Neurophysiology and special senses: limbic system: practice question

A Physiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Physiology · Neurophysiology and special senses: limbic system

Sample item

After bilateral anterior temporal lobe resection, a monkey becomes placid, puts objects in its mouth and shows hypersexual behaviour. Which structure's loss mainly explains this?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Amygdala

Bilateral amygdala lesions produce the Kluver-Bucy syndrome of placidity, hyperorality, hypersexuality and visual agnosia. Hippocampal damage mainly impairs memory formation, and septal lesions cause rage.

Option by option

  • A. Amygdala (correct)

    Correct. Amygdala loss gives Kluver-Bucy syndrome.

  • B. Cingulate gyrus

    Cingulate lesions cause apathy and akinetic mutism.

  • C. Hippocampus

    Hippocampal damage causes anterograde amnesia rather than this behaviour.

  • D. Septal nuclei

    Septal lesions are associated with rage and aggression.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is A, Amygdala. Bilateral amygdala lesions produce the Kluver-Bucy syndrome of placidity, hyperorality, hypersexuality and visual agnosia.

Why is "Cingulate gyrus" not the answer?

Cingulate lesions cause apathy and akinetic mutism.

Why is "Hippocampus" not the answer?

Hippocampal damage causes anterograde amnesia rather than this behaviour.

Why is "Septal nuclei" not the answer?

Septal lesions are associated with rage and aggression.

What concept does this question test?

It tests Neurophysiology and special senses: limbic system in Physiology. Hippocampal damage mainly impairs memory formation, and septal lesions cause rage.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Neurophysiology and special senses: limbic system?

For each system, sketch the key graph (pressure–volume loop, oxygen dissociation curve, nephron handling) and explain it aloud. Then use the flashcards and the other Physiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.