Step # 5 – Re-Montaging and Use of Average Reference and Laplacian Norms

 

5a- Double click on the Average Reference Montage or use the Tab & Arrow keys.  

The corresponding Z scores will be displayed in the lower right Z Score window.

 

 

 

 

5b - Double click on the Laplacian Reference Montage or use the Tab & Arrow keys.   The corresponding Z scores will

be displayed in the lower right Z Score window.  Note that the scale is in microamperes because the Laplacian is an

estimate of the current flowing at right angles through the skull (Nunez, 1981; 1994; Pasqual-Marqui et al, 1988).

 

 

 

Step # 5d – Average Reference Montage Revisited

Double click on AVEREF and & move over the Z Score Power Spectrum window and

find the Highest & Lowest Z Scores in the Theta Frequencies and other frequencies. 

See the Consistencies Between the Laplacian & Average Reference & Linked Ears Norms.

 

 

 

Step # 5e – Linked Ears Reference Montage Revisited

Double click on LINKEARS Montage & Re-Examine Theta and make notes as to which Locations show

Red Z scores (i.e., > 1.96 SD).   With linked ears reference the significant Z scores are more diffuse.