Bibliographic record
Abstract
The transition from wakefulness to NREM sleep is associated with typical signs of brain electrical activity, characterized by prolonged periods of hyperpolarization and increased membrane conductance in thalamocortical (TC) neurons, with the consequence that incoming messages are inhibited and the cerebral cortex is deprived of signals from the outside world. There are three major oscillations during NREM sleep. Spindles are generated within the thalamus, due to thalamic reticular (RE) neurons that impose rhythmic inhibitory sequences onto TC neurons, but the widespread synchronization of this rhythm is governed by corticothalamic projections. There are two types of delta activity: clock-like waves generated in TC neurons by the interplay between two hyperpolarization-activated inward currents; and cortical waves that survive extensive thalamectomy. The hallmark of NREM sleep activity is the slow oscillation, generated intracortically, which has the virtue of grouping the other types of sleep activities, thus leading to a coalescence of different rhythms that can only be observed in intact-brain animals and humans. Far from being epiphenomena, with no functional role, NREM sleep oscillations, particularly spindles and their experimental model augmenting responses, produce synaptic plasticity in target cortical neurons and resonant activity in corticothalamic loops, as in "memory" processes. Upon brain arousal, spindles are blocked by inhibition of RE neurons, the spindles' pacemakers; clock-like delta rhythm is obliterated by depolarization of TC neurons; and the cortically generated slow oscillation is abolished by selective erasure of its hyperpolarizing components. Fast (beta and gamma) oscillations are roduced by the depolarizing effects of mesopontine cholinergic neurons acting on TC neurons and nucleus basalis neurons acting on cortical neurons.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".