Neural mechanisms of order information processing in working memory

  • Barbara Dolenc Laboratorij za kognitivno nevroznanost, Klinični oddelek za bolezni živčevja, Univerzitetni klinični center Ljubljana, Zaloška 2, 1000 Ljubljana
  • Jurij Bon Laboratorij za kognitivno nevroznanost, Klinični oddelek za bolezni živčevja, Univerzitetni klinični center Ljubljana, Zaloška 2, 1000 Ljubljana
  • Grega Repovš Oddelek za psihologijo, Filozofska fakulteta Univerze v Ljubljani, Aškerčeva 2, 1000 Ljubljana
Keywords: working memory, object recognition, order information processing, neuroimaging, electrophysiological studies


The ability to encode and maintain the exact order of short sequences of stimuli or events is often crucial to our ability for effective high-order planning. However, it is not yet clear which neural mechanisms underpin this process. Several studies suggest that in comparison with item recognition temporal order coding activates prefrontal and parietal brain regions. Results of various studies tend to favour the hypothesis that the order of the stimuli is represented and encoded on several stages, from primacy and recency estimates to the exact position of the item in a sequence. Different brain regions play a different role in this process. Dorsolateral prefrontal cortex has a more general role in attention, while the premotor cortex is more involved in the process of information grouping. Parietal lobe and hippocampus also play a significant role in order processing as they enable the representation of distance. Moreover, order maintenance is associated with the existence of neural oscillators that operate at different frequencies. Electrophysiological studies revealed that theta and alpha oscillations play an important role in the maintenance of temporal order information. Those EEG oscillations are differentially associated with processes that support the maintenance of order information and item recognition. Various studies suggest a link between prefrontal areas and memory for temporal order, implying that EEG neural oscillations in the prefrontal cortex may play a role in the maintenance of information on temporal order.


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How to Cite
Dolenc B, Bon J, Repovš G. Neural mechanisms of order information processing in working memory. ZdravVestn [Internet]. 1 [cited 17Jan.2019];82(10). Available from: