EEG脑电波
2015-06-15 12:05
218 查看
The understanding and measurement of the brain is accomplished by various means. EEG (Electroencephalogram), Computerized Axial tomography, Positron Emission tomography, Magnetic resonance imaging and Magnetoencephalography.
EEG was among the first measurements undertaken to understand the working of the brain. It is a summation of the electrical activity of the brain. The audio analogy to understanding its signal is to turn on ~100 FM radio channel’s at the same time and then
try to understand the current news channel. The interference is tremendous and researchers have used a variety of methods to understand their meaning. One way that is most common is to break up the complex wave signal into separate components or frequencies
and try to understand their meaning.
The signal that is captured is also dependent on the number of electrodes. The simplest possible is two electrodes and that is commercialized by Neurosky, and the highest number of electrodes is in the hundreds. The signal that is measured is in micro-volts
so is obviously very sensitive to any muscle movement or numerous other factors including the precise placement of the electrodes. There has been tremendous amount of work that that has been done to classify the waves into distinct patterns and also map different
regions of the brain. The discussion of classification of different frequencies is shown with their generalized function in the image but this is a large summation of the frequencies that are observed near the cortex of the brain. It is expected the frequency
would be dependent on the location where the measurement was done and the proximity of the neuron.
EEG is very accurate to determine the activity of the brain during patient brain death or other calamitous occasions. It has also been shown that the activity being
performed can change the frequency of the brain. It has been proposed that locked-in patients will be able to communicate using some form of brain frequency manipulation.
EEG was among the first measurements undertaken to understand the working of the brain. It is a summation of the electrical activity of the brain. The audio analogy to understanding its signal is to turn on ~100 FM radio channel’s at the same time and then
try to understand the current news channel. The interference is tremendous and researchers have used a variety of methods to understand their meaning. One way that is most common is to break up the complex wave signal into separate components or frequencies
and try to understand their meaning.
The signal that is captured is also dependent on the number of electrodes. The simplest possible is two electrodes and that is commercialized by Neurosky, and the highest number of electrodes is in the hundreds. The signal that is measured is in micro-volts
so is obviously very sensitive to any muscle movement or numerous other factors including the precise placement of the electrodes. There has been tremendous amount of work that that has been done to classify the waves into distinct patterns and also map different
regions of the brain. The discussion of classification of different frequencies is shown with their generalized function in the image but this is a large summation of the frequencies that are observed near the cortex of the brain. It is expected the frequency
would be dependent on the location where the measurement was done and the proximity of the neuron.
EEG is very accurate to determine the activity of the brain during patient brain death or other calamitous occasions. It has also been shown that the activity being
performed can change the frequency of the brain. It has been proposed that locked-in patients will be able to communicate using some form of brain frequency manipulation.
相关文章推荐
- 认识跟我不是志同道合的女生
- Windows 8.1下 MySQL绿色版安装配置与使用
- 可以用来做ppt的网页效果
- nginx限制ip访问(转)
- tableView左滑删除功能
- java8中的Stream
- 如何在 Linux 上用 IP转发使内部网络连接到互联网
- phpExcel导出excel
- win7下硬盘安装win7+CentOS双系统方法
- MySQL 简单存储过程实现Redis的INCR功能
- 修己
- 【算法】模拟掷骰子
- 程序员层级---程序员的10层楼
- 简述JavaScript中正则表达式的使用方法
- BigDecimal类的加减乘除
- 久邦数码:为何起大早赶晚集?
- 程序打包 之 NSIS脚本
- 微信支付.net官方坑太多,我们来精简
- PHP判断是否微新浏览器
- asp.net下拉框部分不可选与分类显示