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2.0 Hz anyone..?..

Thu Oct 10 14:35:00 EST 1991

Hello everyone:

I am currently doing research on motor control using the EEG/ERP as a 
primary data source. Recently I've found a 2.0 Hz oscillation from 
leads over the motor cortices (bilateral) which shows changes in 
magnitude as a function of the velocity of an upcoming movement. In 
other words these changes occur in the EEG before the onset of 
muscular activity. Furthermore, these changes display magnitude 
changes over the hemisphere contralateral to the side of movement. 
I am aware of all the research looking at the "Bereitschaftspotential"
(readiness potential), but I have not been able to find any 
correspondence to the 2.0 Hz phenomenon on other levels. For instance 
there is much research linking effects similar to the 
Bereitschaftspotential to single cell firing patterns in the motor 
cortex of non-human primates. Also, there has been work in the 
frequency domain where slower oscillations were found (ie 0.5 Hz).

Is there anyone out there who has seen or done work on the single cell 
level or even using local field measurements who has also seen a 
similar 2.0 Hz effect? Of particular interest would be prior to or 
during a controlled motor event..

				Thanks in advance..

 Gene V. Wallenstein          
 Center for Complex Systems and Brain Sciences           
 Florida Atlantic University, Boca Raton, FL. 33431 USA        
 Wallenstein at Walt.ccs.fau.edu

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