gershon, Elliot S.; Goes, Fernando S.; Goto, Toyomi; Harrington, Gloria J.; Jakobsen, Petter; Kamali, Masoud; Kelly, Marisa; Leckband, Susan G.; Lohoff, Falk W.; McCarthy, Michael J.; McInnis, Melvin G.; Craig, David; Millett, Caitlin E.; Mondimore, Francis; Morken, Gunnar; Nurnberger, John I.; Donovan, Claire O’; Ødegaard, Ketil Joachim; Ryan, Kelly; Schinagle, Martha; Shilling, Paul D.; Slaney, Claire; Stapp, Emma K.; Stautland, Andrea; Tarwater, Bruce; Zandi, Peter P.; Alda, Martin; Fisch, Kathleen M.; Gage, Fred H.; Kelsoe, John R. (Journal article; Peer reviewed, 2023)
      Lithium (Li) is one of the most effective drugs for treating bipolar disorder (BD), however, there is presently no way to predict response to guide treatment. The aim of this study is to identify functional genes and ...
    • Genome wide association study identifies variants in NBEA associated with migraine in bipolar disorder 

      Jacobsen, Kaya Kvarme; Nievergelt, Caroline M.; Zayats, Tetyana; Greenwood, Tifany A.; Anttila, Verneri; Akiskal, Hagop Souren; Haavik, Jan; Fasmer, Ole Bernt; Kelsoe, John R.; Johansson, Stefan; Ødegaard, Ketil Joachim (Peer reviewed; Journal article, 2015-10-12)
      Background. Migraine is a common comorbidity among individuals with bipolar disorder, but the underlying mechanisms for this co-occurrence are poorly understood. The aim of this study was to investigate the genetic background ...