Diverse interneuron populations have highly specific interconnectivity in the rat piriform cortex
Bibliographic record
Abstract
Previous studies have suggested that the patterns of innervation and high interconnectivity of the piriform cortex (PC) provide for strong olfactory hippocampal memory; however, these same attributes may create high seizurogenic tendencies. Thus, understanding this wiring is important from a physiological and pathophysiological perspective. Distinct interneurons expressing differing calcium binding proteins (CBPs), parvalbumin (PV), calbindin (CB), and calretinin (CR), have been shown to exist in PC. However, a comprehensive examination of the distribution and innervation patterns of these neurons has not been done. Thus the purpose of this study was to combine the analysis of the CBP cell localization with analysis of their innervation patterns. Each type was differentially localized in the three layers of the PC. Only CR-positive neurons were found in layer 1. PV and CB are coexpressed in layers 2-3, most expressing both PV and CB. A morphological estimate of the dendritic extent for each subtype showed that PV and PV/CB cells demonstrated equally wide, horizontal and vertical arborizations, whereas CB cells had wide horizontal and restricted vertical arborizations. CR cells had restricted horizontal and very long vertical arborizations. Postsynaptic morphological targeting was also found to be specific, namely, PV(+) and PV/CB(+) nerve terminals (NTs) innervate perisomatic regions of principal cells. CR(+) NTs innervate only dendrites of principal cells, and CB(+) NTs innervate both somata and dendrites of principal cells. These data show highly complex innervation patterns for all of the CBP interneurons of the PC and form a basis for further studies in the plasticity of this region.
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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 | 0.001 | 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 | 0.001 |
| 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".