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Othman AS, Abd-Allah F. Non-Convulsive Status Epilepticus (NCSE) in ICU: Bedside Usefulness of TCD in Comatose Patient Diagnosis. When the EEG Is Too Far. NEUROSONOLOGY IN CRITICAL CARE 2022:753-762. [DOI: 10.1007/978-3-030-81419-9_46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Peng B, Li J, Li X, Wang X, Zhu H, Liang W, Liang H, Chen W. Neuropsychological Deficits in Patients with Electrical Status Epilepticus During Sleep: A Non-invasive Analysis of Neurovascular Coupling. Brain Topogr 2020; 33:375-383. [PMID: 32128654 DOI: 10.1007/s10548-020-00759-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 02/21/2020] [Indexed: 12/01/2022]
Abstract
To evaluate the effects of electrical status epilepticus during sleep (ESES) on cerebral blood flow (CBF) and explore the associated neuro-vascular coupling and neuropsychological deficits. 19 ESES patients were recruited to undergo real-time transcranial doppler ultrasonography (TCD) and video-EEG monitoring (vEEG). Patients were grouped based on their cognitive functions or their EEG patterns. The mean cerebral blood flow velocity (CBFVm) of the unilateral middle cerebral artery was measured using TCD and was used to calculate various relevant parameters. The 19 patients participated in a total of 54 effective TCD-vEEG monitoring sessions. We found a significant effect of clinical severity for the following measurements: spike wave index (SWI), peak and average deep sleep stage (N3) CBFVm, peak, average and minimum deep sleep and awake CBFVm, and CBFVm oscillations during deep sleep. Nevertheless, CBFVm oscillations were not related to SWI. Furthermore, CBFVm oscillations revealed a statistically significant difference between the near-ESES and asymmetric-ESES groups. CBFVm oscillations may reflect the neuro-vascular coupling process associated with ESES disfunction. Understanding the relationship between CBFVm oscillations and epileptic activity will be important for assessing the neuropsychological damage associated with ESES and for developing treatment options for this and other diseases.
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Affiliation(s)
- Bingwei Peng
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China.
| | - Jialing Li
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China
| | - Xiaojing Li
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China
| | - Xiuying Wang
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China
| | - Haixia Zhu
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China
| | - Wei Liang
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China
| | - Huici Liang
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China
| | - Wenxiong Chen
- Department of Neurology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 318# Ren Min Road, Guangzhou, Guangdong, 510120, P.R. China
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Alam M, Ahmed G, Ling YT, Zheng YP. Measurement of neurovascular coupling in human motor cortex using simultaneous transcranial Doppler and electroencephalography. Physiol Meas 2018; 39:065005. [PMID: 29799813 DOI: 10.1088/1361-6579/aac812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Event-related desynchronization (ERD) is a relative power decrease of electroencephalogram (EEG) signals in a specific frequency band during physical motor execution, while transcranial Doppler (TCD) measures cerebral blood flow velocity. The objective of this study was to investigate the neurovascular coupling in the motor cortex by using an integrated EEG and TCD system, and to find any difference in hemodynamic responses in healthy young male and female adults. APPROACH Thirty healthy volunteers, aged 20-30 years, were recruited for this study. The subjects were asked to perform a motor task for the duration of a provided visual cue. Simultaneous EEG and TCD recording was carried out using a new integrated system to detect the ERD arising from the EEG signals, and to measure the mean blood flow velocity of the left and right middle cerebral arteries from bilateral TCD signals. MAIN RESULTS The results showed a significant decrease in EEG power in the mu band (7.5-12.5 Hz) during the motor task compared to the resting phase. It showed significant increase in desynchronization on the contralateral side of the motor task compared to the ipsilateral side. Mean blood flow velocity during the task phase was significantly higher in comparison with the resting phase at the contralateral side. The results also showed a significantly higher increase in the percentage of mean blood flow velocity in the contralateral side of motor task compared to the ipsilateral side. However, no significant difference in desynchronization or change of mean blood flow velocity was found between males and females. SIGNIFICANCE A combined TCD-EEG system successfully detects ERD and blood flow velocity in cerebral arteries, and can be used as a useful tool to study neurovascular coupling in the brain. There is no significant difference in the hemodynamic responses in healthy young males and females.
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