UCL Discovery Stage
UCL home » Library Services » Electronic resources » UCL Discovery Stage

EEG Fractal Analysis Reflects Brain Impairment after Stroke

Rubega, M; Formaggio, E; Molteni, F; Guanziroli, E; Di Marco, R; Baracchini, C; Ermani, M; ... Del Felice, A; + view all (2021) EEG Fractal Analysis Reflects Brain Impairment after Stroke. Entropy , 23 (5) p. 592. 10.3390/e23050592. Green open access

[thumbnail of Ward_EEG Fractal Analysis Reflects Brain Impairment after Stroke_VoR.pdf]
Preview
Text
Ward_EEG Fractal Analysis Reflects Brain Impairment after Stroke_VoR.pdf - Published Version

Download (7MB) | Preview

Abstract

Stroke is the commonest cause of disability. Novel treatments require an improved understanding of the underlying mechanisms of recovery. Fractal approaches have demonstrated that a single metric can describe the complexity of seemingly random fluctuations of physiological signals. We hypothesize that fractal algorithms applied to electroencephalographic (EEG) signals may track brain impairment after stroke. Sixteen stroke survivors were studied in the hyperacute (<48 h) and in the acute phase (∼1 week after stroke), and 35 stroke survivors during the early subacute phase (from 8 days to 32 days and after ∼2 months after stroke): We compared resting-state EEG fractal changes using fractal measures (i.e., Higuchi Index, Tortuosity) with 11 healthy controls. Both Higuchi index and Tortuosity values were significantly lower after a stroke throughout the acute and early subacute stage compared to healthy subjects, reflecting a brain activity which is significantly less complex. These indices may be promising metrics to track behavioral changes in the very early stage after stroke. Our findings might contribute to the neurorehabilitation quest in identifying reliable biomarkers for a better tailoring of rehabilitation pathways.

Type: Article
Title: EEG Fractal Analysis Reflects Brain Impairment after Stroke
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/e23050592
Publisher version: https://doi.org/10.3390/e23050592
Language: English
Additional information: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords: neurophysiology; stroke; EEG; neuroplasticity; fractal analysis
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Movement Neurosciences
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10128530
Downloads since deposit
882Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item