Browsing Bergen Open Research Archive by Author "Hugdahl, Kenneth"
Now showing items 21-40 of 50
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Feasibility and Acceptability of Using a Mobile Phone App for Characterizing Auditory Verbal Hallucinations in Adolescents With Early-Onset Psychosis: Exploratory Study
Smelror, Runar; Bless, Josef J; Hugdahl, Kenneth; Agartz, Ingrid (Peer reviewed; Journal article, 2019-05-14)Background: Auditory verbal hallucinations (AVH) are the most frequent symptom in early-onset psychosis (EOP) and a risk factor for increased suicide attempts in adolescents. Increased knowledge of AVH characteristics can ... -
Functional asymmetry and effective connectivity of the auditory system during speech perception is modulated by the place of articulation of the consonant – A 7 T fMRI study
Specht, Karsten; Baumgartner, Florian; Stadler, Jörg; Hugdahl, Kenneth; Pollmann, Stefan (Peer reviewed; Journal article, 2014-06-11)To differentiate between stop-consonants, the auditory system has to detect subtle place of articulation (PoA) and voice-onset time (VOT) differences between stop-consonants. How this differential processing is represented ... -
Functional connectome differences in individuals with hallucinations across the psychosis continuum
Schutte, Maya J. L.; Bohlken, Marc M.; Collin, Guusje; Abramovic, Lucija; Boks, Marco P. M.; Cahn, Wiepke; Dauwan, Meenakshi; van Dellen, Edwin; van Haren, Neeltje E. M.; Hugdahl, Kenneth; Koops, Sanne; Mandl, René C. W.; Sommer, Iris E. C. (Journal article; Peer reviewed, 2021)Hallucinations may arise from an imbalance between sensory and higher cognitive brain regions, reflected by alterations in functional connectivity. It is unknown whether hallucinations across the psychosis continuum exhibit ... -
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. ... -
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 ... -
Hallucinations in acutely admitted patients with psychosis, and effectiveness of risperidone, olanzapine, quetiapine, and ziprasidone: a pragmatic, randomized study
Johnsen, Erik; Sinkeviciute, Igne; Løberg, Else-Marie; Kroken, Rune A.; Hugdahl, Kenneth; Jørgensen, Hugo A. (Peer reviewed; Journal article, 2013-09-30)Background Hallucinations are prevalent in schizophrenia and related psychotic disorders and may have severe consequences for the affected patients. Antipsychotic drug trials that specifically address the anti-hallucinatory ... -
How brain asymmetry relates to performance – a large-scale dichotic listening study
Hirnstein, Marco; Hugdahl, Kenneth; Hausmann, Markus (Peer reviewed; Journal article, 2014-01-02)All major mental functions including language, spatial and emotional processing are lateralized but how strongly and to which hemisphere is subject to inter- and intraindividual variation. Relatively little, however, is ... -
Impact of glutamate levels on neuronal response and cognitive abilities in schizophrenia
Falkenberg, Liv Eggset; Westerhausen, René; Craven, Alexander R.; Kroken, Rune A.; Løberg, Else-Marie; Specht, Karsten; Hugdahl, Kenneth (Peer reviewed; Journal article, 2014-04-02)Schizophrenia is characterized by impaired cognitive functioning, and brain regions involved in cognitive control processes show marked glutamatergic abnormalities. However, it is presently unclear whether aberrant neuronal ... -
Inhibition of emotions in healthy aging: age‐related differences in brain network connectivity
Almdahl, Ina S.; Martinussen, Liva Jenny; Agartz, Ingrid; Hugdahl, Kenneth; Korsnes, Maria Stylianou (Journal article; Peer reviewed, 2021)Introduction: Successful inhibition of distracting emotions is important for preserving well-being and daily functioning. There is conflicting evidence regarding the impact of healthy aging on emotional inhibition, and ... -
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 ... -
Involvement of the default mode network under varying levels of cognitive effort
