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