Activation of the supramammillary-dentate gyrus circuit enhances alertness and cognitive function in a rat model of ADHD
Bibliographic record
Abstract
Attention Deficit Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by inattention, hyperactivity, and impulsivity, with growing evidence suggesting hypoalertness as a contributing factor to its associated cognitive impairments. Despite promising results from behavioral interventions employing external stimuli to improve cognitive function, the underlying neural mechanisms remain inadequately understood. Here, we identify the supramammillary nucleus (SuM) as a critical neural substrate involved in modulating alertness and cognitive deficits associated with ADHD. We show that hypoactivity of SuM neurons correlates with reduced alertness and impaired recognition using a rat ADHD model. We further demonstrate that SuM neurons influence recognition through projections to the dentate gyrus (DG), primarily by facilitating long-term depression (LTD) within this pathway. Importantly, chemogenetic and optogenetic activation of the SuM-DG circuit resulted in significant enhancement of alertness and restoration of cognitive performance in ADHD rats, aligning their cognitive function with that of control animals. These findings elucidate a pivotal role for the SuM-DG pathway in mediating cognitive deficits related to hypoalertness in ADHD, offering mechanistic insights into the efficacy of alertness-enhancing interventions and highlighting novel therapeutic targets for ADHD treatment.
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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".