Antidepressant effects of exercise: Evidence for an adult-neurogenesis hypothesis?
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
It has been hypothesized that a decrease in the synthesis of new neurons in the adult hippocampus might be linked to major depressive disorder (MDD). This hypothesis arose after it was discovered that antidepressant medications increased the synthesis of new neurons in the brain, and it was noted that the therapeutic effects of antidepressants occurred over a time span that approximates the time taken for the new neurons to become functional. Like antidepressants, exercise also increases the synthesis of new neurons in the adult brain: a 2-3-fold increase in hippocampal neurogenesis has been observed in rats with regular access to a running wheel when they are compared with control animals. We hypothesized, based on the adult-neurogenesis hypothesis of MDD, that exercise should alleviate the symptoms of MDD and that potential mechanisms should exist to explain this therapeutic effect. Accordingly, we evaluated studies that suggest that exercise is an effective treatment for MDD, and we explored potential mechanisms that could link adult neurogenesis, exercise and MDD. We conclude that there is evidence to support the hypothesis that exercise alleviates MDD and that several mechanisms exist that could mediate this effect through adult neurogenesis.
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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 | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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 it