Correlations in background activity control persistent state stability and allow execution of working memory tasks
نویسندگان
چکیده
منابع مشابه
Correlations in background activity control persistent state stability and allow execution of working memory tasks
Working memory (WM) requires selective information gating, active information maintenance, and rapid active updating. Hence performing a WM task needs rapid and controlled transitions between neural persistent activity and the resting state. We propose that changes in correlations in neural activity provides a mechanism for the required WM operations. As a proof of principle, we implement susta...
متن کاملIN COMPUTATIONAL NEUROSCIENCE Correlations in background activity control persistent state stability and allow execution of working memory tasks
Working memory (WM) requires selective information gating, active information maintenance, and rapid active updating. Hence performing a WM task needs rapid and controlled transitions between neural persistent activity and the resting state. We propose that changes in correlations in neural activity provides a mechanism for the required working memory operations. As a proof of principle, we imp...
متن کاملRegional brain activity during working memory tasks.
The first aim of our PET study was to replicate previous findings concerning the brain areas activated by a verbal working memory task. The second aim was to specify the neural basis of the central executive, using a task of working memory updating. Our data confirm that the lower left supramarginal gyrus and premotor area are the key regions subserving short-term verbal memory processes. They ...
متن کاملShort-term plasticity explains irregular persistent activity in working memory tasks.
Persistent activity in cortex is the neural correlate of working memory (WM). In persistent activity, spike trains are highly irregular, even more than in baseline. This seemingly innocuous feature challenges our current understanding of the synaptic mechanisms underlying WM. Here we argue that in WM the prefrontal cortex (PFC) operates in a regime of balanced excitation and inhibition and that...
متن کاملSimple and Complex Working Memory Tasks Allow Similar Benefits of Information Compression
Because complex span tasks were designed to create a demanding concurrent task, the average span is usually lower (4 ± 1 items) than in simple span tasks (7 ± 2 items). One possible reason for the higher span of simple span tasks is that participants can take profit of the spare time to chunk a few stimuli into 4± 1 groups. It follows that the respective spans of these two types of tasks could ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Frontiers in Computational Neuroscience
سال: 2013
ISSN: 1662-5188
DOI: 10.3389/fncom.2013.00139