Behavioural and cerebrovascular changes following acute visual deprivation
Bibliographic record
Abstract
The current study sought to investigate the effects of short-term (two-hour) visual deprivation on proprioception mediated movement planning/control and the associated cerebral blood flow (CBFv). In Experiment 1, visual deprivation was used to differentiate proprioception from vision by having participants perform a series of grasping tasks, both prior to and post deprivation. Participants were instructed to grasp a target under both vision and no-vision conditions while kinematic measurements were obtained. During visual deprivation, subjects participated in tactile discrimination tasks to promote proprioceptive plasticity. In Experiment 2, visual deprivation was used to determine how the neurovascular system responds to such deprivation. Transcranaial Doppler (TCD) ultrasound was used to attain CBFv measures for both the posterior cerebral artery (PCA) and the middle cerebral artery (MCA); neurovascular coupling protocols were used pre/post deprivation. Experiment 1 indicated augmented use of proprioception for motor planning, but less so for motor control of reaching and grasping strategies following acute visual deprivation. Experiment 2 indicated dramatic changes in CBFv, in both cerebral arteries, during and post deprivation, suggesting the brain undergoes a series of haemodynamic changes when vision is deprived.These results conform to findings that sensory deprivation is associated with plasticity and behavioral changes (Merabet &Pascual-Leone, 2010). Acknowledgments: NSERC, CFI, BCKDF
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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 | 0.000 | 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) | 0.000 | 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".