The morphology and variability of the caudal rami of the superior temporal sulcus
Bibliographic record
Abstract
The caudal branches of the superior temporal sulcus (cSTS) have been difficult to characterize because of the considerable degree of morphological variability across individuals. Leading atlases of the human brain are inconsistent with each other in terms of the number of branches identified and the nomenclature used to refer to them. Examination of the magnetic resonance images (MRIs) of 45 human brains (90 hemispheres) demonstrates three branches of the cSTS that ascend into the inferior parietal lobule: an anterior branch (cSTS1), a central branch (cSTS2) and a posterior branch (cSTS3). The cSTS1 is found immediately posterior to the ascending limb of the Sylvian fissure, followed by the cSTS2, and then the last branch, cSTS3, at the parieto-occipital junction. The temporal part of the STS joins most frequently with the cSTS2 (approximately 60% of cases), the cSTS1 (approximately 30% of cases) and least frequently with the cSTS3 (approximately 10% of cases). At the temporo-occipital junction, there is another sulcus that is related to the STS, the ventral anterior occipital sulcus (AOCS-v), a sulcus that has been functionally linked to area MT/v5 in the human brain. While the STS may appear to join AOCS-v from the surface of the brain, it can be established from examination of the depth of the sulci that they are not continuous. The variability in location of each one of the cSTS branches is expressed quantitatively in the MNI standard proportional stereotaxic space.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".