Related Experiment Video
Updated: Jul 3, 2026
10:13
Assessment of Age-related Changes in Cognitive Functions Using EmoCogMeter, a Novel Tablet-computer Based Approach
Published on: February 14, 2014
The relationship between aging, performance, and the neural correlates of successful memory encoding
Sandrine Duverne1, Shahab Motamedinia, Michael D Rugg
1Center for the Neurobiology of Learning and Memory, UC Irvine, Irvine, CA 92697, USA. Sandrine.Duverne@univ-provence.fr
Cerebral Cortex (New York, N.Y. : 1991)
|July 26, 2008
Summary
Older adults show similar brain activity to younger adults during memory encoding, even with poorer performance. Right prefrontal activity in older adults is linked to worse memory, not better, challenging the over-recruitment theory.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Aging Research
Background:
- Age-related memory decline is a significant concern.
- Neural mechanisms underlying memory encoding differences between age groups are not fully understood.
- Previous research suggests potential age-related differences in brain activation patterns during memory tasks.
Purpose of the Study:
- To investigate age-related differences in neural correlates of memory encoding.
- To examine if memory performance modulates these age-related neural differences.
- To test the hypothesis that right prefrontal cortex recruitment compensates for age-related memory decline.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to scan young and older adults during a memory encoding task.
- Participants made animacy decisions on visually presented words.
- Subsequent memory effects were analyzed by contrasting fMRI activity for subsequently remembered versus forgotten words.
Main Results:
- Both young and older adults showed similar subsequent memory effects in left prefrontal cortex and anterior hippocampus.
- Younger adults exhibited larger reversed subsequent memory effects in posterior cingulate cortex.
- Age-related bilateral distribution of prefrontal subsequent memory effects was observed, particularly in older adults with poorer memory performance.
Conclusions:
- Equivalent memory encoding-related activity in key brain regions suggests preserved function in older adults.
- Right prefrontal activation in older adults was associated with poorer memory, not compensation.
- The findings do not support the theory of right prefrontal 'over-recruitment' as a compensatory mechanism for age-related memory decline.
Related Concept Videos
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...
01:23Role of Neurotransmitters in Memory
Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is critical for...
Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is critical for...
01:26Higher Mental Functions of Brain: Learning and Memory
Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or playing an...
01:26Aging
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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,...
01:24Working Memory
Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.