Weber, Sarah; Aleman, André; Hugdahl, Kenneth (Journal article; Peer reviewed, 2022)Everyday cognitive functioning is characterized by constant alternations between different modes of information processing, driven by constant fluctuations in environmental demands. At the neural level, this is realized ... -
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, ... -
Left temporal lobe structural and functional abnormality underlying auditory hallucinations in schizophrenia
Hugdahl, Kenneth; Løberg, Else-Marie; Nygård, Merethe (Peer reviewed; Journal article, 2009-05-01)In this article, we have reviewed recent findings from our laboratory, originally presented in Hugdahl et al. (2008) . These findings reveal that auditory hallucinations in schizophrenia should best be conceptualized as ... -
Listening Difficulties in Children: Behavior and Brain Activation Produced by Dichotic Listening of CV Syllables
Moore, Dave; Hugdahl, Kenneth; Stewart, HJ; Vannest, J; Perdew, AJ; Sloat, NT; Cash, EK; Hunter, LL (Journal article; Peer reviewed, 2020)Listening difficulties (LiD) are common in children with and without hearing loss. Impaired interactions between the two ears have been proposed as an important component of LiD when there is no hearing loss, also known ... -
Mapping psychotic-like experiences: Results from an online survey
Kusztrits, Isabella; Larøi, Frank; Laloyaux, Julien Freddy; Marquardt, Lynn Anne; Sinkeviciute, Igne; Kjelby, Eirik; Johnsen, Erik; Sommer, Iris Else Clara; Hugdahl, Kenneth; Hirnstein, Marco (Journal article; Peer reviewed, 2021)Suggestions have been made that psychotic‐like experiences (PLEs), such as hallucinatory and delusional experiences, exist on a continuum from healthy individuals to patients with a diagnosis of schizophrenia. We used the ... -
A multimodal study of the effects of tDCS on dorsolateral prefrontal and temporo-parietal areas during dichotic listening
Marquardt, Lynn Anne; Kusztrits, Isabella; Craven, Alexander R.; Hugdahl, Kenneth; Specht, Karsten; Hirnstein, Marco (Journal article; Peer reviewed, 2020)The underlying neural mechanisms of transcranial direct current stimulation (tDCS), especially beyond the primary motor cortex, remain unclear. Several studies examined tDCS effects on either functional activity, ... -
Neural activation in the ventromedial prefrontal cortex precedes conscious experience of being in or out of a transient hallucinatory state
Hugdahl, Kenneth; Craven, Alexander R.; Johnsen, Erik; Ersland, Lars; Stoyanov, Drozdstoy; Kandilarova, Sevdalina; Sandøy, Lydia Brunvoll; Kroken, Rune A.; Løberg, Else-Marie; Sommer, Iris E. (Journal article; Peer reviewed, 2022)Background and Hypotheses Auditory verbal hallucinations (AVHs) is not only a common symptom in schizophrenia but also observed in individuals in the general population. Despite extensive research, AVHs are poorly understood, ... -
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), ... -
Olfactory hallucinations in a population-based sample
Wehling, Eike Ines; Bless, Josef J; Hirnstein, Marco; Kråkvik, Bodil; Vedul-Kjelsås, Einar; Hugdahl, Kenneth; Kalhovde, Anne Martha; Larøi, Frank (Journal article; Peer reviewed, 2021)Olfactory hallucinations referring to olfactory perceptions in the absence of chemical stimuli, occur in non-clinical and clinical populations. Few studies have investigated their prevalence in the general population and ... -
Performance monitoring in medication-naïve children with Tourette Syndrome
Eichele, Heike; Eichele, Tom; Bjelland, Ingvar; Høvik, Marie Farstad; Sørensen, Lin; Wageningen, Heidi Karin van; Worren, Marius Kalsås; Hugdahl, Kenneth; Plessen, Kerstin J. (Peer reviewed; Journal article, 2016-03-01)Background: Tourette syndrome (TS) is a childhood-onset neurodevelopmental disorder and its impact on cognitive development needs further study. Evidence from neuropsychological, neuroimaging and electrophysiological studies ...