The Ability to Smell Remains Intact, But Does Not Recover, After Olfactory Bulb Lesions
Bibliographic record
Abstract
We examined two unresolved issues regarding the influence of olfactory bulb lesions on the ability to smell. First, we asked whether the sense of smell remains intact or recovers after incomplete and complete removal of both olfactory bulbs and second, whether the qualitative perception of smell changes after lesion. Rats were trained to perform a four-choice olfactory discrimination task and were subsequently prepared with either medium, large, or complete bilateral olfactory bulb lesions. They were retested after a recovery period of either 6 or 22 weeks. The lesion effect depended on lesion size, and not on recovery interval. Animals with complete lesions showed no retention, and a failure to relearn, regardless of the recovery interval. Animals with incomplete lesions showed virtually perfect retention. These results, therefore, indicate first that the sense of smell remains intact following extensive olfactory bulb lesions, and that a previously acquired discrimination is permanently lost after complete olfactory bulb lesions.
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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 | 0.005 |
| 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 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".