Browsing Bergen Open Research Archive by Author "Kompus, Kristiina"
Now showing items 1-17 of 17
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Auditory verbal hallucinations in persons with and without a need for care
Johns, Louise C.; Kompus, Kristiina; Connell, Melissa; Humpston, Clara; Lincoln, Tania M.; Longden, Eleanor; Preti, Antonio; Alderson-Day, Ben; Badcock, Johanna C.; Cella, Matteo; Fernyhough, Charles; McCarthy-Jones, Simon; Peters, Emmanuelle; Raballo, Andrea; Scott, James; Siddi, Sara; Sommer, Iris E.; Larøi, Frank (Peer reviewed; Journal article, 2014)Auditory verbal hallucinations (AVH) are complex experiences that occur in the context of various clinical disorders. AVH also occur in individuals from the general population who have no identifiable psychiatric or ... -
A critical review of pro-cognitive drug targets in psychosis: convergence on myelination and inflammation
Kroken, Rune; Løberg, Else-Marie; Drønen, Tore; Grüner, Renate; Hugdahl, Kenneth; Kompus, Kristiina; Skrede, Silje; Johnsen, Erik (Peer reviewed; Journal article, 2014-02-04)Antipsychotic drugs have thus far focused on dopaminergic antagonism at the D2 receptors, as counteracting the hyperdopaminergia in nigrostriatal and mesolimbic projections has been considered mandatory for the antipsychotic ... -
Development of a new course on analysis methods in cognitive neuroscience using problem-based learning
Kompus, Kristiina (UPED-skrift, Working paper, 2016) -
Dynamic Functional Connectivity Patterns in Schizophrenia and the Relationship With Hallucinations
Weber, Sarah; Johnsen, Erik; Kroken, Rune Andreas; Løberg, Else-Marie; Kandilarova, Sevdalina; Stoyanov, Drozdstoy; Kompus, Kristiina; Hugdahl, Kenneth (Journal article; Peer reviewed, 2020)There is a wealth of evidence showing aberrant functional connectivity (FC) in schizophrenia but with considerable variability in findings across studies. Dynamic FC is an extension of traditional static FC, in that such ... -
Dynamic up- and down-regulation of the default (DMN) and extrinsic (EMN) mode networks during alternating task-on and task-off periods
Hugdahl, Kenneth; Kazimierczak, Katarzyna Anna; Beresniewicz, Justyna; Kompus, Kristiina; Westerhausen, René; Ersland, Lars; Grüner, Renate; Specht, Karsten (Peer reviewed; Journal article, 2019)Using fMRI, Hugdahl et al. (2015) reported the existence of a general-domain cortical network during active task-processing which was non-specific to the cognitive task being processed. They labelled this network the ... -
Glutamate- and GABA-Modulated Connectivity in Auditory Hallucinations—A Combined Resting State fMRI and MR Spectroscopy Study
Weber, Sarah; Hjelmervik, Helene; Craven, Alexander R.; Johnsen, Erik; Kroken, Rune Andreas; Løberg, Else-Marie; Ersland, Lars; Kompus, Kristiina; Hugdahl, Kenneth (Journal article; Peer reviewed, 2021)Background: Auditory verbal hallucinations (AVH) have been linked to aberrant interhemispheric connectivity between the left and the right superior temporal gyrus (STG), labeled the interhemispheric miscommunication theory. ... -
Glutamatergic modulation of auditory cortex connectivity with attentional brain networks in unpredictable perceptual environment
Kompus, Kristiina; Volehaugen, Vegard; Craven, Alexander R.; Specht, Karsten (Journal article; Peer reviewed, 2020)In a stable environment the brain can minimize processing required for sensory input by forming a predictive model of the surrounding world and suppressing neural response to predicted stimuli. Unpredicted stimuli lead to ... -
Hallucinating schizophrenia patients have longer left arcuate fasciculus fiber tracks: a DTI tractography study
Falkenberg, Liv E.; Westerhausen, René; Johnsen, Erik; Kroken, Rune Andreas; Løberg, Else-Marie; Beresniewicz, Justyna; Kazimierczak, Katarzyna Anna; Kompus, Kristiina; Ersland, Lars; Sandøy, Lydia Brunvoll; Hugdahl, Kenneth (Journal article; Peer reviewed, 2020)The arcuate fasciculus (AF) has been implicated in the pathology behind schizophrenia and auditory verbal hallucinations (AVHs). White matter tracts forming the arcuate fasciculus can be quantified and visualized using ... -
Intra-Regional Glu-GABA vs Inter-Regional Glu-Glu Imbalance: A 1H-MRS Study of the Neurochemistry of Auditory Verbal Hallucinations in Schizophrenia.
