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Although the words have different lengths, it is not evident from the EEG. On the other side, EEG is almost always corrupted by noise and lacks any “structure”, making decoding imagined speech from EEG more challenging.Īs an illustration, immediately below are shown the EEG signals captured from a subject when he imagined speaking the words “in” and “cooperate”, respectively. What makes EEG the most popular choice is the fact that it has good temporal resolution, is non-invasive, and more affordable.
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There are several limitations of EEG when compared to other modalities such as fMRI (functional magnetic resonance imaging) and fNIRS (functional near-infrared spectroscopy).
![eeg reading eeg reading](http://www.qeeg.com/NormalMaleEEGEC.jpg)
Why EEG instead of fMRI, fNIRS or other methods?Īs mentioned in our new review article in Frontiers in Neuroscience, EEG is not the only choice of method for decoding imagined speech, but it is the most popular. What makes EEG the most popular choice is the fact that it has good temporal resolution, is non-invasive, and more affordable Jerrin Thomas Panachakel & Ramakrishnan Ganesan
![eeg reading eeg reading](https://i.ytimg.com/vi/YqwkvdIdBCk/maxresdefault.jpg)
Even when someone’s muscles are paralyzed and one is not able to move one’s articulators, one can still imagine speaking or actively think. Unlike the overt speech in a conversation with another person, there is no movement of the articulators in speech imagery. This is called speech imagery or covert speech.
#Eeg reading how to
We rehearse over and over again how to manage a particular difficult situation, what to talk to a prospective customer, how to answer certain critical questions in an interview, and so on. EEG is also one of the most popular tools used in an attempt to decode speech imagery to enable mind reading.Īs human beings, we talk within us most of the times. EEG is currently widely used in medicine for capturing the electrical activity of the brain. Although he failed to make mind reading a success, the efforts led to the invention of electroencephalography (EEG). The first reported work of creating a synthetic mind-reading system making using of electrical activities of the brain was by Dr Hans Berger (1873-1941), a German psychiatrist. Although mind reading is so far been a theme in science fiction, scientists have now shown that it could soon become reality. Mind reading (or telepathy) is the ability to transfer thoughts from one person to another without using the usual sensory channels of communication such as speech. Here, they give an introduction to this rapidly growing field, specifically written for laypersons. Together they recently published a review article in Frontiers in Neuroscience, where they give a comprehensive synthesis of research over the last decade on decoding imagined speech from EEGs, from electronic design to extracting and categorizing words. His thesis advisor, Dr Angarai Ganesan Ramakrishnan is a Senior Professor of electrical engineering at IIS and Head of the Medical Intelligence and Language Engineering laboratory. He studies the use of artificial intelligence (so-called “Deep Learning”) to extract “imagined speech” - that is, thinking in the form of sound but not expressed in words or gestures - from EEG readings. Jerrin Thomas Panachakel is a PhD candidate at the Department of Electrical Engineering at the Indian Institute of Science (IIS), Bangalore. By Jerrin Thomas Panachakel and Dr Angarai Ganesan Ramakrishnan, Department of Electrical Engineering, Indian Institute of Science Credit: YAKOBCHUK VIACHESLAV /