Integrative parietal cortex processes: Neurological and psychiatric aspects

Teixeira, Silmar; Machado, Sérgio; Velasques, Bruna; Sanfim, Antonio; Minc, Daniel; Peressutti, Caroline; Bittencourt, Juliana; Budde, Henning; Cagy, Maurício; Anghinah, Renato; Basile, Luis; Piedade, Roberto; Ribeiro, Pedro; Diniz, Claudia; Cartier, Consuelo; Gongora, Mariana; Silva, Farmy; Manaia, Fernanda; Silva, Julio Guilherme

doi:10.1016/j.jns.2013.12.025

Cited by 59 publications

(40 citation statements)

References 153 publications

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“…11,36 The Cz derivation corresponds to Brodmann's area 5, which represents the supplementary motor area, which is a useful support for motor pattern elaborations to be sent to the primary motor area. 21 In our study, there was greater activation at C3, 2 sec before and 2 sec after the finger movement in the after-immobilization condition; this indicates more neural binding in this area due to movement planning. In a study with a hemiparetic subject, Machado et al 37 found less activation of the C3 derivation in a hemiparetic subject: they reported that this neural lesion was accompanied by lower values in the gamma band absolute power.…”

Section: ■ Discussionsupporting

confidence: 46%

“…19 Derivations C3, Cz and C4, were also selected because of their relationship with the motor cortex. 20,21 The gamma band was chosen due to its relation with motor tasks and because it is the most specific EEG band to investigate movements patterns. It may reflect the efficiency of sensory-motor integration and indicates levels of coupling between cortical areas.…”

Section: Selected Derivations and Frequency Bandmentioning

confidence: 99%

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Gamma absolute power reveals activation of motor areas after hand immobilization

Machado¹,

França²,

Teixeira³

et al. 2016

Medical Express

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OBJECTIVE:To analyze changes in gamma band absolute power in motor cortical areas, before and after a condition of hand immobilization for 48 hours. METHOD: Fifteen healthy volunteers, aged between 20 and 30, were submitted to EEG assessment before and after 48 hours of immobilization of the dominant hand, while performing a motor task triggered by a visual stimulus. A two-way repeated measures ANOVA with two within-group factors (moment x condition), each one with two levels (before vs. after visual stimuli; before vs. after 48-hour HI, respectively) was used to test for changes in beta band absolute power. RESULTS: Statistical analysis revealed that hand immobilization caused changes in cortical areas. A significant increase in gamma band absolute power was found after hand immobilization at electrodes F3 (p = 0.001) at F4 (p = 0.001) and at Fz (p = 0.001), at C3 (p = 0.001), C4 (p = 0.001) and Cz (p = 0.001). CONCLUSION: These results reveal that oscillations of the gamma band can be a cortical strategy to solve the effect of less activation due to movement restriction. Knowledge of the functioning of motor cortical areas after a condition of immobilization can lead to more effective strategies in rehabilitation.

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Section: ■ Discussionsupporting

confidence: 46%

Section: Selected Derivations and Frequency Bandmentioning

confidence: 99%

Gamma absolute power reveals activation of motor areas after hand immobilization

Machado¹,

França²,

Teixeira³

et al. 2016

Medical Express

Self Cite

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“…It is associated with lesions of the posterior parietal cortex, specifically of the superior parietal lobule and the parietal-occipital junction of the intraparietal sulcus. Functional MR brain imaging has shown activation of the precuneus, medial anterior intraparietal and superior parietal lobule during visual and non-visual reaching 2. The superior parietal lobule is the main source of visual input to the premotor and motor areas of the frontal lobe that control hand and arm movement 33.…”

Section: Optic Ataxiamentioning

confidence: 99%

“…Specifically, the premotor dorsal caudal region of the premotor cortex is active during reaching movements. Optic ataxia may be understood as a disability emerging from a disconnection between the visual input and output of motor commands or, in the terminology preferred by Marsden, a disorder of sensorimotor integration 2. There are single neurones in the parietal cortex that fire during reach movements and during the visual observation of reach movements in monkeys, suggesting that visuomotor integration is also represented at the cellular level.…”

Section: Optic Ataxiamentioning

confidence: 99%

“…Parts of the parietal association cortex are important in processing spatial information across modalities (tactile and auditory as well as visual). The parietal lobe plays a fundamental role in action prediction, observation and execution 2. It needs to process visual information on a moment-by-moment basis and provides a spatial representation that acts as a template for action 3.…”

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confidence: 99%

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Here, there and everywhere: higher visual function and the dorsal visual stream

Cooper

O’Sullivan

2016

Pract Neurol

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The dorsal visual stream, often referred to as the 'where' stream, represents the pathway taken by visual information from the primary visual cortex to the posterior parietal lobe and onwards. It partners the ventral or 'what' stream, the subject of a previous review and largely a temporal-based system. Here, we consider the dorsal stream disorders of perception (simultanagnosia, akinetopsia) along with their consequences on action (eg, optic ataxia and oculomotor apraxia, along with Balint's syndrome). The role of the dorsal stream in blindsight and hemispatial neglect is also considered.

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White matter volume in the brainstem and inferior parietal lobule is related to motor performance in children with autism spectrum disorder: A voxel‐based morphometry study

et al. 2016

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Many studies have reported poor motor performance in autism spectrum disorder (ASD); however, the underlying brain mechanisms remain unclear. Recent neuroimaging studies have suggested that abnormalities of the white matter (WM) are related to the features of ASD. In this study, we used voxel-based morphometry (VBM) to investigate which WM regions correlate with motor performance in children with ASD, and whether the WM volume in those brain regions differed between children with ASD and typically developing (TD) children. The subjects included 19 children with ASD and 20 TD controls. Motor performance was assessed using the Movement Assessment Battery for Children 2 (M-ABC 2). Children with ASD showed poorer motor performance than did the controls. There was a significant positive correlation between the total test score on the M-ABC 2 and the volume of WM in the brainstem and WM adjacent to the left supramarginal gyrus (SMG). In addition, compared with the TD controls, children with ASD had a decreased volume of WM in the brainstem and adjacent to the left intraparietal sulcus, which is close to the SMG. These findings suggest that structural changes in the WM in the brainstem and left inferior parietal lobule may contribute to poor motor performance in children with ASD. Autism Res 2016, 9: 981-992. © 2016 International Society for Autism Research, Wiley Periodicals, Inc.

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Integrative parietal cortex processes: Neurological and psychiatric aspects

Cited by 59 publications

References 153 publications

Gamma absolute power reveals activation of motor areas after hand immobilization

Gamma absolute power reveals activation of motor areas after hand immobilization

Here, there and everywhere: higher visual function and the dorsal visual stream

White matter volume in the brainstem and inferior parietal lobule is related to motor performance in children with autism spectrum disorder: A voxel‐based morphometry study

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