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Accounting for change in declarative memory: A cognitive neuroscience perspective
Jenny Richmond1, Charles A Nelson
1Harvard Medical School And Developmental Medicine Center Laboratory of Cognitive Neuroscience, Children's Hospital Boston.
Developmental Review : DR
|September 5, 2008
Summary
Infant memory development shows early medial temporal lobe system maturation supporting basic declarative memory. Long-term retention and retrieval improvements are linked to ongoing dentate gyrus development.
Area of Science:
- Neuroscience
- Developmental Psychology
- Cognitive Science
Background:
- The medial temporal lobe memory system develops early, enabling basic declarative memory in infants.
- Significant advancements occur in memory processes throughout infancy, impacting declarative memory performance.
Purpose of the Study:
- To examine age-related changes in encoding, retention, and retrieval of declarative memory in infants.
- To correlate these memory process developments with underlying brain system maturation.
Main Methods:
- Review of current research on infant memory development.
- Analysis of age-related changes in encoding, retention, and retrieval processes.
- Consideration of neurodevelopmental factors, including myelination and dentate gyrus maturation.
Main Results:
- Infant encoding improvements may stem from rapid myelination in the first year.
- Enhanced long-term retention and flexible retrieval are associated with prolonged dentate gyrus development.
- The medial temporal lobe memory system supports rudimentary declarative memory early in infancy.
Conclusions:
- Brain development, particularly myelination and dentate gyrus maturation, significantly drives memory development during infancy.
- Further research integrating brain and behavioral measures is crucial for a comprehensive understanding.
- Understanding these developmental trajectories is key for early childhood cognitive development research.
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