Two-Photon Fluorescence Microscopy of Cerebral Hemodynamics
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Under physiological conditions, neuronal activity is tightly coupled to hemodynamics of the surrounding microvessels. Conversely, most brain diseases are associated with a disturbance in neurovascular coupling. Measuring the hemodynamic response of the microvascular network to neuronal stimulation in vivo involves two major challenges: maintaining a stable systemic physiological state in the animal and imaging with sufficient temporal and spatial resolution to capture the hemodynamic changes across the three-dimensional cortical microvascular network. Two-photon fluorescence microscopy allows imaging of intact cortex in situ at micrometer spatial and microsecond temporal resolution. However, this modality necessitates focal opening of the skull because of its high scattering of light waves. This protocol describes in detail the requisite surgical preparation and physiological maintenance of an adolescent rat with a closed cranial window. Two-photon fluorescence laser scanning microscopy is then used to image the hemodynamic response of the microvasculature of the primary somatosensory cortex to electrical stimulation of the forepaw, with the end goal of quantitative analysis of brain hemodynamics.
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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 | 0.001 |
| 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 it