Browsing Bergen Open Research Archive by Author "Berle, Jan Øystein"
Now showing items 1-7 of 7
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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 ... -
The cannabis pathway to non-affective psychosis may reflect less neurobiological vulnerability
Løberg, Else-Marie; Helle, Siri; Nygård, Merethe; Berle, Jan Øystein; Kroken, Rune; Johnsen, Erik (Peer reviewed; Journal article, 2014-11-18)There is a high prevalence of cannabis use reported in non-affective psychosis. Early prospective longitudinal studies conclude that cannabis use is a risk factor for psychosis, and neurochemical studies on cannabis have ... -
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 ... -
Does changing from a first generation antipsychotic (perphenazin) to a second generation antipsychotic (risperidone) alter brain activation and motor activity? A case report
Berle, Jan Øystein; Løberg, Else-Marie; Fasmer, Ole Bernt (Peer reviewed; Journal article, 2013-05-06)Background: In patients with schizophrenia, altered brain activation and motor activity levels are central features, reflecting cognitive impairments and negative symptoms, respectively. Newer studies using nonlinear methods ... -
Linear and non-linear analyses of Conner’s Continuous Performance Test-II discriminate adult patients with attention deficit hyperactivity disorder from patients with mood and anxiety disorders
Fasmer, Ole Bernt; Mjeldheim, Kristin; Førland, Wenche; Hansen, Anita Lill; Syrstad, Vigdis Elin Giæver; Ødegaard, Ketil Joachim; Berle, Jan Øystein (Peer reviewed; Journal article, 2016-08-11)Background: Attention Deficit Hyperactivity Disorder (ADHD) is a heterogeneous disorder. Therefore it is important to look for factors that can contribute to better diagnosis and classification of these patients. The aims ... -
A Naturalistic Study of the Effect of Acupuncture on Heart-Rate Variability
Fasmer, Ole Bernt; Liao, Hanbo; Huang, Yong; Berle, Jan Øystein; Wu, Junxian; Ødegaard, Ketil Joachim; Wik, Gustav; Zhang, Zhangjin (Peer reviewed; Journal article, 2012-02)Objectives: To study the effect of acupuncture on heart rate variability (HRV) by using linear and non-linear methods of analysis. Methods: 40 patients were recruited consecutively, including patients with insomnia, ... -
Nonlinear Analysis of Motor Activity Shows Differences between Schizophrenia and Depression: A Study Using Fourier Analysis and Sample Entropy
Hauge, Erik R.; Berle, Jan Øystein; Ødegaard, Ketil Joachim; Holsten, Fred; Fasmer, Ole Bernt (Peer reviewed; Journal article, 2011-01-28)The purpose of this study has been to describe motor activity data obtained by using wrist-worn actigraphs in patients with schizophrenia and major depression by the use of linear and non-linear methods of analysis. Different ...