MemoryFormation

Memory Formation Research

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Memory Prediction research covers using HTM/Memory Prediction theory for memorizing and recognizing complex patterns, produce internal representation.

Terms

• *short-term memory* - lasts for max 18 seconds
• *long-term memory* - lasts for day or years (undergo forgetting process) - declarative and procedural
• *declarative memory* - all memories that are consciously available - episodic and semantic
• *episodic memory* - memory for specific events in time
• *semantic memory* - knowledge about the external world
• *procedural memory* - how to perform certain motor behaviour

Long-term memory (LTM)

as per [[1]]:

• *declarative memory* - encoded by hippocampus (also by enthorinal and perirhinal) but consolidated somewhere else - probably in temporal cortex
• *procedural memory* - encoded and probably stored in cerebellum / striatum
• *emotional memory* - related to amygdala

Sensory Neocortex

• recognize and predict functions, as per Jeff Hawkins
• long-term memory formation by hippocampus - how it is related to neocortex?
• do we have short-term memory in neocortex?

• Current Understanding*:
• information is supplied by discrete events (not as ongoing flow) - e.g. saccades, which supply fragmentary information to visual neocortex 3 times per second
• neocortex holds generalization structures, averaged perceived information, not episodic memory
• association cortex and frontal cortex (holds feelings) supply feedback via cingulate gyrus to sensory cortex and hippocampus

* associations and emotionally stressed data are stored easier

• temporal cortex (TC) lies between visual sensory cortex (VC) and hippocampus (HC)

* LTM is not stored by hippocampus, but hippocampus is absolutely required to create LTM as per HM patient
* hippocampus is not required to keep short-term memory (18 seconds)
* most appropriate place for LTM is temporal cortex
* VC perceives primary sensory information and transforms to stable internal representation
* VC -> TC flow supplies flow of internal representations, or signal of inability to recognize/predict; TC -> VC is unclear
* HC -> TC flow represents control of memorising by hippocampus