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In search of memory traces
1Neuroscience Program, University of Southern California, Los Angeles, CA 90089-2520, USA. thompson@neuro.usc.edu
Annual Review of Psychology
|February 16, 2005
Summary
Investigating memory traces requires identifying storage locations. This study localized basic memory traces to the cerebellum and higher-order traces to the hippocampus using classical conditioning.
Area of Science:
- Neuroscience
- Cognitive Science
- Neurobiology
Background:
- Understanding memory formation, storage, and retrieval is crucial for analyzing brain substrates of memory.
- Localization of memory storage is a fundamental challenge in memory research.
Purpose of the Study:
- To review various approaches for analyzing memory trace localization.
- To propose a strategy combining multiple techniques to identify essential memory trace circuits.
- To localize memory traces within identified circuits using reversible inactivation methods.
Main Methods:
- Electrophysiological recording
- Lesions
- Electrical stimulation
- Pathway tracing
- Reversible inactivation
- Classical conditioning of eye blink responses
Main Results:
- Identified the essential memory trace circuit for classical conditioning.
- Localized the basic memory trace to the cerebellum.
- Characterized putative higher-order memory traces in the hippocampus.
Conclusions:
- The cerebellum is essential for basic memory traces in classical conditioning.
- The hippocampus plays a role in higher-order memory traces.
- A multi-technique approach is effective for localizing memory traces and circuits.