Blar i Faculty of Psychology på forfatter "Hjelmervik, Helene"
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Estradiol driven change in hallucination proneness across the menstrual cycle as studied with a white noise paradigm
Hjelmervik, Helene; Hausmann, Markus; Bless, Josef J.; Harkestad, Nina; Hugdahl, Kenneth Jan; Laloyaux, Julien (Journal article; Peer reviewed, 2023)The estrogen hypothesis for schizophrenia suggests neuroprotective effects of estrogen for the development of the disorder and for symptom severity, including auditory hallucinations. Furthermore, estrogen has shown enhancing ... -
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. ... -
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 ... -
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 ... -
The neural correlates of sex differences in left-right confusion
Hjelmervik, Helene; Westerhausen, Rene; Hirnstein, Marco; Specht, Karsten; Hausmann, Markus (Peer reviewed; Journal article, 2015-03-14)Difficulties in left–right discrimination (LRD) are commonly experienced in everyday life situations. Here we investigate the neurocognitive mechanisms of LRD and the specific role of left angular gyrus. Given that previous ... -
Physical exercise augmented cognitive behaviour therapy for older adults with generalised anxiety disorder (PEXACOG): a feasibility study for a randomized controlled trial
Sirevåg, Kristine; Stavestrand, Silje Haukenes; Sjøbø, Trond; Endal, Trygve Bruun; Nordahl, Hans Morten; Andersson, E.; Nordhus, Inger Hilde; Rekdal, Åsa Kristine; Specht, Karsten; Hammar, Åsa Karin; Halmøy, Anne; Mohlman, J.; Hjelmervik, Helene; Thayer, Julian Francis; Hovland, Anders (Journal article; Peer reviewed, 2023)Background Generalised anxiety disorder (GAD) is a frequent and severe disorder among older adults. For older adults with GAD the effect of the recommended treatment, cognitive behaviour therapy (CBT), is reduced. ... -
Physical exercise augmented cognitive behaviour therapy for older adults with generalised anxiety disorder (PEXACOG): Study protocol for a randomized controlled trial
Stavestrand, Silje Haukenes; Sirevåg, Kristine; Nordhus, Inger Hilde; Sjøbø, Trond; Endal, Trygve; Nordahl, Hans Morten; Specht, Karsten; Hammar, Åsa; Halmøy, Anne; Martinsen, Egil Wilhelm; Andersson, Eva; Hjelmervik, Helene; Mohlman, Jan; Thayer, Julian Francis; Hovland, Anders (Peer reviewed; Journal article, 2019-03-18)Background Generalised anxiety disorder (GAD) is a frequent and severe anxiety disorder among older adults. GAD increases the risk of developing other disorders such as depression and coronary heart disease. Older adults ... -
Resting States Are Resting Traits – An fMRI Study of Sex Differences and Menstrual Cycle Effects in Resting State Cognitive Control Networks
Hjelmervik, Helene; Hausmann, Markus; Osnes, Berge; Westerhausen, René; Specht, Karsten (Peer reviewed; Journal article, 2014-07-24)To what degree resting state fMRI is stable or susceptible to internal mind states of the individual is currently an issue of debate. To address this issue, the present study focuses on sex differences and investigates ... -
Temporal Signatures of Auditory Verbal Hallucinations: An App-Based Experience Sampling Study
Bless, Josef J; Hjelmervik, Helene; Torsheim, Torbjørn; Gudmundsen, Magne; Larøi, Frank; Holma, Irina; Arola, Anne; Korkeila, Jyrki; Hirnstein, Marco; Marquardt, Lynn Anne; Kusztrits, Isabella; Smelror, Runar; Agartz, Ingrid; Hugdahl, Kenneth (Peer reviewed; Journal article, 2020)The assessment of auditory verbal hallucinations (AVHs) has traditionally been conducted through (semi-)structured interviews, such as the Positive and Negative Syndrome Scales (PANSS; Kay et al., 1987) and the Psychotic ...