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[A1CR]

The paper below's results may represent to me what may
represent difficulties with correct thinking when we fast.

Doniger GM, Simon ES, Zivotofsky AZ
Comprehensive computerized assessment of cognitive sequelae
of a complete
12-16 hour fast.

Behav Neurosci. 2006 Aug;120(4):804-16.
PMID: 16893286 http://tinyurl.com/gg7k2

... shifts in cognition attributable to short-term
religious fasting.
Multiple cognitive domains were evaluated at midday and late
afternoon
following complete abstention from eating and drinking
beginning at
midnight. Cross-domain, fasting-related deficits were found
for tasks
requiring perception of spatial relations. Fasting-related
information
processing deficits were found for response time but not
accuracy for test
levels of intermediate difficulty. Time-of-day effects often
reflected
poorer afternoon performance. .