Limbic System and Its Components

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Questions and Answers

What is another name for the limbic system?

  • Frontal cortex
  • Occipital lobe
  • Rhinencephalon (correct)
  • Cerebellum

Which component is NOT part of the limbic lobe proper?

  • Occipital lobe (correct)
  • Parahippocampal gyrus
  • Cingulate gyrus
  • Subcallosal gyrus

Which structure is included in the main divisions of the hippocampal formation?

  • Habenula
  • Cerebellum
  • Amygdala (correct)
  • Thalamus

How many layers does the dentate gyrus contain?

<p>&gt;3 layers (C)</p> Signup and view all the answers

Which brain region is NOT part of the Limbic System concept?

<p>Visual cortex (D)</p> Signup and view all the answers

What is the relationship between the limbic system and the subcallosal gyrus?

<p>The subcallosal gyrus is a component of the limbic lobe proper. (B)</p> Signup and view all the answers

Which of the following structures is NOT classified under the cerebral components of the limbic system concept?

<p>Prefrontal cortex (C)</p> Signup and view all the answers

What is the relationship between the limbic lobe proper and the parahippocampal gyrus?

<p>The parahippocampal gyrus forms part of the limbic lobe proper. (C)</p> Signup and view all the answers

How does the amygdala relate to the archistriatum within the limbic system concept?

<p>The amygdala and archistriatum are distinct structures in the limbic system. (B)</p> Signup and view all the answers

How does the habenula relate to the thalamus dorsomedial within the limbic system concept?

<p>The habenula functions as a regulator for the thalamus dorsomedial. (D)</p> Signup and view all the answers

Flashcards

Another name for limbic system?

Rhinencephalon

Limbic lobe NOT part of?

Occipital lobe

Component of hippocampal formation?

Amygdala

Dentate gyrus layers?

3 layers

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NOT part of Limbic System?

Visual cortex

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Subcallosal gyrus relationship?

Part of limbic lobe

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NOT cerebral part of limbic system?

Prefrontal cortex

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Parahippocampal gyrus relationship?

Part of limbic lobe

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Amygdala and archistriatum relation?

Separate structures

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Habenula and thalamus dorsomedial relation?

Habenula regulates thalamus dorsomedial

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Study Notes

Limbic System Definition

  • Also known as visceral brain, old brain, or rhinencephalon
  • Consists of limbic lobe proper and additional structures

Limbic Lobe Proper

  • Comprised of cerebral components:
    • Subcallosal gyrus
    • Cingulate gyrus
    • Isthmus
    • Parahippocampal gyrus
  • Includes hippocampal formation:
    • Subiculum
    • Hippocampus (Ammon's horn)
    • Dentate gyrus
  • Also includes amygdala (archistriatum)

Limbic System Concept

  • Includes additional structures:
    • Hypothalamus
    • Thalamus (dorsomedial)
    • Habenula
    • Brainstem
    • Prefrontal cortex

Main Divisions of Limbic Lobe

  • Hippocampal formation:
    • Hippocampus: 3 layers, output
    • Dentate gyrus: 3 layers, input molecular
      • 1 pyramidal (5) or granules (4)
    • Subiculum: >3layers

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