Three-dimensional probabilistic anatomical cranio-cerebral correlation via the international 10–20 system oriented for transcranial functional brain mapping

Okamoto, Masayuki; Dan, Haruka; Sakamoto, Kuniko; Takeo, Kazuhiro; Shimizu, Kōji; Kohno, Shigene; Oda, Ichiro; Isobe, Seiichiro; Suzuki, Tateo; Kohyama, Kaoru; Dan, Ippeita

doi:10.1016/j.neuroimage.2003.08.026

Cited by 1,123 publications

(801 citation statements)

References 29 publications

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“…Exact t-values of the significant channels can be examined in Table 1. applied. This method uses structural information from an anatomical database (Okamoto et al, 2004;Jurcak et al, 2005) to provide estimates of the channel positions in a standardized stereotaxic 3D brain atlas (Montreal Neurological Institute coordinate system, MNI, Collins et al, 1994;cf. Tsuzuki et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Like EEG any anatomical inference on the cortical areas relies on external bony landmarks and can thus be referenced to the 10-20 system and its extensions. Recently, a series of publications has addressed this issue and supplied a tool to frame the very rough anatomical differentiation into a probabilistic mapping (Jurcak et al, 2005Okamoto et al, 2004). In brief, cortical anatomy was related to landmarks identified by 10-20-system positions in 1000 simulated brains.…”

Section: Optical Topography As a Tool To Investigate Visual Word Recomentioning

confidence: 99%

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Differential activation of frontal and parietal regions during visual word recognition: An optical topography study

et al. 2008

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The present study examined cortical oxygenation changes during lexical decision on words and pseudowords using functional NearInfrared Spectroscopy (fNIRS). Focal hyperoxygenation as an indicator of functional activation was compared over three target areas over the left hemisphere. A 52-channel Hitachi ETG-4000 was used covering the superior frontal gyrus (SFG), the left inferior parietal gyrus (IPG) and the left inferior frontal gyrus (IFG). To allow for anatomical inference a recently developed probabilistic mapping method was used to determine the most likely anatomic locations of the changes in cortical activation [Tsuzuki, D., Jurcak, V., Singh, A.K., Okamoto, M., Watanabe, E., Dan, I., 2007. Virtual spatial registration of stand-alone fNIRS data to MNI space. NeuroImage 43 (4), 1506-1518.Subjects made lexical decisions on 50 low and 50 high frequency words and 100 pseudowords. With respect to the lexicality effect, words elicited a larger focal hyperoxygenation in comparison to pseudowords in two regions identified as the SFG and left IPG. The SFG activation difference was interpreted to reflect decision-related mechanisms according to the Multiple Read-Out Model [Grainger, J., Jacobs, A.M., 1996. Orthographic processing in visual word recognition: A multiple read-out model. Psychological Review 103, 518-565]. The greater oxygenation response to words in the left IPG suggests that this region connects orthographic, phonological and semantic representations. A decrease of deoxygenated hemoglobin was observed to low frequency in comparison to high frequency words in a region identified as IFG. This region's sensitivity to word frequency suggests its involvement in grapheme-phoneme conversion, or its role during the selection of preactivated semantic candidates.

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Section: Discussionmentioning

confidence: 99%

Section: Optical Topography As a Tool To Investigate Visual Word Recomentioning

confidence: 99%

Differential activation of frontal and parietal regions during visual word recognition: An optical topography study

et al. 2008

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“…In order to assess functional connectivity between all major areas, the cortex areas under the 19 head surface electrode locations Fp1/2, F7/8, F3/4, Fz, C3/4, Cz, T3/T4, T5/6, P3/4, Pz, O1/2 of the international 10/20 system (Jasper, 1958) were used. The brain regions under these electrodes are tabulated in (Okamoto et al, 2004). A ROI was defined for the cortical voxels under each electrode, in such a way that all cortical voxels were assigned to the "origin" electrode to which they were closest.…”

