The Limbic System

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| By Thames

Thames

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| Questions: 17

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1. What structure follows the mamillary bodies in the Papez circuit?

Cerebral cortex

The anterior nucleus of the thalamus and the septal area (mamillothalamic tract)

Hippocampus

Cerebellum

The Papez circuit is a neural pathway in the brain involved in the control of emotional responses. The correct answer outlines the structures that follow the mamillary bodies in this circuit, which includes the anterior nucleus of the thalamus and the septal area.

Explanation

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About This Quiz

Explore the complexities of the limbic system, focusing on its structure, functions, and impact on emotions and memory. This educational resource is designed to enhance understanding of neurological... see moreprocesses, targeting students and professionals in biology and psychology. see less

2. What structures come after the anterior nucleus of the thalamus and septal area in the Papez circuit, and what connects them?

The prefrontal cortex and hippocampus connected by the uncinate fasciculus.

The entorhinal cortex and para hippocampal gyrus. connected by the cingulum bundle

The hypothalamus and mammillary bodies connected by the mammillothalamic tract.

The amygdala and insula connected by the fornix.

The Papez circuit is a neural circuit involved in forming new memories and emotions. Understanding the structures and connections involved in this circuit is key to understanding memory formation.

Explanation

The Papez circuit is a neural circuit involved in forming new memories and emotions. Understanding the structures and connections involved in this circuit is key to understanding memory formation.

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3. What structures come after the entorhinal cortex and the parahippocampal gyrus in the Papez circuit?

The prefrontal cortex and insular cortex

The thalamus and hypothalamus

The hippocampus and amygdala

The basal ganglia and cingulate cortex

The Papez circuit is a neural pathway involved in the regulation of emotions and memory, comprising the entorhinal cortex, parahippocampal gyrus, hippocampus, and amygdala. The incorrect answers do not follow the sequential order in the Papez circuit.

Explanation

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4. What neural structures connect the hippocampus and amygdala to the mamillary bodies?

The optic chiasm and pituitary gland

The fornix and stria terminalis

The caudate nucleus and putamen

The corpus callosum and thalamus

The fornix and stria terminalis are key neural pathways connecting specific regions of the brain, facilitating communication and information processing related to memory and emotional responses.

Explanation

The fornix and stria terminalis are key neural pathways connecting specific regions of the brain, facilitating communication and information processing related to memory and emotional responses.

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5. Where is the hippocampus located?

In the cerebellum on top of the brainstem.

In the occipital lobe at the back of the brain.

In the temporal lobe along the floor of the lateral ventricle

In the frontal lobe next to the olfactory bulb.

The hippocampus is a part of the brain that is located in the temporal lobe along the floor of the lateral ventricle. It plays a crucial role in memory formation and spatial navigation.

Explanation

The hippocampus is a part of the brain that is located in the temporal lobe along the floor of the lateral ventricle. It plays a crucial role in memory formation and spatial navigation.

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6. What are the superior and inferior relations of the commissure of the fornix?

It is superior to the pineal gland and inferior to the mammillary bodies.

It is superior to the cerebellar vermis and inferior to the hypothalamus.

It is superior to the cerebral aqueduct and inferior to the optic chiasm.

It is superior to the thalami nucleii and inferior to the corpus callosum

The commissure of the fornix is a structure within the brain that is situated superiorly to the thalamic nuclei and inferiorly to the corpus callosum. The other options do not accurately represent the superior and inferior relations of the commissure of the fornix.

Explanation

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7. Where is the amygdala located in relation to the temporal lobe?

At the superior aspect

Near the anterior pole

Within the occipital lobe

Beneath the sylvian fissure

The amygdala is located near the anterior pole of the temporal lobe, specifically in the medial temporal lobe region.

Explanation

The amygdala is located near the anterior pole of the temporal lobe, specifically in the medial temporal lobe region.

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8. Where is the amygdala in relation to the lateral ventricle?

It is anterior and superior to its inferior horn

It is medial and inferior to its superior horn.

It is posterior and inferior to its inferior horn.

It is superior and anterior to its anterior horn.

The correct answer describes the anatomical positioning of the amygdala in relation to the lateral ventricle. The incorrect answers provide plausible but inaccurate descriptions to test understanding of the concept.

