I have been looking deeper in to some of the alternative methods of BCI as I feel that we will need to exlain the methods and the reasons why we are going with our chosen method of implementation (EEG) when writing our dissertation, so i have done a bit of research and reading in to some of the underlying background material so that the blog will contain the thory and back ground of our project aswell as the just the progression of the project so that we have all relevant info in one place
This post contains info on fMRI.
From my reading here is some stuff which i wish to highlight:
With this method brain activity in measured by detecting changes associated with blood flow. The scan produces a map of the nueral activity of the brain (or spinal chord).
The use of EEGs has some benefits compared to fMRI:
-Rarely used for BCI as it depends on the movement of fluids inside the body tissues and so it is a much slower form of measuring the brains activity
- Hardware costs are significantly lower
- More mobile
- Higher temporal resolution, on the order of milliseconds, rather than seconds
- More tolerant of subject movement
- EEG is silent, which allows for better study of the responses to auditory stimuli
- Does not aggravate claustrophobia
Heres a link to someuseful info: http://science.howstuffworks.com/fmri.htm
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