Electrophysiological Decoding of Spatial and Color Processing in Human Prefrontal Cortex

Min, Byoung-Kyong; Kim, H S; Ko, Wonjun; Ahn, Min Hee; Suk, Heung-Il; Pantazis, Dimitrios; Knight, Robert T.

doi:10.1016/j.neuroimage.2021.118165

Cited by 5 publications

(3 citation statements)

References 71 publications

(90 reference statements)

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“…One possible explanation could be the differential processing of colors in distinct brain regions or pathways, which could account for this timing disparity. Additionally, the literature supports the notion that the choice of color may influence EEG decoding accuracy in color-perception tasks, as seen in a study using red and green-colored stimuli where it is reported that the beta-band provided the highest EEG decoding accuracy of color-perception tasks vs. mental-rotation tasks 77 while using red and green-colored stimuli. Moreover, the observation of faster beta frequency responses to red and blue colors compared to green may be indicative of differences in alertness.…”

Section: Discussionsupporting

confidence: 53%

Brain activity characteristics of RGB stimulus: an EEG study

Khadir,

Maghareh,

Sasani Ghamsari

et al. 2023

Sci Rep

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The perception of color is a fundamental cognitive feature of our psychological experience, with an essential role in many aspects of human behavior. Several studies used magnetoencephalography, functional magnetic resonance imaging, and electroencephalography (EEG) approaches to investigate color perception. Their methods includes the event-related potential and spectral power activity of different color spaces, such as Derrington-Krauskopf-Lennie and red-green-blue (RGB), in addition to exploring the psychological and emotional effects of colors. However, we found insufficient studies in RGB space that considered combining all aspects of EEG signals. Thus, in the present study, focusing on RGB stimuli and using a data-driven approach, we investigated significant differences in the perception of colors. Our findings show that beta oscillation of green compared to red and blue colors occurs in early sensory periods with a latency shifting in the occipital region. Furthermore, in the occipital region, the theta power of the blue color decreases noticeably compared to the other colors. Concurrently, in the prefrontal area, we observed an increase in phase consistency in response to the green color, while the blue color showed a decrease. Therefore, our results can be used to interpret the brain activity mechanism of color perception in RGB color space and to choose suitable colors for more efficient performance in cognitive activities.

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Section: Discussionsupporting

confidence: 53%

Brain activity characteristics of RGB stimulus: an EEG study

Khadir,

Maghareh,

Sasani Ghamsari

et al. 2023

Sci Rep

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“…Goldman-Rakic and others applied this methodology to the study of WM by manipulating the spatial locations of task stimuli; their results confirmed and extended earlier findings supporting PFC as a critical node for WM because they found that some PFC neurons’ activity was not just elevated during the delay, but elevated in a manner specific to the spatial location of the remembered stimulus ( Funahashi et al, 1989 ). Follow-up studies extended findings that PFC activity not only represents spatial stimulus features, but also other non-spatial stimulus features like motion direction ( Zaksas and Pasternak, 2006 ), object ( Wilson et al, 1993 ), prospective code ( Rainer et al, 1999 ), abstract rules ( Wallis et al, 2001 ), categories ( Freedman et al, 2001 ), color ( Min et al, 2021 ), etc. Additionally, this spatially-selective delay activity was later found to extend beyond neurons in the PFC and into other high-order regions related to attentional control, including the posterior parietal cortex ( Chafee and Goldman-Rakic, 1998 ), leading to a view of WM as centered in the PFC, with related representations in high-order regions of the parietal cortex with which the PFC is strongly interconnected.…”

Section: Neuroanatomy Of Wmmentioning

confidence: 66%

Alterations of neural activity in the prefrontal cortex associated with deficits in working memory performance

Li,

Rosen,

Chang

et al. 2023

Front. Behav. Neurosci.

