ECoG is a test that
examines the electrical potentials of the inner
ear. This can determine if there is excess
fluid pressure that can cause problems with
hearing and dizziness.
The physician places
electrodes in the ears, and other disc
electrodes are taped to the forehead. The
patient is in a comfortable reclining chair with
the room darkened. Through insert earphones,
clicks and short tones are heard in one ear at a
time. The electrodes pick up the electrical
response of the inner ear to these sounds, and
this response is displayed on a computer
screen. The audiologist conducting the test
will then interpret the response. The test
takes about one hour and results are available
to the physician shortly after the test is
finished.
