Electroencephalographic coherence abnormalities in preterm diplegia

Koeda, Tatsuya; Takeshita, Kenzo

doi:10.1016/s0887-8994(97)00155-0

Cited by 12 publications

(12 citation statements)

References 37 publications

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“…In addition, Craje and colleagues [46] observed that participants with right hemiparesis had more difficulties in switching between different grip types than participants with left hemiparesis. Our findings are also in agreement with previous data showing that bilaterally impaired CP children with spastic diplegia displayed higher intrahemispheric coherence for delta, beta and theta EEG bands in the left than in the right hemisphere [47]. In our opinion, all these results support the view that brain damage to right or to left hemisphere may have led to different plasticity mechanisms in cerebral palsy.…”

Section: Discussionsupporting

confidence: 93%

Differences in somatosensory processing due to dominant hemispheric motor impairment in cerebral palsy

et al. 2014

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BackgroundAlthough cerebral palsy (CP) is usually defined as a group of permanent motor disorders due to non-progressive disturbances in the developing fetal or infant brain, recent research has shown that CP individuals are also characterized by altered somatosensory perception, increased pain and abnormal activation of cortical somatosensory areas. The present study was aimed to examine hemispheric differences on somatosensory brain processing in individuals with bilateral CP and lateralized motor impairments compared with healthy controls. Nine CP individuals with left-dominant motor impairments (LMI) (age range 5–28 yrs), nine CP individuals with right-dominant motor impairments (RMI) (age range 7–29 yrs), and 12 healthy controls (age range 5–30 yrs) participated in the study. Proprioception, touch and pain thresholds, as well as somatosensory evoked potentials (SEP) elicited by tactile stimulation of right and left lips and thumbs were compared.ResultsPain sensitivity was higher, and lip stimulation elicited greater beta power and more symmetrical SEP amplitudes in individuals with CP than in healthy controls. In addition, although there was no significant differences between individuals with RMI and LMI on pain or touch sensitivity, lip and thumb stimulation elicited smaller beta power and more symmetrical SEP amplitudes in individuals with LMI than with RMI.ConclusionsOur data revealed that brain processing of somatosensory stimulation was abnormal in CP individuals. Moreover, this processing was different depending if they presented right- or left-dominant motor impairments, suggesting that different mechanisms of sensorimotor reorganization should be involved in CP depending on dominant side of motor impairment.

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Section: Discussionsupporting

confidence: 93%

Differences in somatosensory processing due to dominant hemispheric motor impairment in cerebral palsy

et al. 2014

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“…In this study, significant group differences were not observed for the amplitudes of neuronal oscillations (i.e., delta, theta, alpha, beta, and gamma bands). Although significant group effects on the amplitudes or power of EEG oscillations have been observed in other studies, inconsistent results have been reported 6 , 9 , which may be caused by the age and clinical heterogeneity of patients with CP. On the other hand, topographical randomization test revealed the map configuration of beta oscillation amplitude has been altered in our patients with MSD.…”

Section: Discussionmentioning

confidence: 79%

“…The most commonly and traditionally used measure in this field is the spectral power or amplitude of specific frequency band, which reflects the strength of locally synchronous cortical activation. However, inconsistent results have been reported in the literature, which may be caused by the age and clinical heterogeneity of patients with CP 6 , 7 , 9 . On the other hand, the EEG measures based on functional connectivity (e.g., coherence and spatial complexity), which could quantify the statistical dependence between spatially distributed synchronous neuronal assemblies, have also been used to identify the biomarkers that could discriminate patients with CP and healthy controls 6 , 7 , 10 .…”

Section: Introductionmentioning

confidence: 98%

“…However, inconsistent results have been reported in the literature, which may be caused by the age and clinical heterogeneity of patients with CP 6 , 7 , 9 . On the other hand, the EEG measures based on functional connectivity (e.g., coherence and spatial complexity), which could quantify the statistical dependence between spatially distributed synchronous neuronal assemblies, have also been used to identify the biomarkers that could discriminate patients with CP and healthy controls 6 , 7 , 10 . Typically, hypo- or hyper-connectivity for different EEG frequency bands has been detected in individuals with CP, which supports the theory that the disrupted cerebral connectivity in individuals with CP contributes to the social, cognitive, and behavioral phenotype 10 .…”

Section: Introductionmentioning

confidence: 98%

“…Quantitative electroencephalography (EEG) has been widely used to investigate the pathophysiological underpinnings in patients with CP 6 – 8 . The most commonly and traditionally used measure in this field is the spectral power or amplitude of specific frequency band, which reflects the strength of locally synchronous cortical activation.…”

Section: Introductionmentioning

confidence: 99%

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Attenuation of temporal correlations of neuronal oscillations in patients with mild spastic diplegia

Gao

Feng

et al. 2017

Sci Rep

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The aim of this study was to investigate the temporal correlations of neuronal oscillations in patients with mild spastic diplegia (MSD). Resting-state electroencephalography (EEG) was recorded from 15 male adolescent and young adult patients with MSD and 15 healthy controls. We characterized the temporal correlations of neuronal oscillations, both on long temporal scale (i.e., >1 second) and short-to-intermediate temporal scale (i.e., <≈1 second) using detrended fluctuation analysis (DFA) and an analysis of the life- and waiting-time statistics of oscillation bursts respectively. The DFA exponents at alpha and beta bands, the life-time biomarker of alpha oscillation, and the life- and waiting-time biomarkers of beta oscillation were significantly attenuated in the patients compared with controls. Moreover, altered scalp distributions of some temporal correlation measures were found at alpha and beta bands in these patients. All these findings suggest that MSD is associated with highly volatile neuronal states of alpha and beta oscillations on short-to-intermediate and much longer time scales, which may be related to cognitive dysfunction in patients with MSD.

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Altered Resting-State EEG Microstate Parameters and Enhanced Spatial Complexity in Male Adolescent Patients with Mild Spastic Diplegia

Gao

Jia

et al. 2016

Brain Topogr

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The aim of this study was to investigate the resting-state EEG microstate parameters and spatial complexity in male adolescent patients with mild spastic diplegia (MSD). Resting-state EEG data were collected from male adolescent patients with MSD and healthy controls with eyes closed. EEG microstate and omega complexity analysis were performed. Microstate analysis revealed that the occurrence rate of microstate class A and D were significantly higher and the duration of microstate class B was significantly lower in the patients compared to healthy controls, which indicated that the temporal complexity may be higher and certain cognitive functions may be impaired in these patients. Omega complexity analysis showed that the global omega complexity of alpha-2 band was significantly higher in the patients than the controls. Besides, compared to the anterior regional omega complexities, the posterior regional omega complexities were significantly lower in the delta, theta, alpha-1 and alpha-2 bands, but significantly higher in the beta-2 and gamma-1 bands. And the regional omega complexities in the delta, theta and alpha-1 bands were significantly higher in the patients than controls. The present study reveals that in male adolescent patients with MSD, the temporal and spatial complexities of EEG signal are enhanced, which may be closely associated with the altered brain functions in these patients.

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Electroencephalographic coherence abnormalities in preterm diplegia

Cited by 12 publications

References 37 publications

Differences in somatosensory processing due to dominant hemispheric motor impairment in cerebral palsy

Differences in somatosensory processing due to dominant hemispheric motor impairment in cerebral palsy

Attenuation of temporal correlations of neuronal oscillations in patients with mild spastic diplegia

Altered Resting-State EEG Microstate Parameters and Enhanced Spatial Complexity in Male Adolescent Patients with Mild Spastic Diplegia

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