• Comparison of seven modelling algorithms for γ-aminobutyric acid–edited proton magnetic resonance spectroscopy 

      Craven, Alexander R.; Bhattacharyya, Pallab K.; Clarke, William T.; Dydak, Ulrike; Edden, Richard A.E.; Ersland, Lars; Mandal, Pravat K.; Mikkelsen, Mark; Murdoch, James B.; Near, Jamie; Rideaux, Reuben; Shukla, Deepika; Wang, Min; Wilson, Martin; Zöllner, Helge J.; Hugdahl, Kenneth Jan; Oeltzschner, Georg (Journal article; Peer reviewed, 2022)
      Edited MRS sequences are widely used for studying γ-aminobutyric acid (GABA) in the human brain. Several algorithms are available for modelling these data, deriving metabolite concentration estimates through peak fitting ...
    • Correlates of Hallucinatory Experiences in the General Population: An International Multisite Replication Study 

      Moseley, Peter; Aleman, André; Allen, Paul; Bell, Vaughan; Bless, Josef Johann; Bortolon, Catherine; Cello, Matteo; Garrison, Jane; Hugdahl, Kenneth Jan; Kozáková, Eva; Larøi, Frank; Moffatt, Jamie; Say, Nicolas; Smailes, David; Suzuki, Mimi; Toh, Wei Lin; Woodward, Todd; Zaytseva, Yuliya; Rossell, Susan; Fernyhough, Charles (Journal article; Peer reviewed, 2021)
      Hallucinatory experiences can occur in both clinical and nonclinical groups. However, in previous studies of the general population, investigations of the cognitive mechanisms underlying hallucinatory experiences have ...
    • Differential Effectiveness of Atypical Antipsychotics on Hallucinations: A Pragmatic Randomized Controlled Trial 

      Sinkeviciute, Igne; Hugdahl, Kenneth Jan; Bartz-Johannessen, Christoffer; Kroken, Rune Andreas; Løberg, Else-Marie; Kjelby, Eirik; Rettenbacher, maria; Joa, Inge; Reitan, Solveig Merete Klæbo; Alisauskiene, Renata; Fathian, Farivar; Johnsen, Erik (Journal article; Peer reviewed, 2021-07)
      Background Most studies investigating antipsychotic effectiveness report either total psychopathology or symptom cluster findings. Studies focusing on a separate symptom, such as hallucinations, a hallmark symptom in ...
    • In the twilight zone: An epidemiological study of sleep-related hallucinations 

      Bless, Josef Johann; Hugdahl, Kenneth Jan; Kråkvik, Bodil; Vedul-Kjelsås, Einar; Kalhovde, Anne Martha; Grønli, Janne; Larøi, Frank (Journal article; Peer reviewed, 2021)
      Background Few studies have investigated hallucinations that occur at the onset/offset of sleep (called hypnagogic/hypnopompic hallucinations; HHHs), despite the fact that their prevalence in the general population is ...
    • Modular-Level Functional Connectome Alterations in Individuals With Hallucinations Across the Psychosis Continuum 

      Schutte, Maya J. L.; Voppel, Alban; Collin, Guusje; Abramovic, Lucija; Boks, Marco P. M.; Cahn, Wiepke; van Haren, Neeltje E. M.; Hugdahl, Kenneth Jan; Koops, Sanne; Mandl, René C. W.; Sommer, Iris E. C. (Journal article; Peer reviewed, 2022)
      Functional connectome alterations, including modular network organization, have been related to the experience of hallucinations. It remains to be determined whether individuals with hallucinations across the psychosis ...
    • 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 ...
    • Simultaneous Measurement of the BOLD Effect and Metabolic Changes in Response to Visual Stimulation Using the MEGA-PRESS Sequence at 3 T 

      Dwyer, Gerard Eric; Craven, Alexander R.; Beresniewicz, Justyna; Kazimierczak, Katarzyna Anna; Ersland, Lars; Hugdahl, Kenneth Jan; Grüner, Eli Renate (Journal article; Peer reviewed, 2021)
      The blood oxygen level dependent (BOLD) effect that provides the contrast in functional magnetic resonance imaging (fMRI) has been demonstrated to affect the linewidth of spectral peaks as measured with magnetic resonance ...
    • Transcranial direct current stimulation (tDCS) enhances internal source monitoring abilities in healthy participants 

      Kusztrits, Isabella; Marquardt, Lynn Anne; Hugdahl, Kenneth Jan; Hirnstein, Marco (Journal article; Peer reviewed, 2021-09-16)
      Source monitoring refers to the ability to identify the origin of a memory, for example, whether you remember saying something or thinking about it, and confusions of these sources have been associated with the experience ...