Explanation

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9. Where is the amygdala in relation to the hippocampus?

Superior and inferior to its superior limit.

Medial and anterior to its anterior limit

Lateral and posterior to its posterior limit.

Posterior and medial to its posterior limit.

The correct answer describes the relative position of the amygdala compared to the hippocampus, highlighting its specific location.

Explanation

The correct answer describes the relative position of the amygdala compared to the hippocampus, highlighting its specific location.

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10. What is the name of a syndrome that causes increased docility and is associated with a lesion on the amygdala?

Asperger's syndrome

Down syndrome

Tourette syndrome

Kluvur-Bucy syndrome

Kluver-Bucy syndrome is characterized by symptoms such as loss of normal fear and anger responses, hypersexuality, hyperorality, and other behavioral changes, and is associated with damage to the amygdala.

Explanation

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11. What is the size of the amygdala and what percentage of brain volume does it occupy? How many nuclei does it contain?

2.0 cm3, 0.2% of brain volume, 8 nuclei

1.5 cm3, 0.1% of brain volume, 6 nuclei

3.0 cm3, 0.5% of brain volume, 9 nuclei

2.25 cm30.3% of brain volume13 nuclei

The amygdala typically measures about 2.25 cubic centimeters in size, occupying approximately 0.3% of the brain volume, and contains 13 nuclei. The incorrect answers provided different measurements and numbers of nuclei, but the correct values are 2.25 cm3, 0.3% of brain volume, and 13 nuclei.

Explanation

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12. Where is the septal area located?

Behind the cerebellum.

Below the optic chiasm.

At the base of the septum pellucidum and anterior to the anterior commisure

Adjacent to the occipital lobe of the brain.

The septal area is specifically found at the base of the septum pellucidum and anterior to the anterior commissure.

Explanation

The septal area is specifically found at the base of the septum pellucidum and anterior to the anterior commissure.

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13. What structures input to the septal area?

The hippocampus and the substantia nigra via the nigrostriatal pathway.

The amygdala and the thalamus via the mamillothalamic tract.

The cingulate gyrus and the corpus callosum via the longitudinal fasciculus.

The fornix and from the habenula via the stria medullaris

The correct answer involves the fornix and the habenula through the stria medullaris pathway, which are known inputs to the septal area for various functions.

Explanation

The correct answer involves the fornix and the habenula through the stria medullaris pathway, which are known inputs to the septal area for various functions.

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14. What does the anterior commisure connect?

The thalamus to the parietal lobe

The hippocampus to the occipital lobe

The olfactory bulb to the temporal lobe

The cerebellum to the frontal lobe

The anterior commisure is a bundle of nerve fibers that connects the two brain hemispheres and specifically connects the olfactory bulb to the temporal lobe. The other options provided do not accurately describe the function of the anterior commisure.

Explanation

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15. What is the cingulate bundle?

A fiber optic internet connection for homes.

A type of pastry filled with cinnamon and sugar.

A pair of white matter tracts underlying the cingulate gyrus. they project to the entorhinal cortex and hippovamus

A type of bundle used for bungee jumping.

The cingulate bundle refers to a specific anatomical structure related to the brain and is not associated with bungee jumping, internet connections, or pastries.

Explanation

The cingulate bundle refers to a specific anatomical structure related to the brain and is not associated with bungee jumping, internet connections, or pastries.

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16. In what context is the subgenual cingulate a targeted site for treatment?

Physical therapy

Deep brain stimulation

Chemotherapy

Antibiotic therapy

The subgenual cingulate is often targeted for deep brain stimulation as a treatment approach for certain psychiatric disorders.

Explanation

The subgenual cingulate is often targeted for deep brain stimulation as a treatment approach for certain psychiatric disorders.

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17. Identify the tract located in the brain.

Arcuate fasciculis

Fasciculus gracilis

Spinothalamic tract

Corticospinal tract

Tracts in the brain are bundles of nerve fibers that carry information from one area to another. The arcuate fasciculis is a tract that connects Wernicke's area and Broca's area in the brain.

Explanation

Tracts in the brain are bundles of nerve fibers that carry information from one area to another. The arcuate fasciculis is a tract that connects Wernicke's area and Broca's area in the brain.

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