Glucose enhancement of memory depends on initial thirst.
This double-blind, placebo-controlled study examined the influence of appetitive state on glucose enhancement of memory. Participants rated their mood, hunger and thirst, then consumed a 25 g glucose drink or a matched placebo 20 min prior to a verbal memory task. There was a double dissociation when the effects of thirst ratings and drink on subsequent memory performance were considered. Those who were initially less thirsty recalled significantly more words following glucose than placebo; those who were more thirsty recalled significantly fewer words after glucose than placebo. Glucose enhancement of memory may therefore critically depend on participants' initial thirst.
Scholey
Andrew B
AB
NICM Centre for Study of Natural Medicines and Neurocognition, Brain Sciences Institute, Swinburne University, Melbourne VIC 3122, Australia. andrew@scholeylab.com
Sünram-Lea
Sandra I
SI
Greer
Joanna
J
Elliott
Jade
J
Kennedy
David O
DO
D000328:Adult; D000339:Affect / Q000502:physiology; D001628:Beverages; D004311:Double-Blind Method; D005947:Glucose / Q000008:administration & dosage*; D006801:Humans; D006815:Hunger / Q000502:physiology; D008568:Memory / Q000187:drug effects*; D010919:Placebos; D013894:Thirst / Q000502:physiology*
D010919:Placebos; D005947:Glucose