Section: Data Conditioningmentioning

confidence: 99%

Reduced functional connectivity between cortical sources in five meditation traditions detected with lagged coherence using EEG tomography

Lehmann¹,

Faber²,

Tei

et al. 2012

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Brain functional states are established by functional connectivities between brain regions. In experienced meditators (13 Tibetan Buddhists, 15 QiGong, 14 Sahaja Yoga, 14 Ananda Marga Yoga, 15 Zen), 19-channel EEG was recorded before, during and after that meditation exercise which their respective tradition regards as route to the most desirable meditative state. The head surface EEG data were recomputed (sLORETA) into 19 cortical regional source model time series. All 171 functional connectivities between regions were computed as 'lagged coherence' for the eight EEG frequency bands (delta through gamma). This analysis removes ambiguities of localization, volume conduction-induced inflation of coherence, and reference-dependence. All significant differences (corrected for multiple testing) between meditation compared to no-task rest before and after meditation showed lower coherence during meditation, in all five traditions and eight (inhibitory as well as excitatory) frequency bands. Conventional coherence between the original head surface EEG time series very predominantly also showed reduced coherence during meditation. The topography of the functional connectivities was examined via PCAbased computation of principal connectivities. When going into and out of meditation, significantly different connectivities revealed clearly different topographies in the delta frequency band and minor differences in the beta-2 band. The globally reduced functional interdependence between brain regions in meditation suggests that interaction between the self process functions is minimized, and that constraints on the self process by other processes are minimized, thereby leading to the subjective experience of noninvolvement, detachment and letting go, as well as of all-oneness and dissolution of ego borders during meditation. AbstractBrain functional states are established by functional connectivities between brain regions. In experienced meditators (13 Tibetan Buddhists, 15 QiGong, 14 Sahaja Yoga, 14 Ananda Marga Yoga, 15 Zen), 19-channel EEG was recorded before, during and after that meditation exercise which their respective tradition regards as route to the most desirable meditative state. The head surface EEG data were recomputed (sLORETA) into 19 cortical regional source model time series. All 171 functional connectivities between regionswere computed as 'lagged coherence' for the eight EEG frequency bands (delta through gamma). This analysis removes ambiguities of localization, volume conduction-induced inflation of coherence, and reference-dependence. All significant differences (corrected for multiple testing) between meditation compared to no-task rest before and after meditation showed lower coherence during meditation, in all five traditions and eight (inhibitory as well as excitatory) frequency bands. Conventional coherence between the original head surface EEG time series very predominantly also showed reduced coherence during meditation. The topography of the functional connectivities was examined ...

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“…The likely cortical projection points of the cranial markers P3 and P4 (UI 10-20 system) are the right and left SPL (Okamoto, et al, 2004), as predicted by the Talairach Daemon program (Lancaster, et al, 2000). In this study, the probabilistic cortical projection points (expressed in MNI coordinates) of P3 and P4 are based on the Okamoto et al work (Okamoto, et al, 2004). P3…”

Section: Experimental Set-up and Study Designmentioning

confidence: 99%

“…The MNI coordinates of P4 and P3 (international 10-20 cortical projection points (Okamoto, et al, 2004)) were selected as the reference points on the scalp. During both the experiments the center optodes (emitter 13 on the left and emitter 18 on the right) were aligned with P3 and P4…”

Section: Regarding Brain Data Hypothesis Testing Was Utilised As Impmentioning

confidence: 99%

The role of the posterior parietal cortex in stereopsis and hand-eye coordination during motor task behaviours

et al. 2014

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Three-dimensional probabilistic anatomical cranio-cerebral correlation via the international 10–20 system oriented for transcranial functional brain mapping

Cited by 1,123 publications

References 29 publications

Differential activation of frontal and parietal regions during visual word recognition: An optical topography study

Differential activation of frontal and parietal regions during visual word recognition: An optical topography study

Reduced functional connectivity between cortical sources in five meditation traditions detected with lagged coherence using EEG tomography

The role of the posterior parietal cortex in stereopsis and hand-eye coordination during motor task behaviours

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