Influence of area 5 on interhemispheric inhibition
Bibliographic record
Abstract
Brodmann's area 5 is implicated in the sensorimotor control of hand movement in humans and nonhuman primates. However, little is known about the influence of area 5 on the neural circuitry within the primary motor cortex that underpins hand control. The present study investigated the neural circuitry of interhemispheric inhibition (IHI) that exists between homologous muscle representations in the motor cortex. Using paired-pulse transcranial magnetic stimulation, IHI was probed from the left-to-right hemisphere and vice versa for the first dorsal interosseous muscle of the hand at short (10 ms) and long (40 ms) latencies before and for up to 1 h after continuous θ-burst stimulation over left hemisphere area 5. The results indicate that continuous θ-burst over area 5 increases IHI at short latencies in the left hand (left-to-right inhibition) from 5-20 and 45-60 min after stimulation. Short latency inhibition in the right hand and bilateral long latency inhibition remain unaltered. The data indicate that area 5 influences the IHI that exists between the representations of the hand muscles. This effect occurs ipsilateral to the left area 5, suggesting that effects are mediated through changes in the excitability of transcallosal neurons originating in the left motor cortex.
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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 | 0.000 |
| 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 | 0.000 |
| 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".