Carbohydrate ingestion but not mouth rinse maintains sustained attention when fasted.
Physiol Behav
; 153: 33-9, 2016 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-26498427
ABSTRACT
UNLABELLED Carbohydrate (CHO) receptors in the mouth signal brain areas involved in cognitive tasks relying upon motivation and task persistence; however, the minimal CHO dose that improves mental activity is unclear. PURPOSE:
To determine if CHO (via ingestion or oral rinse) influences sustained attention without eliciting glycemic responses when in a fasted state.METHODS:
Study A Six healthy adults completed five treatment trials, ingesting 0-6% CHO solutions to evaluate glycemic response. Peak blood glucose for 6% and 1.5% CHO was greater (p<0.05) than 0% and 0.4% CHO; thus, the low 0.4% CHO was evaluated further. Study B Following an overnight fast, ten healthy adults completed three trials in a crossoverdesign:
1) 400 ml 0.4% CHO ingested serially via 25 ml boluses, 2) 375 ml 0% CHO control (CON) ingested followed by one 25 ml 6% CHO isocaloric (1.5 g CHO) mouth rinse, and 3) CON ingest followed by CON rinse. Following treatments, a 20 min Continuous Performance Task (CPT) was performed to assess accuracy and precision.RESULTS:
Accuracy and precision were not different during the first 5 min of CPT. However, accuracy was maintained with CHO ingest (p=1.0) but decreased over 20 min (p<0.05) with both CHO and CON rinse treatments. Precision tended to decline over 20 min CPT with CON (p=0.06) and CHO rinse (p=0.05) but were maintained with CHO ingest (p=1.0). No differences in glycemic responses were observed between treatments.CONCLUSIONS:
Compared to mouth rinsing CON or CHO (1.5 g in 6% CHO), ingestion of an isocaloric low-CHO drink maintained sustained attention over a mentally fatiguing task and appears effective after fasting without eliciting a glycemic response.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Atenção
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Carboidratos da Dieta
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Jejum
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Ingestão de Alimentos
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Antissépticos Bucais
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article