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Question

Difficulty: MediumRole in Argument

Neuroscientist: It is widely believed that memory consolidation occurs solely during rapid eye movement (REM) sleep. However, this consensus overlooks crucial neural dynamics. Recent neuroimaging reveals that slow-wave sleep generates high-frequency hippocampal ripples that transfer encoded information to the neocortex. Because the neocortex is the brain's long-term storage repository, this synaptic dialogue during slow-wave sleep is essential for stabilizing declarative memories. Hence, REM sleep cannot be the exclusive period during which memories are consolidated.

Which one of the following most accurately describes the role played in the neuroscientist's argument by the claim that the synaptic dialogue during slow-wave sleep is essential for stabilizing declarative memories?

  1. A
    It is the main conclusion of the argument, which is supported by the assertion that REM sleep is not the exclusive period of consolidation.
  2. B
    It is a concession introduced to acknowledge that the traditional view regarding REM sleep remains partially accurate.
  3. It is an intermediate conclusion supported by evidence about hippocampal ripples and used to support the claim that memory consolidation is not limited to REM sleep.Answer
  4. D
    It is an unevidenced premise that serves as the starting point for establishing the general role of the neocortex.
  5. E
    It is an illustration intended to establish that slow-wave sleep is more vital for memory consolidation than REM sleep.

Answer

It is an intermediate conclusion supported by evidence about hippocampal ripples and used to support the claim that memory consolidation is not limited to REM sleep.
The statement that synaptic dialogue during slow-wave sleep is essential for memory stabilization is inferred from the factual premises regarding hippocampal ripples and neocortical storage. In turn, this finding provides the direct evidentiary support needed to conclude that REM sleep is not the exclusive window for memory consolidation. Therefore, it functions precisely as an intermediate (subsidiary) conclusion.

Step-by-Step Solution

1
Identify the main conclusion and structural components of the stimulus.
The main conclusion is the final sentence: 'REM sleep cannot be the exclusive period during which memories are consolidated.' The opposing viewpoint is that memory consolidation occurs solely during REM sleep.
Determining the primary claim the author seeks to establish is necessary to evaluate the functional roles of supporting claims.
2
Analyze the immediate support relationships surrounding the targeted statement.
The targeted statement ('this synaptic dialogue during slow-wave sleep is essential for stabilizing declarative memories') is derived from two premises: (1) hippocampal ripples transfer information to the neocortex, and (2) the neocortex is the long-term storage repository.
A claim that receives support from premises is itself a conclusion.
3
Determine how the targeted statement relates to the main conclusion.
Because stabilizing declarative memories during slow-wave sleep means consolidation happens outside REM sleep, this intermediate conclusion directly supports the main conclusion.
A statement that is supported by premises and in turn supports the main conclusion functions as an intermediate (subsidiary) conclusion.

Key Concept

Distinguishing intermediate conclusions from main conclusions and basic premises
Estimated Time:1m 15s
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Role in Argument

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