Employees
 

Ottesen, Akiah Astral

Researcher II
Unit: Section for Trauma, catastrophes and forced migration - children and youths
Telephone: 414 59 692

Projects

Scientific articles and chapters

2021

Hegelstad, W. t. V., Ottesen, A., Bjørnestad, J. R., Gismervik, K. N., Gismervik, K., Johannessen, J. O., Melle, I., . . . Joa, I. et al. (2021). Childhood interpersonal trauma and premorbid social adjustment as predictors of symptom remission in first episode psychosis. Schizophrenia Research, 232, 87-94. doi:10.1016/j.schres.2021.05.015

Takizawa, N., Melle, I., Barrett, E. A., Nerhus, M., & Ottesen, A. (2021). The Influence of Mental Health Literacy, Migration, and Education on the Duration of Untreated Psychosis. Frontiers In Public Health, 9, 1-9. doi:10.3389/fpubh.2021.705397

2020

Laskemoen, J. F., Aas, M., Vaskinn, A., Berg, A. O., Lunding, S. H., Barrett, E. A., . . . Simonsen, C. E. et al. (2020). Sleep disturbance mediates the link between childhood trauma and clinical outcome in severe mental disorders. Psychological Medicine, 1-10. doi:10.1017/S0033291720000914

Vaskinn, A., Melle, I., Aas, M., & Ottesen, A. (2020). Sexual abuse and physical neglect in childhood are associated with affective theory of mind in adults with schizophrenia. Schizophrenia Research: Cognition, 23. doi:10.1016/j.scog.2020.100189

2018

Berg, A. O., Jørgensen, K. N., Nerhus, M., Athanasiu, L., Popejoy, A., Bettella, F., . . . Melle, I. et al. (2018). Vitamin D levels, brain volume, and genetic architecture in patients with psychosis. PLOS ONE, 13(8). doi:10.1371/journal.pone.0200250

Bækkelund, H., Frewen, P., Lanius, R., Berg, A. O., & Arnevik, E. K.Arnevik, E. A. (2018). Trauma-related altered states of consciousness in post-traumatic stress disorder patients with or without comorbid dissociative disorders. European Journal of Psychotraumatology, 9:1544025, 1-12. doi:10.1080/20008198.2018.1544025

Gurholt, T. P., Osnes, K., Nerhus, M., Jørgensen, K. N., Lonning, V. L. H., Berg, A. O., . . . Agartz, I. et al. (2018). Vitamin D, Folate and the Intracranial Volume in Schizophrenia and Bipolar Disorder and Healthy Controls. Scientific Reports, 8. doi:10.1038/s41598-018-29141-y

Walton, E., Hibar, D., Van Erp, T. G. M., Potkin, S. G., Roiz-Santiañez, R., Crespo-Facorro, B., Suarez-Pinilla, P., van Haren, N. E., de Zwarte, S. M., Kahn, R. S., Cahn, W., Doan, N. T., Jørgensen, K. N., Gurholt, T. P., Agartz, I., Andreassen, O. A., Westlye, L. T., Melle, I., Berg, A. O., Mørch-Johnsen, L. E., Færden, A., Flyckt, L., Fatouros-Bergman, H., Jönsson, E. G., Hashimoto, R., Yamamori, H., Fukunaga, M., Jahanshad, N., De Rossi, P., Piras, F., Banaj, N., Spalletta, G., Gur, R. E., Gur, R. C., Wolf, D. H., Satterthwaite, T., Beard, L. M., Sommer, I. E., Koops, S., Gruber, O., Richter, A., Krämer, B., Kelly, S., Donohoe, G., McDonald, C., Cannon, D. M., Corvin, A., Gill, M., Di Giorgio, A., Bertolino, A., Lawrie, S. M., Nickson, T., Whalley, H. C., Neilson, E., Calhoun, V. D., Thompson, P. M., Turner, J. A., & Ehrlich, S. (2018). Prefrontal cortical thinning links to negative symptoms in schizophrenia via the ENIGMA consortium. Psychological Medicine, 48(1), 82-94. doi:10.1017/S0033291717001283

2017

Berg, A. O., Melle, I., Zuber, V., Simonsen, C. E., Nerhus, M., Ueland, T., . . . Vaskinn, A. et al. (2017). Modelling difficulties in abstract thinking in psychosis: the importance of socio-developmental background. Cognitive Neuropsychiatry, 22(1), 39-52. doi:10.1080/13546805.2016.1259998