Hjelmervik, Helene; Craven, Alexander R.; Sinkeviciute, Igne; Johnsen, Erik; Kompus, Kristiina; Bless, Josef Johann; Kroken, Rune Andreas; Løberg, Else-Marie; Ersland, Lars; Gruner, Eli Renate; Hugdahl, Kenneth (Peer reviewed; Journal article, 2019-10-18)Glutamate (Glu), gamma amino-butyric acid (GABA), and excitatory/inhibitory (E/I) imbalance have inconsistently been implicated in the etiology of schizophrenia. Elevated Glu levels in language regions have been suggested ... -
Laterality across languages: Results from a global dichotic listening study using a smartphone application
Bless, Josef J.; Westerhausen, Rene; Torkildsen, Janne; Gudmundsen, Magne; Kompus, Kristiina; Hugdahl, Kenneth (Peer reviewed; Journal article, 2015-01-14)Left-hemispheric language dominance has been suggested by observations in patients with brain damages as early as the 19th century, and has since been confirmed by modern behavioural and brain imaging techniques. Nevertheless, ... -
Negative valence of hallucinatory voices as predictor of cortical glutamatergic metabolite levels in schizophrenia patients
Hjelmervik, Helene; Craven, Alexander R.; Johnsen, Erik; Kompus, Kristiina; Bless, Josef Johann; Sinkeviciute, Igne; Kroken, Rune Andreas; Løberg, Else-Marie; Ersland, Lars; Grüner, Eli Renate; Sommer, Iris E.; Hugdahl, Kenneth Jan (Journal article; Peer reviewed, 2021)Objectives Negative emotional valence of auditory verbal hallucinations (AVHs) in schizophrenia can be a source of distress and is considered a strong predictor of illness severity. Previous studies have found glutamate ... -
No Effects of Anodal tDCS on Local GABA and Glx Levels in the Left Posterior Superior Temporal Gyrus
Dwyer, Gerard Eric; Craven, Alexander R.; Hirnstein, Marco; Kompus, Kristiina; Assmus, Jörg; Ersland, Lars; Hugdahl, Kenneth; Grüner, Renate (Peer reviewed; Journal article, 2019-01-08)A number of studies investigating the biological effects of transcranial direct current stimulation (tDCS) using magnetic resonance spectroscopy (MRS) have found that it may affect local levels of γ-aminobutyric acid (GABA), ... -
Prevalence of auditory hallucinations in Norwegian adolescents: Results from a population-based study
Kompus, Kristiina; Løberg, Else-Marie; Posserud, Maj-Britt Rocio; Lundervold, Astri (Peer reviewed; Journal article, 2015-05-12)Knowing the prevalence and characteristics of auditory verbal hallucinations (AVH) in adolescents is important for estimations of need for mental health care and assessment of psychosis risk. In this report we assess the ... -
Prevalence of auditory verbal hallucinations in a general population: A group comparison study
Kråkvik, Bodil; Larøi, Frank; Kalhovde, Anne Martha; Hugdahl, Kenneth; Kompus, Kristiina; Salvesen, Øyvind; Stiles, Tore C; Vedul-Kjelsås, Einar (Peer reviewed; Journal article, 2015-10)The present study was specifically designed to investigate the prevalence of auditory verbal hallucinations (AVH) in the general population, and sought to compare similarities and differences regarding socio-demographics, ... -
Psychosocial characteristics differentiate non-distressing and distressing voices in 10,346 adolescents
Løberg, Else-Marie; Gjestad, Rolf; Posserud, Maj-Britt Rocio; Kompus, Kristiina; Lundervold, Astri (Peer reviewed; Journal article, 2019)Adolescents hearing non-existent voices may be at risk for psychosis, but the prevalence of voice-hearing (VH) in the general population complicates clinical interpretations. Differentiating between VH with and without ... -
The role of the primary auditory cortex in the neural mechanism of auditory verbal hallucinations
Kompus, Kristiina; Falkenberg, Liv Eggset; Bless, Josef J; Johnsen, Erik; Kroken, Rune; Kråkvik, Bodil; Larøi, Frank; Løberg, Else-Marie; Vedul-Kjelsås, Einar; Westerhausen, René; Hugdahl, Kenneth (Peer reviewed; Journal article, 2013-04-24)Auditory verbal hallucinations (AVHs) are a subjective experience of “hearing voices” in the absence of corresponding physical stimulation in the environment. The most remarkable feature of AVHs is their perceptual quality, ... -
Self-supervised, mobile-application based cognitive training of auditory attention: A behavioral and fMRI evaluation
Bless, Josef J; Westerhausen, René; Kompus, Kristiina; Gudmundsen, Magne; Hugdahl, Kenneth; Hugdahl, Kenneth (Peer reviewed; Journal article, 2014-07)Emerging evidence of the validity of collecting data in natural settings using smartphone applications has opened new possibilities for psychological assessment, treatment, and research. In this study we explored the ...