Related Experiment Video
Updated: Jul 10, 2026
11:01
Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
Published on: August 30, 2011
Structure-function interactions of correct retrieval in healthy elderly women
Stefanie Brassen1, Christian Büchel, Wolfgang Weber-Fahr
1NeuroImage Nord, Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. sbrassen@uke.uni-hamburg.de
Neurobiology of Aging
|November 21, 2007
Summary
Aging brains show altered word recognition. Reduced frontal activation and increased middle temporal gyrus (MTG) activation in older adults are linked to structural brain changes, suggesting a two-step interaction for memory retrieval.
Area of Science:
- Neuroscience
- Cognitive Aging Research
- Neuroimaging
Background:
- Aging is associated with complex changes in brain structure and function.
- Understanding how these changes impact cognitive processes like memory retrieval is crucial.
Purpose of the Study:
- To investigate the relationship between brain activation and structural alterations during memory retrieval in aging.
- To explore how functional and structural MRI data can elucidate age-related cognitive changes.
Main Methods:
- Combined functional MRI (fMRI) and structural MRI in healthy young and older women.
- Assessed brain activation patterns during word recognition tasks (correct vs. incorrect).
- Correlated brain activation with gray matter density in specific brain regions.
Main Results:
- Older adults showed decreased right prefrontal cortex (PFC) and increased middle temporal gyrus (MTG) activation during correct word recognition.
- Performance correlated with PFC activation in younger adults and MTG activation in older adults.
- Reduced gray matter density in PFC and medial temporal lobe (MTL) was associated with altered activation patterns.
Conclusions:
- A two-step structure-function interaction underlies successful memory retrieval in healthy aging.
- Age-related gray matter loss leads to diminished frontal activation and compensatory MTG activation.
- Effective compensatory resource utilization depends on preserved structural integrity in the PFC and MTL.
Related Concept Videos
01:12Retrieval
Retrieval is the process of getting information out of memory storage and back into conscious awareness. This ability is essential for daily tasks like brushing hair and teeth, driving to work, and performing job duties. Retrieval occurs in three ways: recall, recognition, and relearning.
Recall involves accessing information without cues, such as during an essay test, where individuals must retrieve facts and concepts from memory unaided. Another example is remembering the name of a colleague...
Recall involves accessing information without cues, such as during an essay test, where individuals must retrieve facts and concepts from memory unaided. Another example is remembering the name of a colleague...
01:45ER Retrieval Pathway
In the secretory pathway, vesicles transport proteins from one cellular compartment to another in forward transport to deliver the protein to its correct location. Occasionally, misfolded proteins and incorrect proteins escape their original compartments, and a retrieval pathway is used to return the escaped proteins to their original compartment.
The ER uses many checkpoints to prevent the entry of incorrectly folded or a resident protein as cargo onto a transport vesicle. These mechanisms...
The ER uses many checkpoints to prevent the entry of incorrectly folded or a resident protein as cargo onto a transport vesicle. These mechanisms...
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,...
01:23Storage
A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze each...
01:15Drug Dosing: Geriatric Patients
Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
01:29Bone Disorders
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...