Do new neurons have a functional role in the adult hippocampus?
Bibliographic record
Abstract
Although the existence of adult neurogenesis in the dentate gyrus is now almost universally accepted, it is not widely established that the new neurons perform any necessary function. However, evidence indicates that the number of new neurons that are generated and form functional synapses is clearly large enough to impact the circuitry of the hippocampus. Additionally, several treatments show parallel effects on neurogenesis and hippocampus-dependent behaviors, suggesting a possible causal relationship between new neurons and hippocampal function. Most importantly, several recent studies have found that killing or inhibiting proliferation of granule cell precursors impairs performance on several hippocampus-dependent tasks. Control experiments showing no impairment on slightly different behavioral tests suggest that the deficits are highly specific and unlikely to result from side effects of the neurogenesis-inhibiting treatments. In summary, the evidence to date strongly suggests that adult neurogenesis in the dentate gyrus plays a vital role in hippocampal function.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".