Related Experiment Video
Updated: Jul 16, 2026
10:32
Hippocampal Insulin Microinjection and In vivo Microdialysis During Spatial Memory Testing
Published on: January 11, 2013
17.1K
Declining Blood Glucose Levels after a Cognitively Demanding Task Predict Subsequent Memory
1a Department of Psychology , University of Wales Swansea , Swansea SA2 8PP , Wales , UK.
Nutritional Neuroscience
|July 15, 2016
Summary
Declining blood glucose levels enhance memory and reduce errors during cognitive tasks. This effect is observed only when individuals are under cognitive demand, not during rest.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Human Physiology
Background:
- Previous research suggests a link between falling blood glucose levels and improved cognitive function.
- The precise conditions under which this association occurs remain unclear.
Purpose of the Study:
- To investigate if declining blood glucose levels enhance memory specifically under cognitive demand.
- To examine the relationship between blood glucose changes and performance on a vigilance task.
Main Methods:
- Participants consumed either a placebo or a glucose drink.
- Subjects then either rested or performed a vigilance task.
- Memory recall for a word list was assessed.
- Blood glucose levels were monitored.
Main Results:
- Memory performance improved in participants who performed the vigilance task and consumed a glucose drink, correlating with more significant blood glucose drops.
- Fewer errors were made on the vigilance task by individuals with more pronounced blood glucose declines.
- No significant association between falling blood glucose and memory was found in the resting condition.
Conclusions:
- Declining blood glucose levels can enhance memory and task performance, but only when cognitive demand is present.
- Cognitive demand appears to be a critical moderator of the relationship between blood glucose and cognitive function.
More Related Videos
08:01A Method for Manipulating Blood Glucose and Measuring Resulting Changes in Cognitive Accessibility of Target Stimuli
Published on: August 12, 2016
9.6K
07:01Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
Published on: September 20, 2020
5.3K
Related Concept Videos
01:18Metabolic States of the Body: The Postabsorptive State
The postabsorptive state usually starts about four hours after a meal and lasts until the next meal is eaten. During this time, the digestive system stops absorbing nutrients, and the body uses stored energy reserves to maintain stable blood glucose levels.
Initially, glycogen stored in the liver is broken down to release glucose into the bloodstream, while glycogen in the muscles is broken down to supply glucose for energy directly within the muscle cells. As glycogen stores diminish,...
Initially, glycogen stored in the liver is broken down to release glucose into the bloodstream, while glycogen in the muscles is broken down to supply glucose for energy directly within the muscle cells. As glycogen stores diminish,...
01:15Hypoglycemia and Glucagon
Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
01:14Role of Cerebellum and Prefrontal Cortex in Memory
The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the cerebellum's...
01:16Interference and Decay
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
01:30Cognitive Development During Adulthood
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
01:26Hypoglycemia
Hypoglycemia is a blood glucose level below 70 mg/dL. It commonly occurs in individuals using insulin or insulin-secreting drugs, but may also arise in non-diabetic conditions. People with type 1 diabetes are at the highest risk because they depend on exogenous insulin. People with type 2 diabetes are also at risk, especially when treated with insulin or medications such as sulfonylureas, which increase insulin release regardless of blood glucose levels. It develops when insulin levels exceed...