Development of a Brain Index for Dementia Diagnosis Using Quantitative EEG Analysis

Han, Dong‐Wook

doi:10.1589/jpts.25.497

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…At rest, the patient group showed μ- and α-waves in the sensorimotor cortical areas, prefrontal areas, and in an extended area over the occipital lobe. These results were consistent with the conventionally known origins of μ-waves, namely, the sensorimotor cortical areas 13 ) , frontal lobe 25 ) , and occipital lobe 26 ) . The presence of μ-waves at rest reflected the inhibition of neuronal excitation in sensorimotor areas, and may also reflect the resting state similar to α-waves 25 ) .…”

Section: Discussionsupporting

confidence: 90%

“…The significance threshold was based on a permutation test with 5000 permutations, using log-transformed LORETA values, with subject-wise normalization (on the assumption that differences in the base-line activity between healthy subjects and patients may exist). When μ-waves manifest in the sensorimotor cortex 13 ) , frontal lobe 25 ) , or occipital lobe 26 ) , the waveform components and the names of the waves can differ (such as α-waves) depending on their region of occurrence. Interestingly, this phenomenon is evident even when these waves have the same frequency range.…”

Section: Methodsmentioning

confidence: 99%

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Effects of vibratory stimulation-induced kinesthetic illusions on the neural activities of patients with stroke

et al. 2016

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[Purpose] This study evaluated the influence of vibratory stimulation-induced kinesthetic illusion on brain function after stroke. [Subjects] Twelve healthy individuals and 13 stroke patients without motor or sensory loss participated. [Methods] Electroencephalograms were taken at rest and during vibratory stimulation. As a neurophysiological index of brain function, we measured the μ-rhythm, which is present mainly in the kinesthetic cortex and is attenuated by movement or motor imagery and compared the data using source localization analyses in the Standardized Low Resolution Brain Electromagnetic Tomography (sLORETA) program. [Results] At rest, μ-rhythms appeared in the sensorimotor and supplementary motor cortices in both healthy controls and stroke patients. Under vibratory stimulation, no μ-rhythm appeared in the sensorimotor cortex of either group. Moreover, in the supplementary motor area, which stores the motor imagery required for kinesthetic illusions, the μ-rhythms of patients were significantly stronger than those of the controls, although the μ-rhythms of both groups were reduced. Thus, differences in neural activity in the supplementary motor area were apparent between the subject groups. [Conclusion] Kinesthetic illusions do occur in patients with motor deficits due to stroke. The neural basis of the supplementary motor area in stroke patients may be functionally different from that found in healthy controls.

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Section: Discussionsupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Effects of vibratory stimulation-induced kinesthetic illusions on the neural activities of patients with stroke

et al. 2016

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“…Stable EEGs were measured before staring the tasks, and task performance. The sites of the electrodes attached to the subjects scalps followed the international 10/20 electrode system, four areas of Fp1 (left prefrontal), Fp2 (right prefrontal), F3 (left frontal lobe), F4 (right frontal lobe), and O1 (left occipital lobe), and O2 (right occipital lobe), using the monoclonal derivation method 16 , 17 , 18 ) .…”

Section: Methodsmentioning

confidence: 99%

Color temperature’s impact on task performance and brainwaves of school-age children

Park

2015

J Phys Ther Sci

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[Purpose] This study investigated color temperature’s impact on task performance. It presents a scientific analysis of brainwave and task performance time changes, and the results of a self-report type survey. [Subjects] Twenty-four elementary school fifth-grade boys and girls with no visual problems participated in the experiment. [Methods] Physiological reaction times of task performance were measured in a laboratory that could fix and maintain color temperature. Brainwave changes and the task performance times were measured, and a self-report questionnaire was conducted in order to measure of emotional reactions. [Results] Regarding the brainwave changes associated with color temperature, alpha waves were emitted in the O2 area when puzzle tasks were illuminated by orange light and low and high beta waves were emitted in the F3 area under white light. Five items (Brilliant, Soft, Lively, Relaxed, Open) were reported predominantly in responses to orange light in the self-report questionnaire. [Conclusion] The results of this study show that relaxation and stability are not assured when the color temperature is low, and that concentration and cognitive activity are not necessarily easier when the color temperature is high. The color temperature change when performing tasks promoted emotional factors more than brainwave, a biological change.

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“…EEG investigates a brain electrical activity in different areas of the scalp, describing it in wave form or band, and in turn, varies in frequency and amplitude ( Lee et al, 2015 ). Frequently used for the diseases diagnosis and for the medical follow-up of people with dementia ( Han, 2013 ), epilepsy, and other clinical conditions ( Cunha et al, 2009 ). Regarding physiotherapy, it has been used to evaluate individuals’ cortical activity of during an application or simulation of motor and cognitive tasks ( Machado et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Investigation of alpha band of the electroencephalogram before and after a task of proprioceptive neuromuscular facilitation

et al. 2017

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The proprioceptive neuromuscular facilitation (PNF) sets up a feature of treatment developed with the objective to facilitate and improve the motor performance. The aim of this study was to investigate in healthy female individuals the effects of electrophysiological of a diagonal of the PNF upper limb. The sample consisted of 30 female participants aged between 18 to 28 years, randomly divided into 3 groups (G1, G2, and G3). The three groups had 2 moments of electroencephalographic signal detection, before and after the task. The statistical neurophysiological design allowed the analysis of the relative power of alpha band in three leads (Fz, F7, and F8). Thus, a three-way mixed factorial analysis of variance (ANOVA) was performed to investigate the factor inter subjects (groups) and intrasubjects (areas and moments), a two-way ANOVA to investigate the interactions between the three factors, and a one-way ANOVA to analyze separately the factors time and area. A P≤0.05 was considered as significance level. The results showed significant increase of alpha band in the three groups analyzed, being more evident to the G2 group. Therefore, the PNF can be considered favorable also in relation to the cortical behavior, reinforcing its use in rehabilitation processes, especially in the clinical practice of physiotherapy.

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Development of a Brain Index for Dementia Diagnosis Using Quantitative EEG Analysis

Cited by 4 publications

References 6 publications

Effects of vibratory stimulation-induced kinesthetic illusions on the neural activities of patients with stroke

Effects of vibratory stimulation-induced kinesthetic illusions on the neural activities of patients with stroke

Color temperature’s impact on task performance and brainwaves of school-age children

Investigation of alpha band of the electroencephalogram before and after a task of proprioceptive neuromuscular facilitation

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