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Working memory (WM), a core cognitive function, enables the temporary holding and manipulation of information in mind to support ongoing behavior. Neurophysiological recordings conducted in nonhuman primates have revealed neural correlates of this process in a network of higher-order cortical regions, particularly the prefrontal cortex (PFC). Here, we review the circuit mechanisms and functional importance of WM-related activity in these areas. Recent neurophysiological data indicates that the absence of these neural correlates at different stages of WM is accompanied by distinct behavioral deficits, which are characteristic of various disease states/normal aging and which we review here. Finally, we discuss emerging evidence of electrical stimulation ameliorating these WM deficits in both humans and non-human primates. These results are important for a basic understanding of the neural mechanisms supporting WM, as well as for translational efforts to developing therapies capable of enhancing healthy WM ability or restoring WM from dysfunction.

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“…Recent neuroimaging techniques have been able to objectively measure the contribution of PFC involvement in human activity (Parris et al, 2019 ; Udina et al, 2019 ; Min et al, 2021 ). Traditional brain imaging techniques such as functional magnetic resonance imaging (fMRI) has a high spatial resolution to detect cerebral blood flow signals.…”

Section: Introductionmentioning

confidence: 99%

Brain activation of the PFC during dual-task walking in stroke patients: A systematic review and meta-analysis of functional near-infrared spectroscopy studies

Wang

Dai²,

Xu³

et al. 2023

Front. Neurosci.

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BackgroundDual-task walking is a good paradigm to measure the walking ability of stroke patients in daily life. It allows for a better observation of brain activation under dual-task walking to assess the impact of the different tasks on the patient when combining with functional near-infrared spectroscopy (fNIRS). This review aims to summarize the cortical change of the prefrontal cortex (PFC) detected in single-task and dual-task walking in stroke patients.MethodsSix databases (Medline, Embase, PubMed, Web of Science, CINAHL, and Cochrane Library) were systematically searched for relevant studies, from inception to August 2022. Studies that measured the brain activation of single-task and dual-task walking in stroke patients were included. The main outcome of the study was PFC activity measured using fNIRS. In addition, a subgroup analysis was also performed for study characteristics based on HbO to analyze the different effects of disease duration and the type of dual task.ResultsTen articles were included in the final review, and nine articles were included in the quantitative meta-analysis. The primary analysis showed more significant PFC activation in stroke patients performing dual-task walking than single-task walking (SMD = 0.340, P = 0.02, I2 = 7.853%, 95% CI = 0.054–0.626). The secondary analysis showed a significant difference in PFC activation when performing dual-task walking and single-task walking in chronic patients (SMD = 0.369, P = 0.038, I2 = 13.692%, 95% CI = 0.020–0.717), but not in subacute patients (SMD = 0.203, P = 0.419, I2 = 0%, 95% CI = −0.289–0.696). In addition, performing walking combining serial subtraction (SMD = 0.516, P < 0.001, I2 = 0%, 95% CI = 0.239–0.794), obstacle crossing (SMD = 0.564, P = 0.002, I2 = 0%, 95% CI = 0.205–0.903), or a verbal task (SMD = 0.654, P = 0.009, I2 = 0%, 95% CI = 0.164–1.137) had more PFC activation than single-task walking, while performing the n-back task did not show significant differentiation (SMD = 0.203, P = 0.419, I2 = 0%, 95% CI = −0.289–0.696).ConclusionsDifferent dual-task paradigms produce different levels of dual-task interference in stroke patients with different disease durations, and it is important to choose the matching dual-task type in relation to the walking ability and cognitive ability of the patient, in order to better improve the assessment and training effects.Systematic review registrationhttps://www.crd.york.ac.uk/prospero/, identifier: CRD42022356699.

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Electrophysiological Decoding of Spatial and Color Processing in Human Prefrontal Cortex

Cited by 5 publications

References 71 publications

Brain activity characteristics of RGB stimulus: an EEG study

Brain activity characteristics of RGB stimulus: an EEG study

Alterations of neural activity in the prefrontal cortex associated with deficits in working memory performance

Brain activation of the PFC during dual-task walking in stroke patients: A systematic review and meta-analysis of functional near-infrared spectroscopy studies

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