Kaufmann, T., Alnæs, D., Brandt, C. L., Doan, N. T., Kauppi, K., Bettella, F., Lagerberg, T. V., Berg, A. O., Djurovic, S., Agartz, I., Melle, I., Ueland, T., Andreassen, O. A., & Westlye, L. T. (2017). Task modulations and clinical manifestations in the brain functional connectome in 1615 fMRI datasets. NeuroImage, 147, 243-252. doi:10.1016/j.neuroimage.2016.11.073

Nerhus, M., Berg, A. O., Simonsen, C. E., Haram, M., Haatveit, B. C., Dahl, S. R., . . . Melle, I. et al. (2017). Vitamin D deficiency associated with cognitive functioning in psychotic disorders. Journal of Clinical Psychiatry, 78(7), e750-e757. doi:10.4088/JCP.16m10880

Simonsen, C. E., Færden, A., Romm, K. L., Berg, A. O., Bjella, T., Sundet, K. S., . . . Melle, I. et al. (2017). Early clinical recovery in first-episode psychosis: Symptomatic remission and its correlates at 1-year follow-up. Psychiatry Research, 254, 118-125. doi:10.1016/j.psychres.2017.04.050

Walton, E. F., Hibar, D., Van Erp, T. G., Potkin, S. G., Roiz-Santiáñez, R., Crespo-Facorro, B., Suarez-Pinilla, P., van Haren, N. E., de Zwarte, S. M., Kahn, R. S., Cahn, W., Doan, N. T., Jørgensen, K. N., Gurholt, T. P., Agartz, I., Andreassen, O. A., Westlye, L. T., Melle, I., Berg, A. O., Mørch-Johnsen, L., Færden, A., Flyckt, L., Fatouros-Bergman, H., Jönsson, E. G., Hashimoto, R., Yamamori, H., Fukunaga, M., Preda, A., De Rossi, P., Piras, F., Banaj, N., Ciullo, V., Spalletta, G., Gur, R. E., Gur, R. C., Wolf, D. H., Satterthwaite, T. D., Beard, L. M., Sommer, I. E., Koops, S., Gruber, O., Richter, A., Krämer, B., Kelly, S., Donohoe, G. J., McDonald, C., Cannon, D. M., Corvin, A., Gill, M., Di Giorgio, A., Bertolino, A., Lawrie, S. M., Nickson, T., Whalley, H. C., Neilson, E., Calhoun, V. D., Thompson, P. M., Turner, J. A., & Ehrlich, S. (2017). Positive symptoms associate with cortical thinning in the superior temporal gyrus via the ENIGMA Schizophrenia consortium. Acta Psychiatrica Scandinavica, 135(5), 439-447. doi:10.1111/acps.12718

Østefjells, T., Lystad, J. U., Berg, A. O., Hagen, R., Loewy, R., Sandvik, L., . . . Røssberg, J. I. et al. (2017). Metacognitive beliefs mediate the effect of emotional abuse on depressive and psychotic symptoms in severe mental disorders. Psychological Medicine, 47(13), 2323-2333. doi:10.1017/S0033291717000848

2016

Nerhus, M., Berg, A. O., Kvitland, L. R., Dieset, I., Hope, S., Dahl, S. R., . . . Melle, I. et al. (2016). Low vitamin D is associated with negative and depressive symptoms in psychotic disorders. Schizophrenia Research, 178(1-3), 44-49. doi:10.1016/j.schres.2016.08.024

Aas, M., Andreassen, O. A., Aminoff, S. R., Færden, A., Romm, K. L., Nesvåg, R., Berg, A. O., Simonsen, C. E., Agartz, I., & Melle, I. (2016). A history of childhood trauma is associated with slower improvement rates: Findings from a one-year follow-up study of patients with a first-episode psychosis. BMC Psychiatry, 16. doi:10.1186/s12888-016-0827-4

2015

Berg, A. O., & Bækkelund, H. (2015). Differensialdiagnostiske vurderinger ved schizofreni og komplekse dissosiative lidelser. Tidsskrift for Norsk Psykologforening, 52(3), 247-254.

