User Tutorial:Introduction to the Mu Rhythm: Difference between revisions
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==Behavioral Properties== | ==Behavioral Properties== | ||
*Amplitude modulation by intended or imagined movement | *Amplitude modulation by intended or imagined movement | ||
==Physical Properties== | ==Physical Properties== | ||
*Origin in the sensorimotor cortex | |||
*Arc-shaped, periodic wave form, corresponding to a line spectrum with a strong first harmonic | *Arc-shaped, periodic wave form, corresponding to a line spectrum with a strong first harmonic | ||
*Dipolar source character, connection with cortical surface | *Dipolar source character, connection with cortical surface | ||
Revision as of 17:18, 23 August 2007
Behavioral Properties
- Amplitude modulation by intended or imagined movement
Physical Properties
- Origin in the sensorimotor cortex
- Arc-shaped, periodic wave form, corresponding to a line spectrum with a strong first harmonic
- Dipolar source character, connection with cortical surface
- Typical scalp potential distributions
BCI Construction
- By imagination of movement, a human subject can wilfully influence the amplitude of her/his mu rhythm. Continuous feedback of mu rhythm amplitude can help improve this natural ability by selective reinforcement of successful strategies.
- Much like a historic AM radio receiver, a mu rhythm BCI treats the mu rhythm as a carrier signal with information impressed on it by amplitude modulation.
- BCI operation consists of
- spatial selection (spatial filter <-> directional antenna)
- frequency selection (classifier <-> tuning wheel)
- carrier demodulation (spectral amplitude <-> rectifier diode)
Practical Aspects
- How to localize the motor cortex with the help of an EEG cap
- Suggested movement imagination