Identification of a noradrenaline‐rich subdivision of the human nucleus accumbens
Bibliographic record
Abstract
The nucleus accumbens, situated at the junction between rostral pre-commissural caudate and putamen, is now considered to be critically involved in rewarding and motivational functions mediated by the neurotransmitter dopamine. However, in the human, the precise anatomical boundaries of this nucleus are still undetermined and controversy exists as to the extent to which nucleus accumbens activity is controlled by noradrenaline, a related neurotransmitter now much neglected (in favor of dopamine) by the scientific community. Here we resolve the question of noradrenaline in the human nucleus accumbens and identify, in autopsied brain of normal subjects, a small subdivision of the caudomedial portion of this nucleus that selectively contains strikingly high levels of noradrenaline and thus represents the only area in human brain having equally high levels of both noradrenaline and dopamine. The presence of very high, localized noradrenaline concentrations in the caudomedial nucleus accumbens implies a special biological role for this neurotransmitter in human brain motivational processes.
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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 | 0.001 | 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".