Which structure forms most of the lateral walls of the third ventricle and is part of the diencephalon?

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Multiple Choice

Which structure forms most of the lateral walls of the third ventricle and is part of the diencephalon?

Explanation:
The thalamus forms the majority of the lateral boundaries of the third ventricle, sitting on either side of this midline cavity within the diencephalon. The third ventricle lies between the two thalami, while the hypothalamus forms the floor, and the pineal gland sits posteriorly as part of the epithalamus. The hippocampus is a limbic structure in the temporal lobe, not part of the diencephalon. So, the thalamus is the structure that best fits the description.

The thalamus forms the majority of the lateral boundaries of the third ventricle, sitting on either side of this midline cavity within the diencephalon. The third ventricle lies between the two thalami, while the hypothalamus forms the floor, and the pineal gland sits posteriorly as part of the epithalamus. The hippocampus is a limbic structure in the temporal lobe, not part of the diencephalon. So, the thalamus is the structure that best fits the description.

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