Chronic morphine exposure and maternal separation induce impairments in cognition and locomotor activity of male adolescent rats
Bibliographic record
Abstract
Maternal morphine exposure reduces motivation for basic cognitive tasks, followed by executive function deficits in attention and accuracy. It also induces depression-like behaviors and has negative consequences for learning and memory in offspring. Interaction between mothers and pups has a crucial effect on the mammal's development. Maternal separation (MS) can originate behavioral and neuropsychiatric abnormalities later in life. It seems that adolescents are more susceptible to the effects of early-life stress; Therefore, this study aimed to evaluate the effects of chronic morphine consumption (21 days before and after mating and gestation) and MS (180 min/day from postnatal day [PND] 1-21) on the cognitive and behavioral performance of male offspring in mid-adolescence. Six groups, including control, MS, V (vehicle), morphine, V+MS, and morphine+MS, were tested for open field (OF), novel object recognition (NOR), and the Morris water maze (MWM). The results of the OF test showed that MS increased locomotor activity and movement velocity. Inner and outer zone durations did not differ among groups. The body stretching of the morphine+MS rats was significantly more than the MS rats. Moreover, the MS and morphine+MS groups showed significantly less sniffing behavior in the OF test. The MS group showed deficits in spatial learning in the MWM test, but recognition memory in the NOR and spatial memory in the MWM tests were not significantly different among groups. We concluded that MS could induce impairments in spatial learning and locomotor activity that could be worsened by maternal morphine exposure in adolescent male rats.
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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 | 0.000 | 0.000 |
| 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 | 0.000 |
| Open science | 0.000 | 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".