Semantic memory is our structured record of facts, meanings, concepts, and knowledge about the external world. Unlike episodic memory, it is . You know the information, but you likely have no memory of the exact moment you learned it. Semantic memory includes: Facts: "Paris is the capital of France."
| Brain region | Role in episodic-semantic interaction | |--------------|----------------------------------------| | | Binds episodic details (time, place) with semantic frameworks; pattern completion. | | Anterior temporal lobes (ATL) | Semantic hub – integrates modality-specific info into amodal concepts; damage leads to semantic dementia with preserved episodic details. | | Prefrontal cortex | Strategic retrieval – selecting relevant semantic knowledge to cue episodic recall. | | Posterior medial network (retrosplenial, parahippocampal, MTL) | Transforms episodic traces into semantic-like generalizations during offline states (sleep/rest). | episodic semantic memory
Decades later, Tulving revised his theory to incorporate brain evolution. This is the paper that introduced the SPI (Serial-Parallel-Independent) model, explaining how semantic memory might "evolve out of" episodic memory. Semantic memory is our structured record of facts,
| Feature | Episodic memory | Semantic memory | Episodic-semantic hybrid | |---------|----------------|----------------|---------------------------| | | Specific event, time/place | Facts, concepts, general knowledge | Gist of personal events, scripts, generalized episodes | | Consciousness | Autonoetic (self-knowing) | Noetic (knowing) | Both, or shifting | | Vulnerability | High (age, stress, amnesia) | Low (except dementia) | Intermediate | | Example | “I broke my leg skiing in 2010.” | “Skiing involves sliding on snow.” | “Skiing is dangerous – I learned that when I broke my leg.” | Semantic memory includes: Facts: "Paris is the capital