Audiovisual interactions in the Cat: Direct cortical projections from the posterior auditory field to primary visual cortex
Bibliographic record
Abstract
Sensory systems do not operate in isolation and must have the ability to influence each other. On a behavioral level, we have been examining the influence of auditory cortex on basic visual functions. Therefore, we are interested in identifying possible pathways that may serve to mediate these interactions. In adult cats ([[gt]]6 months), sources of auditory cortical projections to primary visual cortex (areas 17 & 18) were studied using injections of wheat germ agglutinin conjugated to horseradish peroxidase (WGA-HRP) into areas 17 & 18. In each animal, multiple injections were made into representations of both the central and peripheral visual fields. In agreement with previous studies, characteristic patterns of cell body labeling were identified in extrastriate visual cortex (areas PMLS, PLLS, AMLS, 19, 20, & 21) and the visual thalamus (LGN, MIN, & LPl), thus confirming the efficacy of the tracer injections. Labeled neurons were also identified in the visual area of the anterior ectosylvian sulcus (area AEV). In auditory cortex, of the four tonotopically-organized regions, labeling was identified in the supragranular layers of the posterior auditory field (PAF). Little or no labeling was evident in the primary auditory cortex (AI), the anterior auditory field (AAF), or the ventral posterior auditory field (VPAF). Furthermore, little or no labeling was identified in the remaining nine generally-recognized regions of auditory cortex. Therefore, while no projections originating in AI could be found to terminate in primary visual cortex, projections were identified from non-primary PAF. Interestingly, PAF has been recently identified to play a significant role in the spatial localization of a sound source. Therefore, we propose that the PAF to primary visual cortex audio-visual pathway may serve to enhance or inhibit accurate spatial localization functions in primary visual cortex.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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".