Theta phase precession beyond the hippocampus
Bibliographic record
Abstract
The spike timing of spatially tuned cells throughout the rodent hippocampal formation displays a strikingly robust and precise organization. In individual place cells, spikes precess relative to the theta local field potential (6-10 Hz) as an animal traverses a place field. At the population level, theta cycles shape repeated, compressed place cell sequences that correspond to coherent paths. The theta phase precession phenomenon not only has afforded insights into how multiple processing elements in the hippocampal formation interact, but is also believed to facilitate hippocampal contributions to rapid learning, navigation, and lookahead. However, theta phase precession is not unique to the hippocampus, suggesting that insights derived from hippocampal phase precession could elucidate processing in other structures. In this review, we consider the implications of extrahippocampal phase precession in terms of mechanisms and functional relevance. We focus on phase precession in the ventral striatum (vStr), a prominent output structure of the hippocampus in which phase precession systematically appears in the firing of reward-anticipatory 'ramp' neurons. We outline how ventral striatal phase precession can advance our understanding of behaviors thought to depend on interactions between the hippocampus and the vStr, such as conditioned place preference and context-dependent reinstatement. More generally, we argue that phase precession can be a useful experimental tool in dissecting the functional connectivity between the hippocampus and its outputs.
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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 | 0.008 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.000 | 0.005 |
| Science and technology studies | 0.001 | 0.003 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.009 | 0.001 |
| Research integrity | 0.000 | 0.003 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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".