Globus pallidus externus

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Globus Pallidus Externus

Globus Pallidus Externus (pronunciation: gloh-buhs pal-i-duhs ek-stur-nuhs) is a subcortical structure of the brain that is part of the basal ganglia. It plays a crucial role in the regulation of voluntary movement.

Etymology

The term "Globus Pallidus Externus" is derived from Latin, where "globus" means sphere, "pallidus" means pale, and "externus" signifies external. Thus, it refers to the external pale sphere in the brain.

Function

The Globus Pallidus Externus, along with the Globus Pallidus Internus, forms the Globus Pallidus, which is a component of the basal ganglia. The Globus Pallidus Externus is involved in the indirect pathway of movement. It receives signals from the striatum and sends inhibitory signals to the subthalamic nucleus.

Related Terms

  • Basal Ganglia: A group of nuclei in the brain associated with control of voluntary motor movements, procedural learning, habit learning, eye movements, cognition, and emotion.
  • Globus Pallidus Internus: The inner segment of the Globus Pallidus, which plays a role in the direct pathway of movement.
  • Striatum: A part of the forebrain, it is involved in the reward system and movement.
  • Subthalamic Nucleus: A small lens-shaped nucleus in the brain where it is, in humans, on the inner side of the thalamus.

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