|
Biological Signals Acquisition |
EOG tests > procedure |
| |
Horizontal
EOGs in these experiments will be recorded with
silver/silver chloride surface electrodes. These
electrodes have been specially designed for
recording potentials from the skin. |
| |
|
| |
 |
 |
Thoroughly
clean the skin on the side of each eye
(the area between the eye and the
hairline) and in the middle of the
subject's forehead with alcohol pads. Dry
the cleansed surface with a gauze pad.
The correct locations for the placement
of each electrode is illustrated to the
right below. |
| Have the
subject look straight ahead. Place
an electrode, with its long axis vertical,
between the hairline and the corner of
each eye, centering it to match the
position of the pupil of the subject's
eye. Place the third electrode in the
center of the subject's forehead. |
|
Connect the
EOG electrodes to the cable provided.
Attach the yellow and orange connectors
to the electrodes near the eyes, and the
green electrode to the reference
electrode in the center of the head. |
| The electrode
leads are fed to the isolated amplifier
in the interface panel. The output
signal from this amplifier is sent to the
A/D board in the computer to be sampled. |
|
To continue with the next
topic, Saccades, click here |