Berg, A. O., Barrett, E. A., Nerhus, M., Buchmann, C. B., Simonsen, C. E., Færden, A., . . . Melle, I. et al. (2015). Psychosis: clinical insight and beliefs in immigrants in their first episode. Early Intervention in Psychiatry, 12(2), 185-192. doi:10.1111/eip.12297

Berg, A. O., Aas, M., Larsson, S., Nerhus, M., Hauff, E., Andreassen, O. A., & Melle, I. (2015). Childhood trauma mediates the association between ethnic minority status and more severe hallucinations in psychotic disorder. Psychological Medicine, 45(01), 133-142. doi:10.1017/S0033291714001135

Nerhus, M., Berg, A. O., Dahl, S. R., Holvik, K., Gardsjord, E. S., Weibell, M. A. E., . . . Melle, I. et al. (2015). Vitamin D status in psychotic disorder patients and healthy controls – The influence of ethnic background. Psychiatry Research, 230(2), 616-621. doi:10.1016/j.psychres.2015.10.015

2014

Berg, A. O., Andreassen, O. A., Aminoff, S. R., Romm, K. L., Hauff, E., & Melle, I. (2014). The impact of immigration and visible minority status on psychosis symptom profile. Social Psychiatry and Psychiatric Epidemiology, 49(11), 1747-1757. doi:10.1007/s00127-014-0897-x

Bækkelund, H., & Berg, A. O. (2014). Kartlegging og diagnostisering av traumerelaterte lidelser. In T. L. Anstorp & K. Benum (Red.) Traumebehandling Komplekse traumelidelser og dissosiasjon (pp. 78-99). Universitetsforlaget.

2013

Aminoff, S. R., Hellvin, T., Lagerberg, T. V., Berg, A. O., Andreassen, O. A., & Melle, I. (2013). Neurocognitive features in subgroups of bipolar disorder. Bipolar Disorders, 15(3), 272-283. doi:10.1111/bdi.12061

Hope, S., Ueland, T., Steen, N. E., Dieset, I., Lorentzen, S., Berg, A. O., . . . Andreassen, O. A. et al. (2013). Interleukin 1 receptor antagonist and soluble tumor necrosis factor receptor 1 are associated with general severity and psychotic symptoms in schizophrenia and bipolar disorder. Schizophrenia Research, 145(1-3), 36-42. doi:10.1016/j.schres.2012.12.023

Nerhus, M., Berg, A. O., Haram, M., Kvitland, L. R., Andreassen, O. A., & Melle, I. (2013). Migrant background and ethnic minority status as predictors for duration of untreated psychosis. Early Intervention in Psychiatry. doi:10.1111/eip.12106

Ringen, P. A., Melle, I., Berg, A. O., Agartz, I., Spigset, O., Simonsen, C. E., . . . Andreassen, O. A. et al. (2013). Cannabis use and premorbid functioning as predictors of poorer neurocognition in schizophrenia spectrum disorder. Schizophrenia Research, 143(1), 84-89. doi:10.1016/j.schres.2012.10.021

2011

Berg, A. O., Melle, I., Røssberg, J. I., Romm, K. L., Larsson, S., Lagerberg, T. V., . . . Hauff, E. et al. (2011). Perceived discrimination is associated with severity of positive and depression/anxiety symptoms in immigrants with psychosis: a cross-sectional study. BMC Psychiatry, 11. doi:10.1186/1471-244X-11-77

Lagerberg, T. V., Sundet, K. S., Aminoff, S. R., Berg, A. O., Ringen, P. A., Andreassen, O. A., & Melle, I. (2011). Excessive cannabis use is associated with earlier age at onset in bipolar disorder. European Archives of Psychiatry and Clinical Neuroscience, 261(6), 397-405. doi:10.1007/s00406-011-0188-4

Romm, K. L., Røssberg, J. I., Berg, A. O., Hansen, C. F., Andreassen, O. A., & Melle, I. (2011). Assessment of social anxiety in first episode psychosis using the Liebowitz Social Anxiety scale as a self-report measure. European psychiatry, 26(2), 115-121. doi:10.1016/j.eurpsy.2010.08.014

Steen, N. E., Lorentzen, S., Barrett, E. A., Lagerberg, T. V., Hope, S., Larsson, S., Berg, A. O., Agartz, I., Melle, I., Berg, J. P., & Andreassen, O. A. (2011). Sex-specific cortisol levels in bipolar disorder and schizophrenia during mental challenge – Relationship to clinical characteristics and medication. Progress in Neuro-psychopharmacology and Biological Psychiatry, 35(4), 1100-1107. doi:10.1016/j.pnpbp.2011.03.008

2010

Berg, A. O., Melle, I., Torjesen, P. A., Lien, L., Hauff, E., & Andreassen, O. A. (2010). A Cross-Sectional Study of Vitamin D Deficiency Among Immigrants and Norwegians With Psychosis Compared to the General Population. Journal of Clinical Psychiatry, 71(12), 1598-1604. doi:10.4088/JCP.09m05299yel

Lagerberg, T. V., Andreassen, O. A., Ringen, P. A., Berg, A. O., Larsson, S., Agartz, I., . . . Melle, I. et al. (2010). Excessive substance use in bipolar disorder is associated with impaired functioning rather than clinical characteristics, a descriptive study. BMC Psychiatry, 10(9). doi:10.1186/1471-244X-10-9

