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Sources of error in AC measurement of skin conductance

Ørjan G.Martinsen
Ørjan G.Martinsen
, 
Oliver Pabst
Oliver Pabst
, 
Christian Tronstad
Christian Tronstad
 and 
Sverre Grimnes
Sverre Grimnes
   | Dec 29, 2015
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Article Category: Articles
Published Online: Dec 29, 2015
Page range: 49 - 53
Received: Dec 08, 2015
DOI: https://doi.org/10.5617/jeb.2640
Keywords
© 2015 Ørjan G. Martinsen, Oliver Pabst, Christian Tronstad, Sverre Grimnes, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Electrical model of skin
Electrical model of skin

Figure 2

Conductance G and Susceptance B (150 mV rms) as a function of frequency for two palmar Kandall KittyCat® electrodes. The measurements are done for two different levels of sweat activity. Average and standard deviation of 20 measurements for each of the two levels.
Conductance G and Susceptance B (150 mV rms) as a function of frequency for two palmar Kandall KittyCat® electrodes. The measurements are done for two different levels of sweat activity. Average and standard deviation of 20 measurements for each of the two levels.

Figure 3

Simultaneous measurement of AC conductance and susceptance (20 Hz, 500 mV peak amplitude) and DC conductance (500 mV) on the right palmar skin site during excitation (combing through the test subject’s hair). These measurements are done in parallel to the measurements shown in figure 2. It shows the test subject’s EDA during the whole session (20 frequency scans).
Simultaneous measurement of AC conductance and susceptance (20 Hz, 500 mV peak amplitude) and DC conductance (500 mV) on the right palmar skin site during excitation (combing through the test subject’s hair). These measurements are done in parallel to the measurements shown in figure 2. It shows the test subject’s EDA during the whole session (20 frequency scans).

Figure 4

Simultaneous measurement of AC conductance and susceptance (20 Hz, 500 mV peak amplitude) and DC conductance (500 mV) on the right palmar skin site during relaxation. These measurements are done in parallel to the measurements shown in figure 2. It shows the test subject’s EDA during the whole session (20 frequency scans).
Simultaneous measurement of AC conductance and susceptance (20 Hz, 500 mV peak amplitude) and DC conductance (500 mV) on the right palmar skin site during relaxation. These measurements are done in parallel to the measurements shown in figure 2. It shows the test subject’s EDA during the whole session (20 frequency scans).

Figure 5

The three-electrode electrical admittance measuring system, showing measuring (M), reference (R) and current carrying (C) electrodes on the skin (left) and with skin impedance and DC potential (right).
The three-electrode electrical admittance measuring system, showing measuring (M), reference (R) and current carrying (C) electrodes on the skin (left) and with skin impedance and DC potential (right).

Figure 6

Examples of simultaneously measured skin potential and conductance. From [3] with permission. Top: Highly correlated potential and conductance curves. Bottom: Example of biphasic potential curves.
Examples of simultaneously measured skin potential and conductance. From [3] with permission. Top: Highly correlated potential and conductance curves. Bottom: Example of biphasic potential curves.

Figure 7

Skin surface conductance density at 22 Hz measured with Kendall Kittycat® solid hydrogel electrode (A) and Ambu Blue Sensor® Q-00-A wet gel electrode (B) on hypothenar skin sites. From [14]. © Institute of Physics and Engineering in Medicine. Reproduced by permission of IOP Publishing. All rights reserved.
Skin surface conductance density at 22 Hz measured with Kendall Kittycat® solid hydrogel electrode (A) and Ambu Blue Sensor® Q-00-A wet gel electrode (B) on hypothenar skin sites. From [14]. © Institute of Physics and Engineering in Medicine. Reproduced by permission of IOP Publishing. All rights reserved.

Figure 8

Skin surface conductance density at 22 Hz measured with Kendall Kittycat® solid hydrogel electrode (A) and Ambu Blue Sensor® Q-00-A wet gel electrode (B) on the abdomen. From [14]. © Institute of Physics and Engineering in Medicine. Reproduced by permission of IOP Publishing. All rights reserved.
Skin surface conductance density at 22 Hz measured with Kendall Kittycat® solid hydrogel electrode (A) and Ambu Blue Sensor® Q-00-A wet gel electrode (B) on the abdomen. From [14]. © Institute of Physics and Engineering in Medicine. Reproduced by permission of IOP Publishing. All rights reserved.
eISSN:
1891-5469
Language:
English
Publication timeframe:
Volume Open
Journal Subjects:
Engineering, Bioengineering and Biomedical Engineering, Biomedical Electronics, Life Sciences, Biophysics, Medicine, Biomedical Engineering, Physics, Spectroscopy and Metrology
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