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A Role for the Claustrum in Salience Processing?

Jared B Smith1, Glenn D R Watson2, Zhifeng Liang3

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|July 6, 2019
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Summary
This summary is machine-generated.

The claustrum (CLA), a brain structure, is involved in the salience network, integrating information to guide attention. This research explores its role in salience-guided orienting and sensory processing.

Keywords:
amygdalaanatomical connectivityclaustrumfunctional connectivityinsulamedial prefrontal cortexsalience networkthalamus

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Cognitive Neuroscience

Background:

  • The claustrum (CLA) is a mammalian subcortical structure with an unclear function.
  • Previous research linked the CLA to the default mode network (DMN) in awake rats using resting-state functional magnetic resonance imaging (rs-fMRI).
  • Anesthesia abolished these CLA-DMN connections, suggesting a role in conscious states.

Purpose of the Study:

  • To review evidence for the CLA's involvement in the salience network (SN) in rodents.
  • To compare the functional and anatomical connections of the CLA and insula in rodents.
  • To elucidate the CLA's role in salience-guided attention and orienting.

Main Methods:

  • Review of existing literature on CLA connectivity.
  • Analysis of rs-fMRI data in rodents.
  • Neuroanatomical tracing studies in rodents.
  • Comparison with human SN circuitry.

Main Results:

  • The rodent CLA shows connections with SN structures, including the cingulate cortex.
  • Similarities and differences exist between CLA and insula connectivity.
  • The CLA integrates limbic information (from mPFC, MD thalamus, BLA) to guide sensory and motor cortex for attention.

Conclusions:

  • The CLA plays a crucial role in the salience network.
  • The CLA is involved in salience-guided orienting.
  • The CLA integrates diverse information to direct attention towards relevant stimuli.