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Prefrontal cortex as a key node in arousal circuitry.

George A Mashour1, Dinesh Pal2, Emery N Brown3

  • 1Department of Anesthesiology, University of Michigan, Ann Arbor, MI, USA; Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA; Center for Consciousness Science, University of Michigan, Ann Arbor, MI, USA; Michigan Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA; Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI, USA.

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Summary

The prefrontal cortex (PFC) may regulate the level of consciousness, not just its content. Research suggests the medial PFC is crucial for arousal-promoting networks, impacting global brain states.

Keywords:
brainstemconsciousnessgeneral anesthesiaoscillationssleepthalamus

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Consciousness Studies

Background:

  • The prefrontal cortex (PFC) role in consciousness is debated.
  • Research often focuses on PFC's role in conscious content.
  • Emerging evidence suggests PFC involvement in arousal levels.

Purpose of the Study:

  • To review evidence for the PFC's role in regulating the level of consciousness.
  • To explore the medial PFC's function within arousal-promoting networks.

Main Methods:

  • Review of recent theoretical and empirical investigations.
  • Analysis of data supporting the medial PFC's role in arousal.

Main Results:

  • The PFC is implicated in regulating the global state of arousal.
  • The medial PFC appears to be a critical node in arousal networks.

Conclusions:

  • The PFC significantly contributes to the level of consciousness.
  • The medial PFC is vital for maintaining arousal-promoting brain networks.