Neurobiology Childhood memory

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1 neurobiology

1.1 familiarity processes
1.2 recollective processes
1.3 recollection , familiarity dissociation





neurobiology

different memory retrieval tasks involve different cognitive mechanisms. according dual-coding theory, recognition of memory stimulus can studied via 2 cognitive mechanisms: recollection , familiarity. familiarity context-free, or independent of context in stimulus encoded, , concerns whether person knows have encountered stimulus previously. recollection context-dependent on details incidental encoding of target memory, , related cognitive feeling of remembering something. within medial temporal lobe, familiarity tends associated perirhinal region while recollection associated hippocampus. cortical regions related conscious recollections (feelings of time travel according tulving) include frontal lobes, while unconscious feelings of knowing may located elsewhere. dissociation of recollection vs. familiarity has been seen in 7-8 year-old children grow adolescence.


familiarity processes

lateral prefrontal cortex, superior parietal cortices


the contribution of lateral prefrontal cortex working memory has been recognized in adults. also, superior parietal cortex activated individual items have been encountered previously. has recently, however, been demonstrated lpfc active in children ages of 5 , 6. still not known whether lpfc active in preschool children during working memory tasks.


recollective processes

anterior medial prefrontal cortex, lateral parietal / temporal regions, hippocampus


according study riggins et al.(2009), observations lend support age-related increases in contextual memories. linked maturation of frontal lobe structures , connectivity between prefrontal cortex , medial temporal lobe. recollection memory details of individual objects related heightened activity in anterior medial prefrontal cortex , lateral parietal/temporal regions. recollection details include temporal order of events, , demonstrated improve age between ages 3 , 4.


recollection , familiarity dissociation

assessment of childhood memory development shows difference familiarity of individual objects versus recollection of details associated these objects. familiarity development tends more stable, while recollection continues develop adolescence. methods used assess these processes include behavioral, electrophysiological (erp), measures.








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