Neurophysiological assessment for evaluating residual cognition in vegetative and minimally conscious state patients: a pilot study

Salvo, Simona De; Caminiti, Fabrizia; Cola, Maria Cristina De; Corallo, Francesco; Caizzone, Antonino; Rifici, Carmela; Bramantı, Placido; Marıno, Silvia

doi:10.11138/fneur/2015.30.4.237

Cited by 18 publications

(21 citation statements)

References 20 publications

(18 reference statements)

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“…In particular, the use of sensorial methods provides several advantages for rehabilitation. Studies demonstrated a correlation between sensory stimulation and changes in patient's clinical status (De Salvo, Caminiti et al, ; De Salvo, Naro et al, ). Several studies described patients with cognitive dysfunctions treated by a specific cognitive rehabilitative program (Calabrò et al, ; Coughlin, Miller, & Schuette, ; Takagi & Miyamoto, ).…”

Section: Discussionmentioning

confidence: 98%

“…Electroencephalographic (EEG) evaluation was performed at baseline, and after 4 months: it showed altered electrical brain activity due to the presence of slow polymorphous waves (theta and delta rhythms) prevalent in left hemisphere. In addition, we performed Laser‐Evoked Potentials (LEPs) examination to evaluate sensory and nociceptive system (De Salvo, Caminiti et al, ; De Salvo, Naro et al, ) and Event‐Related Potentials (ERPs) assessment to explore residual cortical cognitive functions (De Salvo, Caminiti et al, ; De Salvo, Naro et al, ).…”

Section: Case Descriptionmentioning

confidence: 99%

“…We used Neurowave System to perform multisensory stimulation and analyze biophysical parameters (De Salvo, Caminiti et al, ; De Salvo, Naro et al, ). The ERPs recorded, showed moderate improvement between T0–T1.…”

Section: Case Descriptionmentioning

confidence: 99%

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A multidisciplinary approach to assess recovery of consciousness in a patient with moyamoya disease

et al. 2019

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Introduction Moyamoya disease (MMD) meaning “hazy puff of smoke” in Japanese is a rare chronic cerebrovascular syndrome characterized by progressive stenosis and occlusion of the internal carotid arteries (ICAs) anterior cerebral arteries (ACAs), and middle cerebral arteries (MCAs). Methods Our moyamoya patient with severely impaired cognitive and motor functions underwent a specific motor and neuropsychological rehabilitative treatments to assess the recovery of consciousness. Results Results obtained showed an improvement of clinical and neuropsychological examination. These findings highlighted the importance of an intensive rehabilitation techniques used in the care of disorders of consciousness patients. Conclusions The use of sensory methods provides advantages for the rehabilitation. In fact, in this study, we showed a correlation between sensory stimulation and changes in patient's clinical status.

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Section: Discussionmentioning

confidence: 98%

Section: Case Descriptionmentioning

confidence: 99%

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A multidisciplinary approach to assess recovery of consciousness in a patient with moyamoya disease

et al. 2019

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“…However, most ERP measures require a fairly high amount of repetitions (> 100 trials) to achieve sufficiently high signal to noise ratio, and are dependent on both intact pathways for sensory processing and attention to the signal (King et al, 2013) . Further, because the N100 requires multiple repetitions for obtaining a good signal to noise ratio, several studies performed the analysis at the group level (De Salvo, 2015;Yppärilä et al, 2004) and it is far from clear how reliable the N100 is on the individual level since 24% of coma patients also showed a N100 response different from baseline in one study (Daltrozzo et al, 2009) .…”

Section: Auditory Evoked Potential At ~100ms (Aep N100)mentioning

confidence: 99%

Proposed EEG measures of consciousness: a systematic, comparative review.

Nilsen¹,

Juel²,

Thürer³

et al. 2020

Preprint

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Knowledge of which brain properties are required for consciousness is essential for improving clinical diagnostics and therapy as well as for investigating consciousness per se. The search for such properties has yielded many methods and measures for distinguishing conscious and apparently unconscious brain states. Here, we present a systematic literature review of 255 electroencephalography (EEG)-based measures of consciousness in humans. We show that measures based on signal diversity and event related potentials appear to be the most consistent. Specifically, spectral entropy, Lempel Ziv complexity, and spectral edge frequency, seem most practical, consistent, and reproducible. However, since most studies did not collect current or retrospective subjective reports about experiences, the states of consciousness were usually assessed from behavior. Hence, the ground truth about presence or absence of phenomenological experience in such cases is often uncertain, thus limiting the conclusions that can be drawn. We provide detailed overviews of general categories and specific measures of consciousness, to serve as a basis for further studies and future development.

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“…Electroencephalography (EEG) is a neurophysiological technique that collects at the scalp the electrical potentials produced by the bio-electromagnetic fields generated by the intra- and extra-cellular current flows related to neuronal activity. EEG is widely used in neurology because many neurological disorders cause an impairment in the electrical activity of the brain [1,2,3,4,5]. EEG offers a very high temporal resolution together with a poor spatial resolution, either because of volume conduction effects [6] or because of the large inter-electrode distance that characterizes standard 10/20 EEG montage (represented with black electrodes in Figure 1b), which is 7 cm on average.…”

Section: Introductionmentioning

confidence: 99%

Compressibility of High-Density EEG Signals in Stroke Patients

Mammone

Salvo

Ieracitano

et al. 2018

Sensors

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Stroke is a critical event that causes the disruption of neural connections. There is increasing evidence that the brain tries to reorganize itself and to replace the damaged circuits, by establishing compensatory pathways. Intra- and extra-cellular currents are involved in the communication between neurons and the macroscopic effects of such currents can be detected at the scalp through electroencephalographic (EEG) sensors. EEG can be used to study the lesions in the brain indirectly, by studying their effects on the brain electrical activity. The primary goal of the present work was to investigate possible asymmetries in the activity of the two hemispheres, in the case one of them is affected by a lesion due to stroke. In particular, the compressibility of High-Density-EEG (HD-EEG) recorded at the two hemispheres was investigated since the presence of the lesion is expected to impact on the regularity of EEG signals. The secondary objective was to evaluate if standard low density EEG is able to provide such information. Eighteen patients with unilateral stroke were recruited and underwent HD-EEG recording. Each EEG signal was compressively sensed, using Block Sparse Bayesian Learning, at increasing compression rate. The two hemispheres showed significant differences in the compressibility of EEG. Signals acquired at the electrode locations of the affected hemisphere showed a better reconstruction quality, quantified by the Structural SIMilarity index (SSIM), than the EEG signals recorded at the healthy hemisphere (p < 0.05), for each compression rate value. The presence of the lesion seems to induce an increased regularity in the electrical activity of the brain, thus an increased compressibility.

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Neurophysiological assessment for evaluating residual cognition in vegetative and minimally conscious state patients: a pilot study

Cited by 18 publications

References 20 publications

A multidisciplinary approach to assess recovery of consciousness in a patient with moyamoya disease

A multidisciplinary approach to assess recovery of consciousness in a patient with moyamoya disease

Proposed EEG measures of consciousness: a systematic, comparative review.

Compressibility of High-Density EEG Signals in Stroke Patients

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