Electroencephalography

1. Cruft Coupled Circuits
1947

2. Gamma and beta bursts during working memory read-out suggest roles in its
volitional control
Mikael Lundqvist1, Pawel Herman2, Melissa R. Warden1,3, Scott L. Brincat1, and
Earl K. Miller1*
1 The Picower Institute for Learning & Memory and Department of Brain &
Cognitive Sciences, Massachusetts Institute of Technology, 43 Vassar Street,
Cambridge, MA 02139, USA.
2 Computational Brain Science Lab, Dept. Comp. Sci. & Tech, KTH Royal Institute
of Technology, Stockholm, Sweden.
3 Dept. of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853
* Corresponding author

3. Hello Asmaa, and George I have taken a look at this article and I am impressed by
it’s depth of detail and high quality. The potential ½ harmonic relationship between
the beta and gamma features brought to mind my past study of treating EEG data
in terms of classic electronic circuits. For those physiological situation where the
Theta and Alpha Rhythms are functioning as a pair of electromagnetically coupled
simple harmonic oscillators the coupling coefficient k has the form: k = X12 / [(X11)
(X22)] ^ (1/2) where the impedances’ are represented by their absolute values.
For more details see Eq. (2.1) page 177 of: Electronic circuits and tubes, by the
electronics training staff. [Editors: Harry E. Clifford and Alexander H. Wing] 1947
(Cruft Lab).