Related Experiment Video
Updated: Feb 12, 2026
07:12
Evaluation of Cerebral Blood Flow Autoregulation in the Rat Using Laser Doppler Flowmetry
Published on: January 19, 2020
9.9K
Compromised Dynamic Cerebral Autoregulation in Patients with Epilepsy
Shan Lv1, Zhen-Ni Guo2, Hang Jin1
1Department of Neurology, The First Hospital of Jilin University, Changchun, China.
Biomed Research International
|March 24, 2018
Summary
Dynamic cerebral autoregulation (dCA) is impaired in epilepsy patients, particularly those with interictal slow waves. This impairment affects epilepsy patients regardless of discharge location or type, with slow waves being a key predictor.
Area of Science:
- Neurology
- Neurophysiology
Background:
- Epilepsy is a neurological disorder characterized by recurrent seizures.
- Cerebral autoregulation (CA) maintains stable cerebral blood flow despite fluctuations in systemic blood pressure.
- Dynamic cerebral autoregulation (dCA) assesses the brain's ability to regulate its own blood flow in response to changes.
Purpose of the Study:
- To investigate dynamic cerebral autoregulation (dCA) in patients diagnosed with epilepsy.
- To compare dCA parameters between epilepsy patients and healthy controls.
- To identify factors within epilepsy that influence dCA.
Main Methods:
- Recruited 100 epilepsy patients and 100 healthy controls.
- Recorded noninvasive continuous cerebral blood flow velocity (middle cerebral artery) and arterial blood pressure.
- Utilized transfer function analysis to calculate autoregulatory parameters: phase difference and gain.
Main Results:
- Epilepsy patients exhibited significantly lower phase difference compared to controls (p=0.046).
- Patients with interictal slow waves showed significantly lower phase difference than slow-wave-free patients (p=0.012).
- Interictal slow wave was identified as an independent predictor of impaired dCA in epilepsy (p=0.016).
Conclusions:
- Dynamic cerebral autoregulation (dCA) is demonstrably impaired in individuals with epilepsy.
- Interictal slow waves are a significant factor associated with impaired dCA in epilepsy patients.
- dCA impairment in epilepsy is independent of seizure discharge location or type.
More Related Videos
Related Concept Videos
01:17Autoregulation of Blood Flow
8.2K
Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
8.2K
01:24Epilepsy and Seizures: Overview
1.4K
Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
1.4K
02:20Dynamic Equilibrium
63.4K
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
63.4K
01:05Cerebral Hemispheres
2.5K
The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
2.5K
01:13Patient-centered Care
3.1K
Patient-centered care involves delivering care beyond inpatient hospitalization. Reflective practice can enhance a patient-centered approach. Reflective practice is a process of reasoning that considers all aspects of the present situation, including practicalities, learning from personal practice, and consideration of patient needs. Patients appreciate care decisions made while considering their input. Involving the patient in their care provides the patient with a sense of contribution rather...
3.1K
01:08Equation of Rotational Dynamics
14.9K
Angular variables are introduced in rotational dynamics. Comparing the definitions of angular variables with the definitions of linear kinematic variables, it is seen that there is a mapping of the linear variables to the rotational ones. Linear displacement, velocity, and acceleration have their equivalents in rotational motion, which are angular displacement, angular velocity, and angular acceleration. Similar to the rotational variables, a mapping exists from Newton's second law of motion...
14.9K