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To further this understanding, we employed a novel numerical working memory paradigm in 28 young, healthy adults who underwent magnetoencephalography (MEG). The resulting data were examined in the time\u2010frequency domain prior to image reconstruction using a beamformer. Whole\u2010brain, spectrally\u2010constrained coherence was also employed to determine network connectivity. In response to the numerical task, participants exhibited robust alpha\/beta oscillations in the bilateral parietal cortices. Whole\u2010brain statistical comparisons examining the effect of numerical manipulation during memory\u2010item maintenance revealed a difference centered in the right superior parietal cortex, such that oscillatory responses during numerical manipulation were significantly stronger than when no manipulation was necessary. Additionally, there was significantly reduced cortico\u2010cortical coherence between the right and left superior parietal regions during the manipulation compared to the maintenance trials, indicating that these regions were functioning more independently when the numerical information had to be actively processed. In sum, these results support previous studies that have implicated the importance of parietal regions in numerical processing, but also provide new knowledge on the spectral, temporal, and network dynamics that serve this critical cognitive function during active working memory maintenance.<\/jats:p>","DOI":"10.1002\/hbm.25043","type":"journal-article","created":{"date-parts":[[2020,5,27]],"date-time":"2020-05-27T14:24:40Z","timestamp":1590589480000},"page":"3709-3719","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Numerical working memory alters alpha\u2010beta oscillations and connectivity in the parietal cortices"],"prefix":"10.1002","volume":"41","author":[{"given":"Sam M.","family":"Koshy","sequence":"first","affiliation":[{"name":"Center for Magnetoencephalography University of Nebraska Medical Center (UNMC)  Omaha Nebraska USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0917-1570","authenticated-orcid":false,"given":"Alex I.","family":"Wiesman","sequence":"additional","affiliation":[{"name":"Center for Magnetoencephalography University of Nebraska Medical Center (UNMC)  Omaha Nebraska USA"},{"name":"Department of Neurological Sciences UNMC  Omaha Nebraska USA"},{"name":"Cognitive Neuroscience of Development &amp; 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