Effects of repeated electroconvulsive shocks on catecholamine systems: Electrophysiological studies in the rat brain
Bibliographic record
Abstract
Electroconvulsive therapy (ECT) treats depression by repeated administration of seizure-inducing electrical stimuli. To assess the effects of repeated electroconvulsive shocks (ECSs), an animal model of ECT on monoamine transmission, Sprague-Dawley rats were administered 6 ECS over 2 weeks and in vivo single-unit extracellular electrophysiological recordings were obtained 48 h after the final ECS. Overall firing activity of dopamine (DA) neurons in the ventral tegmental area was unchanged following repeated ECS. In the locus coeruleus (LC), the burst activity of norepinephrine (NE) neurons was increased while population activity was decreased after ECS. In the substantia nigra pars compacta (SNc), there were more spontaneously active neurons, suggesting greater DA tone in the nigrostriatal motor pathway, which may contribute to an alleviation of motor retardation. In the facial motor nucleus (FMN), facilitation of electrophysiological activity by serotonin (5-HT), and NE was determined to be through the 5-HT2C receptor and α1 -adrenoceptor, respectively. Locally administered NE, but not 5-HT, facilitated glutamate-induced firing following repeated ECS, which may contribute to improved motor function. These results showed that repeated ECS enhance DA activity in the SNc and NE transmission in the FMN, which could be a part of the mechanism behind the alleviation of depressive symptoms, including motor retardation, by ECT.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 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".