[esnr] Antw: Re: NFB and fasting

  • From: JefCrotty@xxxxxx
  • To: esnr@xxxxxxxxxxxxx
  • Date: Sat, 16 Oct 2004 16:29:45 EDT

..............short fasting might even help the brain learn:

The effects of food deprivation and incentive motivation on blood glucose 
levels and cognitive function.

Psychopharmacology (Berl). 1997 Nov;134(1):88-94.

Green MW, Elliman NA, Rogers PJ.

Consumer Sciences Department, Institute of Food Research, Reading, UK.

The current study investigated the relationships between blood glucose 
levels, mild food deprivation, sympathetic arousal, and cognitive processing 
efficiency. Subjects (n = 82) were randomly assigned to four experimental 
comprising combined manipulations of food deprivation and incentive 
motivation. Baseline and mid-session measurements of blood glucose, blood 
pressure and 
pulse rate were taken. Subjects completed a number of measures of cognitive 
processing efficiency and self report measures of affective and somatic state. 
Although glucose levels were lowered following food deprivation, there was no 
significant detrimental effect of food deprivation on task performance. 
However, improved recognition memory processing times were associated with 
. Incentive motivation was associated with faster simple reaction times and 
higher diastolic blood pressure. There were no significant relationships 
between glucose levels and task performance, further supporting the hypothesis 
the brain is relatively invulnerable to short food deprivation.

Food deprivation induced parallel changes in blood glucose, plasma free fatty 
acids and feeding during two parts of the diurnal cycle in rats.

Neurosci Biobehav Rev. 1980;4 Suppl 1:17-23.

Le Magnen J, Devos M, Larue-Achagiotis C.

The changes in plasma glucose and free fatty acid levels and in subsequent 
feeding induced by 4 to 10 hr of food deprivation were investigated in rats and 
compared for the two parts of the diurnal cycle. It was found that increasing 
fast duration at night induced a more rapid fall of plasma glucose and 
elevation of plasma free fatty acids than in the day. However, a similar 
increment of 
the first post fast meal was elicited by an identical decrement of blood 
glucose level for the two periods except after a 10 hr fast during the day. The 
acute effect of darkness and light per se being experimentally excluded, it was 
concluded that the size of the first meal following short term food 
deprivation was dependent throughout the diurnal cycle on the fast induced 

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