Differential topographic pattern of EEG coherence between simultaneous and successive coding tasks

Okuhata, Shiho; Okazaki, Shinji; Maekawa, Hisao

doi:10.1016/j.ijpsycho.2007.06.002

Cited by 7 publications

(13 citation statements)

References 59 publications

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“…Recent neuroimaging studies have shown that children rely more on frontal brain areas at the beginning of learning mathematics and shift into parietal brain areas as they acquire more experience (see Ben-Shalom, Berger, & Henik, 2012, for a review). If successive processing activates parietal/temporal areas of the brain (Okuhata, Okazaki, & Maekawa, 2007), then it should contribute to mathematics in later grades. On the other hand, if frontal brain areas are activated during the initial phases of learning mathematics and planning is a frontal lobe operation, then planning should be most strongly related to mathematics at this age level (which we found in this study; see Table 12.2 and model B in Table 12.4).…”

Section: Discussionmentioning

confidence: 99%

Is Intelligence Relevant in Reading “μάνα” and in Calculating “3 + 5”?

Georgiou¹,

Manolitsis²,

Tziraki³

2015

Cognition, Intelligence, and Achievement

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Section: Discussionmentioning

confidence: 99%

Is Intelligence Relevant in Reading “μάνα” and in Calculating “3 + 5”?

Georgiou¹,

Manolitsis²,

Tziraki³

2015

Cognition, Intelligence, and Achievement

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“…The fact that despite the ''noisy reference'', clear group differences can still be found, suggests the analysis is robust. Coherence is an established widely used method and connected ear-lobe reference is often used in EEG studies using the number of electrodes (or less) we used (for example Hidasi et al 2007;Okuhama et al 2007). For the computation of coherence, there is no perfect montage.…”

Section: Discussionmentioning

confidence: 99%

Working Memory in Schizophrenia: An EEG Study Using Power Spectrum and Coherence Analysis to Estimate Cortical Activation and Network Behavior

Pachou

Vourkas²,

Simos

et al. 2008

Brain Topogr

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This study examined regional cortical activations and cortico-cortical connectivity in a group of 20 high-functioning patients with schizophrenia and 20 healthy controls matched for age and sex during a 0- and a 2-back working memory (WM) task. An earlier study comparing schizophrenia patients with education level-matched healthy controls revealed less "optimally" organized network during the 2-back task, whereas a second study with healthy volunteers had suggested that the degree of cortical organization may be inversely proportional to educational level (less optimal functional connectivity in better educated individuals interpreted as the result of higher efficiency). In the present study, both groups succeeded in the 2-back WM task although healthy individuals had generally attained a higher level of education. First absolute power spectrum of the different frequency bands corresponding to the electrodes of each lobe was calculated. Then the mean values of coherence were calculated as an index of the average synchronization to construct graphs in order to characterize local and large scale topological patterns of cortico-cortical connectivity. The power spectra analyses showed signs of hypofrontality in schizophrenics with an asymmetry. Additionally, differences between the groups with greater changes during WM in healthy individuals were visible in all lobes more on the left side. The graph parameter results indicated decreased small-world architecture i.e. less optimal cortico-cortical functional organization in patients as compared to controls. These findings are consistent with the notion of aberrant neural organization in schizophrenics which is nevertheless sufficient in supporting adequate task performance.

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“…On the basis of the agreement of Thatcher et al (2005) and Luria's model (1973), psychophysiological investigation such as with EEG on two distinctive processing types, simultaneous and successive processing, in posterior sensory integration system is necessary. Okuhata et al (2007) investigated EEG coherence change patterns during a simultaneous and a successive processing task of the DN-CAS (Naglieri and Das, 1997). Two conditions (active information processing and passive perception) of each task were compared.…”

Section: Introductionmentioning

confidence: 99%