The Influence of Age and Skull Conductivity on Surface and Subdermal Bipolar EEG Leads
Figure 4
Measurement sensitivity distributions of the Visible Human Woman mapped in the logarithmic scale: (a)–(d) surface electrodes placed on the scalp solved according to the scalp-to-skull conductivity ratio mentioned in the subcaption and (e)–(h) subdermal insulated needle electrodes inserted through the skin placing the measuring tip on the skull surface solved according to the scalp-to-skull conductivity ratio mentioned in the subcaption. Scalp-to-skull conductivity ratios are specified in each subcaption: (a), (e) , (b), (f) , (c), (g) , and (d), (h) .
