Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- EMG Switch(also: Electromyography Switch, Muscle Signal Switch)
- An assistive technology switch that detects electrical signals produced by muscle contractions (electromyography) to generate a switch activation. EMG switches can detect even very small muscle movements, such as a slight facial twitch or jaw clench, making them suitable for…
- Electroencephalography(also: EEG)
- A non-invasive method of recording electrical activity of the brain using electrodes placed on the scalp. In assistive technology, EEG is the primary sensing technology behind brain-computer interfaces (BCIs), which allow people with severe motor impairments such as paralysis or…
- Electromagnetic Tracking(also: Magnetic Tracking, 6-DOF Tracking)
- Electromagnetic tracking is a position and orientation sensing technology that uses electromagnetic fields to determine the location and rotation of a sensor in three-dimensional space. Systems like the Polhemus tracker generate a low-frequency magnetic field from a stationary…
- Electrooculogram(also: EOG, Electrooculography)
- The electrooculogram (EOG) is a technique for measuring the electrical potential difference between the front and back of the eye using surface electrodes placed around the eyes. This corneal-retinal potential (CRP) varies linearly with eye rotation along both horizontal and…
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