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Attentive Memory Comparison between Tinnitus Group and Normal Hearing Group Using Electroencephalogram

Alavi, Ali | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49775 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Jahed, Mehran; Mahmoudian, Saeed
  7. Abstract:
  8. Tinnitus is understood to be a repeating sound, often in the form of a ringing in one or both ears, in the absence of any external stimulus. There is no definite scientific justification for this condition, but this complication usually occurs due to hearing loss or after aging or acute trauma. A recent community-based epidemiological study found that 17.5% of 60-year-olds and older were suffering from Tinnitus. Despite the significant outbreak and the great impact of this impairment on the quality of life of people with this condition, no definitive treatment has been provided so far. Therefore, further research in this field is of great importance. One of the tools used to carry out these studies is the use of brain electrical activity as a raw signal or event related potential (ERP). ERP is a measure of the electrical activity at the brain surface at a given time. It represents the brain processing in a specific phase and is the direct result of a specific sensory, cognitive, or motor event. One of the most well known of these potentials is the P300 wave, which can be registered under special conditions of stimulant delivery through various different stimulation. These stimuli may include a train of audio or visual stimulations that might be different in variables such as frequency, amplitude, type of stimuli and the like. The P300 reflects the attention and memory processes associated with neural changes caused by audio and video stimuli. Different regions of the brain are involved in producing the P300 wave.In this project, a comparison is made in attention memory between those with Tinnitus and those with normal hearing using different stimulation method for audio and visual actuators in addition to P300 waves methods. The results of this study indicate that there is no significant difference in attention memory between the two groups. Based on these results the measured characteristics of the P300 waveform produced by audio and visual stimuli such as amplitude and delay do not show any meaningful difference between the two groups. Definitive and more meaningful comment and conclusion on the attention of people with Tinnitus requires further research in this area
  9. Keywords:
  10. Tinnitus ; Event Related Potential (ERP) ; P300 Wave ; Electroencephalography

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