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Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
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Hippocampus plays a role in speech feedback processing.

Vincent van de Ven1, Lourens Waldorp2, Ingrid Christoffels1

  • 1Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, the Netherlands.

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|September 4, 2020
PubMed
Summary
This summary is machine-generated.

The hippocampus is crucial for speech production, not just memory. It helps predict sensory consequences of speaking, as shown by brain activity during unimpeded speech feedback.

Keywords:
HippocampusOvert picture namingPsycho-physiological interactionsSensory predictionSpeech monitoring

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psycholinguistics

Background:

  • The hippocampus's role in language production is debated.
  • Theories suggest it supports semantic memory or processes speech feedback prediction.
  • Functional magnetic resonance imaging (fMRI) studies explore its involvement.

Purpose of the Study:

  • To investigate the hippocampus's role in speech production.
  • To differentiate between memory-based and prediction-based accounts of hippocampal function in language.
  • To analyze fMRI data from picture-naming tasks with varying speech feedback conditions.

Main Methods:

  • Re-analysis of fMRI data from two overt picture-naming studies.
  • Participants named pictures while receiving unimpeded or noise-masked speech feedback.
  • Analysis of hippocampal activity and functional connectivity patterns.

Main Results:

  • Hippocampal activity decreased with impaired speech feedback.
  • Increased functional coupling between auditory cortex and hippocampus during unimpeded feedback.
  • Hippocampal/supplementary motor area (SMA) interaction showed coupling with auditory cortex, anterior cingulate cortex, and cerebellum during speech production.

Conclusions:

  • Findings support a "prediction" account of hippocampal involvement in speech production.
  • The hippocampus appears to predict sensory consequences of vocalizations.
  • This role in prediction is specific to speech production, not passive listening.