Blar i forfatter "Hirnstein, Marco"

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    • Eliciting false auditory perceptions using speech frequencies and semantic priming: a signal detection approach 

      Laloyaux, Julien; Hirnstein, Marco; Specht, Karsten; Giersch, Anne; Larøi, Frank (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-04)
      Introduction - Individuals experiencing auditory hallucinations (AH) tend to perceive voices when exposed to random noise. However, the factors driving this tendency remain unclear. The present study examined the interaction of a top-down (expectations) and bottom-up (type of noise) process to better understand the mechanisms that underlie AH.<p> <p>Methods - Fifty-two healthy individuals (29 ...

    • Language lateralisation measured across linguistic and national boundaries 

      Hausmann, Markus; Brysbaert, Marc; van der Haegen, Lise; Lewald, Jörg; Specht, Karsten; Hirnstein, Marco; Willemin, Julie; Barton, Jack; Buchilly, Delia; Chmetz, Florian; Roch, Maja; Brederoo, Sanne; Dael, Nele; Mohr, Christine (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-03)
      The visual half-field technique has been shown to be a reliable and valid neuropsychological measurement of language lateralisation, typically showing higher accuracy and faster correct responses for linguistic stimuli presented in the right visual field (RVF) than left visual field (LVF). The RVF advantage corresponds to the well-known dominance of the left hemisphere (LH) in processing language(s). ...

    • 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; Tidsskriftartikkel; Peer reviewed, 2020-08-03)
      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, neurotransmitters or behavior but few investigated those aspects together to reveal how the brain responds to tDCS. The objective is to elucidate the underlying mechanisms of tDCS using a ...

    • Pilot-RCT Finds No Evidence for Modulation of Neuronal Networks of Auditory Hallucinations by Transcranial Direct Current Stimulation 

      Marquardt, Lynn Anne; Craven, Alexander R.; Hugdahl, Kenneth Jan; Johnsen, Erik; Kroken, Rune Andreas; Kusztrits, Isabella; Specht, Karsten; Thomassen, Anne Synnøve; Weber, Sarah; Hirnstein, Marco (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-12)
      Background: Transcranial direct current stimulation (tDCS) is used as treatment for auditory verbal hallucinations (AVH). The theory behind the treatment is that tDCS increases activity in prefrontal cognitive control areas, which are assumed to be hypoactive, and simultaneously decreases activity in temporal speech perception areas, which are assumed to be hyperactive during AVH. We tested this ...

    • Sex- and sex hormone-related variations in energy-metabolic frontal brain asymmetries: A magnetic resonance spectroscopy study 

      Hjelmervik, Helene; Hausmann, Markus; Craven, Alexander R.; Hirnstein, Marco; Hugdahl, Kenneth; Specht, Karsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-31)
      Creatine is a key regulator of brain energy homeostasis, and well-balanced creatine metabolism is central in healthy brain functioning. Still, the variability of brain creatine metabolism is largely unattended in magnetic resonance spectroscopy (MRS) research. In the human brain, marginal sex differences in creatine levels have been found in the prefrontal cortex. It is however not known to ...