This technology is based on the principle of recording the polarization potential or corneal-retinal potential CRP , which is the resting potential between the cornea and the retina. This potential is commonl y known as electrooculogram. EOG is a very small electrical potential that can be detected using electrodes. The EOG ranges from 0.
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This technology is based on the principle of recording the polarization potential or corneal-retinal potential CRP , which is the resting potential between the cornea and the retina.
This potential is commonl y known as electrooculogram. EOG is a very small electrical potential that can be detected using electrodes. The EOG ranges from 0. Compared with the electroencelography EEG , EOG signals have the characteristics as follows: the amplitude is relatively the same uV , the relationship between EOG and eye movements is linear, and the waveform is easy to detect.
Basically EOG is a bio-electrical skin potential measured around the eyes but first we have to understand eye itself: Introduction of Electrooculography The electrooculogram EOG is the electrical signal produced by the potential difference between the retina and the cornea of the eye.
This difference is due to the large presence of electrically active nerves in the retina compared to the front of the eye. Many experiments show that the corneal part is a positive pole and the retina part is a negative pole in the eyeball. The typical EOG waveforms generated by eye movements are shown in Fig 3. In Fig 3. Positive or negative pulses will be generated when the eyes rolling upward or downward.
The amplitude of pulse will be increased with the increment of rolling angle, and the width of the positive negative pulse is proportional to the duration of the eyeball rolling process.
When the eyes are stationary or when the eyes are looking straight ahead, there is no considerable change in potential and the amplitude of signal obtained is approximately zero. Fig 3. Similarly a downward movement of the eyes will give a similar voltage with opposite polarities to that obtained due to the left movement. The important factor regarding the EOG signal is that it does not fall in the amplitude or frequency range of the EMG signal ,thus during the process of measurement of the EOG signals ,the head or other parts of the body can be moved ,as these muscular activities will not interfere with the EOG signals and can be filtered easily.
One more interesting factor regarding the ECG signals are that, it does not interfere with the EOG signals, because when EOG is measured using precision electrodes, and as ECG is generated by the heart it does not get detected by the electrodes placed near the eye. The detection takes place as shown below. The below figure shows the method of detection of EOG signals using electrodes Fig 5.
In the process of detection, the electrodes act as a transducer converting the ion current obtained at the skin to electron current. The derivation of the EOG is achieved placing two electrodes on the outer side of the eyes to detect horizontal movement and another pair above and below the eye to detect vertical movement. Next More Seminar Topics: Are you interested in this topic. Then mail to us immediately to get the full report.
ELECTROOCULOGRAPHY SEMINAR PDF
Aragul Electrooculography Seminar Report, Abstract Activity-based sleep-wake identification in infants. The TSP conference is organized for, but not limited to, young academics, researchers and developers from different branches of telecommunication technology and signal processing. The conference covers theory, design and application of human-system interactions in the areas of science, education, business, industry, services, humanity, environment, health, and government. The TSP Conference is organized by fifteen universities from Czech Republic, Hungary, Turkey, Taiwan, Japan, Slovak Republic, Spain, Bulgaria, France, Slovenia, Croatia, and Poland, for academics, researchers, and developers and it serves as a premier annual international forum to promote the exchange of the latest advances in telecommunication technology and signal processing. The conference program will feature high-profile keynote lectures, minisymposia, workshops, invited sessions, oral and poster sessions, sessions for students and young professions, sessions for clinicians and entrepreneurs, and exhibitions. The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.
ELECTROOCULOGRAPHY SEMINAR REPORT PDF
Electrooculography, an introduction Electrooculography is the medical terminology for a method used to calculate eye movement, specifically the movement of the retina. The retina has a plus side and a minus side. This section may be confusing or unclear to readers. As it can be seen from the above figure, four to five electrodes are required for the detection of the EOG signals.
Maur To measure eye movement, pairs of electrodes are typically placed either above and below the eye or to the left and right electrooculographu the eye. Download your Reports for Electrooculography Eye movement measurement has long been an area of intense interest for researchers in a multitude of fields ranging from medicine to psychology and from advertising to computing. The resulting signal is called the electrooculogram. The TSP Conference is organized by fifteen universities ekectrooculography Czech Republic, Hungary, Turkey, Taiwan, Japan, Slovak Republic, Spain, Bulgaria, France, Slovenia, Croatia, and Poland, for academics, researchers, and developers and it serves as a premier annual international forum to promote the exchange of the latest advances in telecommunication technology and signal processing. In practice, the measurement is similar to eye movement recordings see above. Smart eyeglasses or head-mounted displays HMDs have been gaining traction as next-generation mainstream wearable devices.