• A
  • A
  • A
  • ABC
  • ABC
  • ABC
  • А
  • А
  • А
  • А
  • А
Regular version of the site

Student
Title
Supervisor
Faculty
Educational Programme
Final Grade
Year of Graduation
Elizaveta Okorokova
Operant Conditioning of the Sensori-Motor Rhythm in the Neurofeedback Paradigm for Endogenous Enhancement of Motor-Imagery Brain-Computer Interface
2016
Motor Imagery Brain Computer Interface (BCI) is based on a principle that during real/imaginary movement of a certain part of the body we can observe desynchronization of the mu rhythm (8-12 Hz) in area of sensorimotor cortex, which corresponds to this body part representation. By detecting this desynchronization with one of the neuroimaging techniques, such as Electroencephalography (EEG), it is possible to predict what kind of movement the person is currently doing or thinking about. Such interfaces are attractive not only to the general public (e.g. new commercial products with easier control), but also to patients with severe motor dysfunction, who can use them for rehabilitation and operation of external devices (e.g. wheelchair). However, most people with motor impairments do not have a pronounced mu rhythm, which automatically makes such interfaces ineffective for them. In this thesis we propose to facilitate motor-imagery BCI with neurofeedback training, a methodology used to control the subject’s brain states by means of operant conditioning. We predict that increasing the power of mu-rhythm with Neurofeedback will allow the user to gain better control of the motor imagery BCI. We provide results of our pilot control experiment, in which 25 participants tested a joint NFB-BCI paradigm. We were able to show a significant increase of the mu-power in the experimental group. However, the associated increase in mu-desynchronization was not enough to improve the quality of motor-imagery BCI.

Student Theses at HSE must be completed in accordance with the University Rules and regulations specified by each educational programme.

Summaries of all theses must be published and made freely available on the HSE website.

The full text of a thesis can be published in open access on the HSE website only if the authoring student (copyright holder) agrees, or, if the thesis was written by a team of students, if all the co-authors (copyright holders) agree. After a thesis is published on the HSE website, it obtains the status of an online publication.

Student theses are objects of copyright and their use is subject to limitations in accordance with the Russian Federation’s law on intellectual property.

In the event that a thesis is quoted or otherwise used, reference to the author’s name and the source of quotation is required.

Search all student theses