Larsson, S., Lorentzen, S., Mork, E., Barrett, E. A., Steen, N. E., Lagerberg, T. V., Berg, A. O., Aminoff, S. R., Agartz, I., Melle, I., & Andreassen, O. A. (2010). Age at onset of bipolar disorder in a Norwegian catchment area sample. Journal of Affective Disorders, 124(1-2), 174-177. doi:10.1016/j.jad.2009.10.031

Romm, K. L., Røssberg, J. I., Berg, A. O., Barrett, E. A., Færden, A., Agartz, I., . . . Melle, I. et al. (2010). Depression and Depressive Symptoms in First Episode Psychosis. Journal of Nervous and Mental Disease, 198(1), 67-71. doi:10.1097/NMD.0b013e3181c81fc0

Books and dissertations

Ottesen, A., & Holt, K. (Red.) (2020). Kultur og kontekst i praktisk psykologarbeid. Gyldendal Norsk Forlag A/S.

Aminoff, S. R., Berg, A. O., Lagerberg, T. V., Melle, I., Simonsen, C. E., Ueland, T., & Aas, M. (2015). Psykose og Samfunn. Universitetsforlaget.

Aminoff, S. R., Lagerberg, T. V., Melle, I., Berg, A. O., Simonsen, C. E., Ueland, T., & Aas, M. (2015). Psykose og samfunn. Universitetsforlaget.

Berg, A. O. (2011). Psychosis in immigrants : a cross-sectional study of symptom profile and environmental stressors. Unipub forlag. (Series of dissertations submitted to the Faculty of Medicine, University of Oslo 1159). (Dissertation).

Reports

Berg, A. O., & Treider, M. (2014). Erfaringsrapport: Stabiliseringsgruppe for arabisktalende men, Helsesenteret for papirløse migranter. Oslo: Røde kors/Kirkens bymisjon.

Berg, A. O., & Treider, M. (2012). ErfaringsrapportStabiliseringsgruppe for etiopiske og eritreiske kvinner ved Helsesenteret for papirløse migranter i Oslo høsten 2012. Oslo: Røde kors/Kirkens bymisjon.

Other publications

2021

Ottesen, A. (2021). En sakte invasjon. Tidskrift for Norsk Psykologforening, 58(2), 129-131. doi:10.1007/s10111 014 0299 6

Ottesen, A. (2021). Kunst og Håndverk. Tidskrift for Norsk Psykologforening, 58(4), 306-307.

2020

Ottesen, A. (2020). Absurditeten i kontroll-byråkrati – eller når man går seg vill i seg selv. Tidsskrift for psykisk helsearbeid, 17, 64-67.

Ottesen, A. (2020). Det vanskelige blikket innover Kultur og kontekst – Psykologens kompetanse i praksis – Bevisstgjøring, Kunnskap og Kommunikasjon. In A. Ottesen & K. Holt (Red.) Kultur og kontekst i praktisk psykologarbeid (pp. 25-43). Gyldendal Norsk Forlag A/S.

Ottesen, A. (2020). Å gi form til røyk Om psykiatrisk diagnostikk i en krysskulturell kontekst. In A. Ottesen & K. Holt (Red.) Kultur og kontekst i praktisk psykologarbeid (pp. 122-138). Gyldendal Norsk Forlag A/S.

Ottesen, A., & Holt, K. (2020). Forord: Kultur og Kontekst i praktisk psykolog arbeid. In A. Ottesen & K. Holt (Red.) Kultur og kontekst i praktisk psykologarbeid (pp. 5-7). Gyldendal Norsk Forlag A/S.

2018

Aminoff, S. R., Henry, C., Bettella, F., Etain, B., Berg, A. O., Lagerberg, T. V., . . . Melle, I. et al. (2018 October). Affective lability and polygenic risk in bipolar disorder. Paper presented at IEPA 11th international conference on eraly intervention in mental health, Boston.

Berg, A. O., Melle, I., & Nerhus, M. (2018 September). ENVIRONAMNETAL RISK FACTORS AND SYMPTOMS IN IMMIGRANTS WITH PSYCHOTIC DISORDER. Paper presented at Foredrag og poster, Mexico City.

