Measuring interconnection of the residual cortical functional islands in persistent vegetative state and minimal conscious state with EEG nonlinear analysis
| Autor: | Wei qun Song, Dong yu Wu, Gui Cai, Jie Wang, Ying Yuan, Richard D. Zorowitz |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male Consciousness Traumatic brain injury Awareness level Electroencephalography Residual Physiology (medical) medicine Humans Aged Aged 80 and over Cerebral Cortex Brain Mapping Interconnection medicine.diagnostic_test Persistent Vegetative State Significant difference Unconsciousness Conscious State Middle Aged medicine.disease Sensory Systems Acoustic Stimulation Nonlinear Dynamics Neurology Brain Injuries Female Neurology (clinical) Nerve Net medicine.symptom Psychology Neuroscience |
| Zdroj: | Clinical Neurophysiology. |
| ISSN: | 1388-2457 |
| DOI: | 10.1016/j.clinph.2011.03.018 |
| Popis: | Objectives The aim of the study is to investigate the cortical response to painful and auditory stimuli for subjects in persistent vegetative state (PVS) and minimal conscious state (MCS), and measure the interconnection of the residual cortical functional islands with electroencephalographic (EEG) nonlinear dynamic analysis (NDA). Methods Thirty PVS subjects, 20 MCS subjects and 30 subjects in normal conscious state (NCS) were involved in the study. EEG was recorded under three conditions: eyes closed, auditory stimuli and painful stimuli. EEG nonlinear index of cross-approximate entropy (C-ApEn) was calculated for all subjects. Results Interconnection of local and distant cortical networks of patients in PVS was generally suppressed, and painful or auditory stimulation could hardly cause any activation of associative cortices. Instead, interconnection of local cortical networks of patients in MCS improved significantly. The only significant difference with the NCS existed in the unaffected distant cortical networks. Conclusions Interconnection of local and distant cortical networks in MCS is superior to that of PVS. NDA could measure interconnection of the residual cortical functional islands with associative cortices in the unconscious patients. Significance NDA can characterise the interconnection of cortical networks for the unconscious state and provide some information of unconsciousness at the awareness level. |
| Databáze: | OpenAIRE |
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