ECE ENG 1007

Multisystem Model of Memory

A framework proposing that memory is not a single unified entity, but consists of multiple independent systems supported by distinct neural circuits.

Declarative memory

Explicit, conscious memory for facts and events that relies on the hippocampus and frontal lobes, and typically declines with age.

Working memory

A declarative memory subsystem responsible for temporarily holding and manipulating information, lasting approximately 2 to 18 seconds.

Episodic memory

A type of explicit memory that stores specific personal experiences, events, and autobiographical context.

Semantic memory

A form of explicit memory that holds general facts, concepts, and vocabulary without personal contextual details.

Nondeclarative memory

Implicit memory that operates without conscious awareness, utilizes the cerebellum and basal ganglia, and remains relatively stable during aging.

Priming

A nondeclarative memory effect where prior exposure to a stimulus unconsciously speeds up or enhances subsequent processing.

Procedural memory

A type of implicit memory that stores learned motor skills and habits, such as riding a bicycle or typing.

Classical conditioning

An implicit memory mechanism involving learned associations between environmental stimuli, famously illustrated by Pavlov's dog experiments.

Evidence for distinct memory systems from amnesia

Case studies such as H.M. and Clive Wearing, who lost the ability to form new declarative memories while preserving working memory and nondeclarative learning.