Gurholt, T. P., Nerhus, M., Osnes, K., Berg, A. O., Andreassen, O. A., Melle, I., & Agartz, I. (2018). Hippocampus volume reduction in psychosis spectrum could be ameliorated by vitamin D. Schizophrenia Research, 199, 433-435. doi:10.1016/j.schres.2018.03.011

2017

Gurholt, T. P., Nerhus, M., Osnes, K., Jørgensen, K. N., Berg, A. O., Andreassen, O. A., . . . Agartz, I. et al. (2017 March). Age-Related Effect of Vitamin D on Hippocampus Volume in Schizophrenia and Bipolar Disorder. Paper presented at International Congress on Schizophrenia Research, San Diego.

2015

Berg, A. O. (2015 August). Differensialdiagnostikk ved traumelidelser. Foredrag på Nasjonal ROP tjeneste, Ottestad.

Berg, A. O. (2015 February). Migrasjon og symptomprofiler ved psykoselidelser. Foredrag på PSYKISK HELSE OG RUSMIDDELFORSKNING Ubehag i kulturen eller kultur i ubehaget, Tromsø.

Berg, A. O. (2015 June). Traume, dissosiasjon og psykose i et transkulturelt perspektiv. Foredrag på Trauma, Dissociation and Psychosis. 1st International conference, Kilden, Kristiansand.

Berg, A. O. (2015 September). Clinical and socio-cultural insight in immigrants in their first episode of psychosis. Paper presented at 5th European Conference on Schizophrenia Research, Berlin.

Berg, A. O. (2015). Differensialdiagnostiske vurderinger ved schizofreni og komplekse dissosiative lidelser. BestPractice Psykiatri/Nevrologi/Geriatri(23), 34-36.

Nerhus, M., Berg, A. O., & Melle, I. (2015 September). Migrant background and visible ethnic minority status as predictors for duration of untreated psychosis. Paper presented at ECSR 2015 Berlin.

Nerhus, M., Berg, A. O., Melle, I., & Andreassen, O. A. (2015 April). Vitamin D status in psychotic disorder patients and healthy controls -The influence of ethnic background. Paper presented at Poster, København.

2014

Berg, A. O. (2014 March). Cultural aspects in mental health research. Paper presented at Introduksjon til tverrdisiplinær forskning i psykiatri og rus, Oslo.

Berg, A. O. (2014 September). Hallucination, trauma and psychosis. Paper presented at Norment annual retreat 2014, Oslo.

Berg, A. O., & Treider, M. (2014 March). Trauma, Mental Health, and Undocumented Migration. Paper presented at ESTD 2014 CONFERENCE, COPENHAGEN.

Berg, A. O., Barrett, E. A., & Melle, I. (2014 November). Insight over time in first generation immigrants with first episode psychosis. Paper presented at 9th International conference on early psychosis, Tokyo.

Berg, A. O., Aas, M., Andreassen, O. A., Hauff, E., Larsson, S., Melle, I., & Nerhus, M. (2014 November). Childhood Trauma Mediates the Association Between Ethnic Minority Status and More Severe Hallucinations in Psychotic Disorder. Paper presented at 9th International conference on early psychosis, Tokyo.

Berg, A. O., Aas, M., Larsson, S., Nerhus, M., Hauff, E., Andreassen, O. A., & Melle, I. (2014 April). Childhood Trauma Mediates the Association Between Ethnic Minority Status and More Severe Hallucinations in Psychotic Disorder. Paper presented at Schizophrenia international research society, Firenze, Italia.

2012

Berg, A. O. (2012). Psykose hos innvandrere. BestPractice Psykiatri/Nevrologi/Geriatri(9), 38-41.

2011

Hope, S., Melle, I., Ueland, T., Lorentzen, S., Steen, N. E., Berg, A. O., . . . Andreassen, O. A. et al. (2011). INTERLEUKIN 1 RECEPTOR ANTAGONIST AND TUMOR NECROSIS FACTOR RECEPTOR 1 ARE ASSOCIATED WITH GENERAL SEVERITY AND PSYCHOTIC SYMPTOMS IN SCHIZOPHRENIA AND BIPOLAR DISORDER. Schizophrenia Bulletin, 37, 115-116.

Ringen, P. A., Melle, I., Berg, A. O., Simonsen, C. E., Agartz, I., Sundet, K. S., & Andreassen, O. A. (2011). THC IN URINE IN SCHIZOPHRENIA: ASSOCIATIONS WITH SYMPTOM LEVELS AND NEUROCOGNITIVE FUNCTIONING. Schizophrenia Bulletin, 37, 279-280.

2009

Berg, A. O., Melle, I., Aminoff, S., Andreassen, O. A., & Hauff, E. (2009). HEIGHTENED RATES OF SCHIZOAFFECTIVE DISORDER AMONG IMMIGRANTS? A CROSS-SECTIONAL STUDY. Schizophrenia Bulletin, 35, 2.