VL 19 Memory for specifics and general

Generalization: detection of regularities across repeated exposures to similar experiences —> deleting everything that is different

Specificity: formation and retrieval of particular experiences in detail —> SAVING everything that is different

• theoretical framework of memory

• basis: computational modeling

• generalization = pattern completino by neocortex

  —> slow extraction

• specificity = pattern separation by hippocampus

  —> fast encoding

CLS cannot explain developmental data

• earlier development —> statistical learning

• earlier relative stability —> familiarity

• BUT: Neocortex matures slowly during childhood & adolescence —> CLS cannot explain this data

  
  

• tries to solve gap between CLS & developmental data

• generalization supported by recurrent processing in hippocampal network <-> in exchange with entorhinal cortex

Generalization —> monosynaptic pathway for completion

specificity —> trisynaptic pathway for completion and Separation

• completion

• CA 1

• EC 3 und 5

• separation + completion

• ca 3 -> CA1

• dentate gyrus —> EC 2

• increase in all subfields until early adolescence

• increase in DG and CA3 up until young adulthood

  • DG takes longer to develop

  • relevant for specificity so makes sense that infants do not remember specific memories at young ages

• generalization followed by specificity due to the pattern of defferentiation maturation in hippocampal subfields

  1. accumulation of knowledge from repeated experiences (-> that means they are important!) —> advantageous

  2. knowledge as framework in which details of new experiences can be added on and last long —> rise to episodic memory