kognition vid näringsunderskott

[johan1234]

Hur påverkas de kognitiva förmågorna vid olika näringsunderskott på kort och lång tid?

[Durante]

Vilka näringsunderskott, det beror nog på vad det är du har brist på...? eller menar du kcal-underskott?

Äter du dåligt så märker du väl redan på en dag att din kognition har påverkats?

[Proteinsyntes]

Detta undrar jag med.
Har deffat i 4 månad. Skulle jag fått bättre minne, om jag bulkade?
Har glömt hur man känner sig på bulk..

[Eddie Vedder]

I ett längre persoektiv lär ett för lågt energiintag påverka negativt. I alla fall om underskottet är rejält.

Men akut sjunker inte kognitiv förmåga markant ens efter två dagars svältintag. I alla fall inte då man är omedveten om svältintaget.

Background: Anecdotal information and limited research suggest that short-term caloric deprivation adversely affects cognition. However, this issue has not been studied using double-blind, placebo-controlled procedures, because the formulation of a calorie-deficient feeding regimen identical to one with calories is impossible using ordinary foods. Therefore, test meals varying in caloric content, but indistinguishable in sensory characteristics, were formulated using hydrocolloid-based gels as the principal structural component.

Objective: The purpose of this study was to examine the effects of 2 d of near-total caloric deprivation on cognitive function, satiety, activity, sleep, and glucose concentrations in a controlled environment.

Design: A double-blind, placebo-controlled crossover study of caloric deprivation was conduced in a controlled environment for 48 h. Cognitive function in 27 healthy young subjects was assessed repeatedly with standardized tests of vigilance, reaction time, learning, memory, logical reasoning, mood, and satiety. Wrist-worn monitors were used to assess ambulatory vigilance, activity, and sleep. Interstitial glucose concentrations were assessed continuously with a minimally invasive monitor.

Results: When the subjects received the near calorie-free diets, mean calorie consumption totaled 1311 kJ (313 kcal) over the testing period. During the fully fed treatment sessions, the subjects consumed a mean of 9612 kJ/d (2294 kcal/d), which matched their individual, daily energy requirements. Satiety and interstitial glucose concentrations were lower during the calorie-deprived diet (P < 0.001) than during the fully fed diet. There were no detectable effects of calorie deprivation on any aspect of cognitive performance, ambulatory vigilance, activity, or sleep. The mood states assessed, including fatigue, were not affected by calorie deprivation.

A double-blind, placebo-controlled test of 2 d of calorie deprivation: effects on cognition, activity, sleep, and interstitial glucose concentrations. Am J Clin Nutr. 2008 Sep;88(3):667-76.