Examkin

Question

Difficulty: Very hardCentral Ideas

For decades, cognitive scientists adhered to a strict modularity hypothesis, which posited that specific brain regions are genetically hardwired for dedicated, singular functions. However, neuroscientist Linda Wilbrecht and colleagues have demonstrated that neural circuits initially associated with basic sensory processing are routinely co-opted to support complex cognitive tasks, such as decision-making under uncertainty. This phenomenon of 'neural reuse' suggests that the brain's functional architecture is not a collection of static, specialized compartments, but rather a highly flexible system that dynamically repurposes existing evolutionary structures. Consequently, cognitive models that rely on rigid localization of cognitive faculties fail to capture the fluid, overlapping neural networks that actually facilitate human thought.

Which choice best states the main idea of the text?

  1. Research into neural reuse indicates that the brain is a highly flexible system that repurposes existing circuits for diverse tasks, thereby challenging cognitive models based on rigid functional modularity.Answer
  2. B
    Sensory processing circuits in the brain are genetically programmed to eventually transition into decision-making centers as an individual matures.
  3. C
    The human brain is a highly complex organ that has evolved over millions of years to adapt to sensory environments and process various forms of decision-making.
  4. D
    Because neural circuits are highly dynamic, cognitive scientists will soon be able to map how the brain processes decisions in order to predict human choices.

Answer

Research into neural reuse indicates that the brain is a highly flexible system that repurposes existing circuits for diverse tasks, thereby challenging cognitive models based on rigid functional modularity.
The correct option accurately identifies the main idea by explaining how research into neural reuse challenges the traditional modularity hypothesis, demonstrating instead that the brain is a flexible, dynamic system that repurposes existing circuits.

Step-by-Step Solution

1
Analyze the structure of the passage to identify the central claim.
The passage introduces a traditional theory (strict modularity) and contrasts it with new evidence (neural reuse) showing that the brain dynamically repurposes circuits.
Identifying the transition from the old view to the new research helps isolate the author's primary argument.
2
Evaluate the implications of the new evidence presented in the text.
The author concludes that rigid localization models fail to capture the fluid and overlapping networks that facilitate thought.
This conclusion represents the main point that the author is building toward throughout the text.
3
Compare the candidate options with the identified main idea.
The choice highlighting neural reuse as a challenge to modularity aligns with the passage's full scope, whereas other choices present misreadings, speculative inferences, or overly broad generalizations.
Ensuring the selected choice encapsulates the text's primary thesis while avoiding common distractors leads to the correct answer.

Key Concept

Identifying the central idea of an academic passage by analyzing how new research challenges an established hypothesis.
Rate this question

Topics

Central Ideas

More questions from this topic