Focal Recording of Synaptic Currents from Single Boutons at the<i>Drosophila</i>Larval Neuromuscular Junction
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Bibliographic record
Abstract
Focal recording is an extracellular method for studying synaptic transmission at the Drosophila larval neuromuscular junction (NMJ) designed for the study of synaptic activity of one or a few synaptic boutons rather than the ensemble activity of all the boutons as occurs with intracellular recording or two-electrode voltage-clamp. This is a useful technique for investigating the properties of different motor neurons that innervate the same muscle, applying statistical analysis to discrete synaptic events, and investigating the heterogeneity of synaptic release properties among boutons. A compound microscope with epifluorescent imaging capability is very helpful but not essential; any GFP Drosophila strain that labels the nerve terminal or synaptic boutons can be used to locate the boutons. A particularly useful strain is Mhc-CD8-Sh-GFP, containing a GFP molecule that is expressed in muscle, localizes to the postsynaptic apparatus, and outlines boutons. Vital fluorescent dyes (such as 4-Di-2-Asp) may also be applied to the dissected preparation to help locate boutons. The microscope should be equipped for differential interference contrast (DIC or Nomarski) optics if fluorescence is not used.
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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 | 0.001 |
| 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 | 0.001 |
| 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