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Record W2557644522

The neuronal mechanisms of overeating of sweet palatable food

2013· article· en· W2557644522 on OpenAlexaff
Elena Timofeeva

Bibliographic record

VenueJournal of Nutrition & Food Sciences · 2013
Typearticle
Languageen
FieldNeuroscience
TopicRegulation of Appetite and Obesity
Canadian institutionsUniversité Laval
Fundersnot available
KeywordsOvereatingEndocrinologyHypothalamusInternal medicineNucleus accumbensCorticosteroneLateral hypothalamusSucrosePrefrontal cortexBrain stimulation rewardDietary SucroseNeuroscienceChemistryBiologyMedicineObesityHormoneCentral nervous systemFood science
DOInot available

Abstract

fetched live from OpenAlex

O research is focused on the brain mechanisms triggering overeating of palatable sweet foods and the neuronal and metabolic consequences of this overeating. To investigate the molecular, neuronal and metabolic aspects of sweet diets, we use the rat models subjected to the diets containing palatable sweet ingredients. Our experiments show that intake of the sweet palatable food by rats exponentially increases in spite of detrimental metabolic consequences which include accumulation of fat and development of obesity. In the brain, repeated consumption of sucrose displaced the neuronal pre-prandial activity from the medial hypothalamic region, the dorsomedial hypothalamic nucleus (DMH) and the paraventricular hypothalamic nucleus (PVN), to the brain arias involved in reward, the nucleus accumbens (Acb) and the prefrontal cortex (PF). Suppression of activity of the medial hypothalamus by sucrose was confirmed in the experiments testing the effects of consumption of sucrose on the reaction to restraint stress in rats. The animals with a given choice to consume sucrose along with rat chow provided ad libitum showed lower expression of the mRNA of a stress neurohormone, corticotropin-releasing factor, in the PVN and lower levels of plasma corticosterone in response to 1-h stress session. Therefore, consumption of sucrose may dampen the neuronal and hormonal response to stress that explains why sweets may be consumed as ‘comforting’ food. On the other hand, displacement of neuronal pre-prandial activity from the medial hypothalamus to the reward areas by sucrose suggests that regulation of sucrose intake may escape from the homeostatic control.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.001
Threshold uncertainty score0.003

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

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.

Opus teacher head0.040
GPT teacher head0.259
Teacher spread0.220 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

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".

Quick stats

Citations0
Published2013
Admission routes1
Has abstractyes

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