Development of the representation of auditory space in the superior colliculus of the rat
Bibliographic record
Abstract
The aims of the present study were, first, to determine the time of the emergence of the topographic map in the superior colliculus (SC) of the rat and, second, to examine the spatial changes in auditory neurons' receptive fields (RFs) throughout the developmental period. For these purposes, recording sessions were conducted on rats of different age groups (P15-18; P21-24; P27-29 and P60-80). Results show that SC auditory neurons' RFs go through multiple changes during early development before the establishment of the adult-like auditory topographic map (P27). These modifications include, first, the refining of directional RFs tuning between P18 and P27 and, second, a shift of sensitivity towards 90 degrees in the contralateral hemispace after P15-18. In addition, data indicate that the neuronal response latencies are shorter in the adult group than in the P15-18 or P21-24 groups. Finally, a diminution in spontaneous firing rate was observed between the P15-18 group and the P60-80 group. The results of the present study revealed that the neural organization representing auditory space in the deep layers of the SC of the rat is not innate, but rather emerges at about P27-29. Moreover, they bring new evidence supporting a two-step process involved in the development of the representation of auditory space. Hence, the development of the auditory space representation follows a logical temporal maturation sequence whereby the RF organization must be completed before a stable topographic map can be formed.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".