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Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
13:04

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Published on: September 19, 2012

[Risk taking and the insular cortex].

Hironori Ishii1, Ken-Ichiro Tsutsui, Toshio Iijima

  • 1Division of Systems Neuroscience, Tohoku University Graduate School of Life Sciences.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|August 7, 2013
PubMed
Summary
This summary is machine-generated.

The anterior insular cortex (AIC) drives risk-seeking behavior, while the orbitofrontal cortex (OFC) modulates it. Understanding these brain regions is key to deciphering risky decision-making processes.

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Area of Science:

  • Neuroscience
  • Decision-making research

Context:

  • Risky decision-making is fundamental to survival and success.
  • Human imaging studies show anterior insular cortex (AIC) activation during gambling tasks.
  • The causal role of the AIC in risky decisions remained unclear.

Purpose:

  • To investigate the causal involvement of the anterior insular cortex (AIC) in risky decision-making.
  • To explore the roles of the AIC and orbitofrontal cortex (OFC) in balancing risk-avoidance and risk-seeking behaviors.

Summary:

  • Temporary inactivation of the AIC in rats decreased risk preference.
  • Inactivation of the adjacent orbitofrontal cortex (OFC) increased risk preference, consistent with human studies of OFC damage.
  • The intact AIC appears to promote risk-seeking behavior, with the AIC and OFC jointly regulating risk assessment.

Impact:

  • Provides causal evidence for the AIC's role in promoting risk-seeking.
  • Highlights the opposing yet crucial roles of the AIC and OFC in balancing risk.
  • Suggests future research combining inactivation and electrophysiology to elucidate the AIC-OFC functional relationship in decision-making.