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Mechanisms Underlying Auditory Hallucinations-Understanding Perception without Stimulus.

Derek K Tracy1, Sukhwinder S Shergill2

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Auditory verbal hallucinations (AVH), common in schizophrenia, are explored. Research reviews neurocognitive models and brain connectivity, highlighting treatment challenges and the need for new therapies.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Auditory verbal hallucinations (AVH) are prevalent in schizophrenia and the general population.
  • Current models propose neurocognitive underpinnings, including feed-forward and aberrant memory processes.
  • Brain imaging reveals frontotemporal dysconnectivity associated with AVH.

Purpose of the Study:

  • To provide a comprehensive overview of auditory verbal hallucinations.
  • To review current neurocognitive hypotheses and neuroimaging findings.
  • To discuss treatment resistance and the need for novel therapeutic approaches.

Main Methods:

  • Literature review of neurocognitive models of AVH.
  • Synthesis of neuroimaging and connectivity study findings.
  • Discussion of current and emerging treatment strategies.

Main Results:

  • Neurocognitive models suggest failures in sensory information processing and memory.
  • Brain connectivity studies indicate frontotemporal network dysfunction.
  • Many AVH cases are treatment-resistant, necessitating innovative therapies.

Conclusions:

  • Understanding of AVH has advanced, but remains incomplete.
  • Dysconnectivity in frontotemporal regions is a key finding.
  • Development of novel therapies is crucial for managing persistent AVH.