- Frequency: 8-12 Hz
- More sharply than Alpha rhythm
- Most prominent in central regions
- Frequency asymmetry of >1 Hz is abnormal
- Mu rhythm is suppressed by contralateral opening and closing of the fist.
Mu rhythm in a 5 year old boy (source)
Mu reactivity, by closing the left fist in a 65 year old woman with eyes opened (source)