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Diencephalon: Thalamus and Information Relay01:27

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The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological...
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Functional Brain Systems: Limbic System01:15

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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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Diencephalon: Anatomical Regions01:30

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The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the...
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Diencephalon: Hypothalamus and Coordination01:23

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The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
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Brainstem: Control Centers of Medulla01:21

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The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
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Brainstem01:19

Brainstem

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The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
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The Subthalamic Nucleus, Limbic Function, and Impulse Control.

P Justin Rossi1,2, Aysegul Gunduz3, Michael S Okun4

  • 1Center for Movement Disorders and Neurorestoration, University of Florida, Gainesville, FL, USA. pjrossi@ufl.edu.

Neuropsychology Review
|November 19, 2015
PubMed
Summary

Deep brain stimulation (DBS) for Parkinson's disease (PD) impacts non-motor functions. Research highlights the subthalamic nucleus (STN) role in impulse control, crucial for treating related disorders.

Keywords:
Deep brain stimulationImpulse control disorderSubthalamic nucleus

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Area of Science:

  • Neuroscience
  • Neurology
  • Psychiatry

Background:

  • Deep brain stimulation (DBS) of the subthalamic nucleus (STN) is used for Parkinson's disease (PD) motor symptoms.
  • STN-DBS can cause unintended non-motor side effects, particularly on behavior.
  • Research indicates the STN's involvement in limbic functions, including impulse control.

Purpose of the Study:

  • To review the role of the STN in impulse control and valence processing.
  • To explore implications for treating impulse control disorders (ICDs) in Parkinson's disease patients.

Main Methods:

  • Review of pre-clinical studies.
  • Analysis of clinical observations.
  • Examination of behavioral, imaging, and electrophysiological data.

Main Results:

  • The STN plays a significant role in mediating limbic functions.
  • STN dysfunction is implicated in impulse control disorders (ICDs).
  • ICDs affect a substantial portion of Parkinson's disease patients, especially those on dopamine agonist therapy.

Conclusions:

  • Understanding STN's limbic function is vital for managing non-motor symptoms in PD.
  • Targeting STN function may offer new therapeutic strategies for ICDs in PD.
  • Further research is needed to fully elucidate STN's role in impulse control and related disorders.