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Related Experiment Videos

[How does the nucleus accumbens function?].

E Fernández-Espejo1

  • 1Departamento de Fisiología Médica, Facultad de Medicina, Universidad de Sevilla, España. efespejo@cica.es

Revista De Neurologia
|June 28, 2000
PubMed
Summary

The nucleus accumbens, a brain region linking motivation and action, comprises a shell (coincidence detector) and core (motor sequencer). This limbic-motor interface integrates adaptive behaviors and motor control.

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Area of Science:

  • Neuroscience
  • Behavioral Neuroscience

Context:

  • The nucleus accumbens is a critical brain region involved in motivation and action.
  • It plays a significant role in various behaviors including feeding, sexual activity, reward processing, stress responses, and drug self-administration.

Purpose:

  • To elucidate the functional organization of the nucleus accumbens.
  • To describe the distinct roles of its core and shell territories.
  • To highlight its function as a limbic-motor interface.

Summary:

  • The nucleus accumbens has two territories: the core and the shell.
  • The shell acts as a 'coincidence detector' activated by adaptive behavioral situations via connections with the prefrontal cortex, amygdala, and hippocampus.
  • The core, linked to motor systems, mediates goal-directed motor sequences reinforced by shell activation, with dopamine stabilizing these processes.

Impact:

  • Provides a framework for understanding how the nucleus accumbens integrates limbic information with motor output.
  • Enhances comprehension of the neural basis of motivated behaviors.
  • Offers insights into the neurobiological underpinnings of reward and addiction.

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