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Carley MCQ 30

Topic: Anatomy

Created on Saturday, November 26 2022 by carley

Last modified on Saturday, November 26 2022.

A 42-year-old male presents to your clinic for polyuria after undergoing surgery to remove a tumor near the pituitary gland. What structure was likely damaged during the surgery?

A) Supraoptic nucleus

B) Anterior thalamic nucleus

C) Mammillary bodies

D) Suprachiasmatic nucleus

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This question was created on November 26, 2022 by carley.
This question was last modified on November 26, 2022.

ANSWERS AND EXPLANATIONS

A) Supraoptic nucleus

This answer is correct.

The supraoptic nucleus sits near the optic chiasm and pituitary gland. It is responsible for the production of ADH and oxytocin. Damage here could lead to polyuria. (See References)

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B) Anterior thalamic nucleus

This answer is incorrect.

The anterior thalamic nucleus does not play a role in ADH production and would not cause polyuria if damaged (See References)

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C) Mammillary bodies

This answer is incorrect.

While the mammillary bodies are in the vicinity, they do not play a role in ADH production and a lesion would not lead to polyuria (See References)

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D) Suprachiasmatic nucleus

This answer is incorrect.

The suprachiasmatic nucleus sits above the optic chiasm and is responsible for regulating circadian rhythm, not ADH. (See References)

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References:

1. Nolte, J. (2008). The Human Brain: An Introduction to Its Functional Anatomy, 6th ed. Mosby, St. Louis. (ISBN:0323041310)

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anatomy
Carley MCQ 30
Question ID: 112622030
Question written by carley. (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 11/26/2022
Modified: 11/26/2022
Estimated Permutations: 24