Recent advances in treatment of spatial neglect: networks and neuropsychology

Carter, Alex R.; Barrett, Anna M.

doi:10.1080/14737175.2023.2221788

Cited by 2 publications

(1 citation statement)

References 177 publications

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“…Specifically, the notion of the hyperactivity of the left hemisphere as a consequence of the release from the inhibition exerted by the right hemisphere (Kinsbourne, 1977 ) may not be the primary cause of the genesis of neglect symptoms. Rehabilitation protocols based on this notion, thus, may not be effective in reducing neglect symptoms in the long term (Müri et al, 2013 ; Carter and Barrett, 2023 ). Conversely, these data and those already present in literature on neglect patients could serve in devising ah-hoc protocols taking into account the complex interplay of intra- and inter-hemispheric networks abnormalities in neglect patients (Bartolomeo, 2014 , 2019 , 2021 ; Bartolomeo and Thiebaut de Schotten, 2016 ).…”

Section: Discussionmentioning

confidence: 99%

Coherent activity within and between hemispheres: cortico-cortical connectivity revealed by rTMS of the right posterior parietal cortex

Mazzi,

Mele,

Bagattini

et al. 2024

Front. Hum. Neurosci.

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IntroductionLow frequency (1 Hz) repetitive transcranial stimulation (rTMS) applied over right posterior parietal cortex (rPPC) has been shown to reduce cortical excitability both of the stimulated area and of the interconnected contralateral homologous areas. In the present study, we investigated the whole pattern of intra- and inter-hemispheric cortico-cortical connectivity changes induced by rTMS over rPPC.MethodsTo do so, 14 healthy participants underwent resting state EEG recording before and after 30 min of rTMS at 1 Hz or sham stimulation over the rPPC (electrode position P6). Real stimulation was applied at 90% of motor threshold. Coherence values were computed on the electrodes nearby the stimulated site (i.e., P4, P8, and CP6) considering all possible inter- and intra-hemispheric combinations for the following frequency bands: delta (0.5–4 Hz), theta (4–8 Hz), alpha (8–12Hz), low beta (12–20 Hz), high beta (20–30 Hz), and gamma (30–50 Hz).Results and discussionResults revealed a significant increase in coherence in delta, theta, alpha and beta frequency bands between rPPC and the contralateral homologous sites. Moreover, an increase in coherence in theta, alpha, beta and gamma frequency bands was found between rPPC and right frontal sites, reflecting the activation of the fronto-parietal network within the right hemisphere. Summarizing, subthreshold rTMS over rPPC revealed cortico-cortical inter- and intra-hemispheric connectivity as measured by the increase in coherence among these areas. Moreover, the present results further confirm previous evidence indicating that the increase of coherence values is related to intra- and inter-hemispheric inhibitory effects of rTMS. These results can have implications for devising evidence-based rehabilitation protocols after stroke.

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Section: Discussionmentioning

confidence: 99%

Coherent activity within and between hemispheres: cortico-cortical connectivity revealed by rTMS of the right posterior parietal cortex

Mazzi,

Mele,

Bagattini

et al. 2024

Front. Hum. Neurosci.

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Posterior parietal cortical areas and recovery after motor stroke: a scoping review

Reibelt,

Quandt,

Schulz

2023

Brain Communications

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Brain imaging and electrophysiology have significantly enhanced our current understanding of stroke-related changes in brain structure and function and their implications for recovery processes. In the motor domain, most studies have focused on key motor areas of the frontal lobe including the primary and secondary motor cortices. Time- and recovery-dependent alterations in regional anatomy, brain activity and inter-regional connectivity have been related to recovery. In contrast, the involvement of posterior parietal cortical areas in stroke recovery is poorly understood although these regions are similarly important for important aspects of motor functioning in the healthy brain. Just in recent years, the field has increasingly started to explore to what extent posterior parietal cortical areas might undergo equivalent changes in task-related activation, regional brain structure and inter-regional functional and structural connectivity after stroke. The aim of this scoping review is to give an update on available data covering these aspects and thereby providing novel insights into parieto-frontal interactions for systems neuroscience stroke recovery research in the upper limb motor domain.

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Recent advances in treatment of spatial neglect: networks and neuropsychology

Cited by 2 publications

References 177 publications

Coherent activity within and between hemispheres: cortico-cortical connectivity revealed by rTMS of the right posterior parietal cortex

Coherent activity within and between hemispheres: cortico-cortical connectivity revealed by rTMS of the right posterior parietal cortex

Posterior parietal cortical areas and recovery after motor stroke: a scoping review

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