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Improving Steady State Visual Evoked Potentials Responses from LED Stimuli Through Orientation Analysis

Mouli, Surej, Palaniappan, Ramaswamy, Siliitoe, Ian (2015) Improving Steady State Visual Evoked Potentials Responses from LED Stimuli Through Orientation Analysis. Journal of Medical Imaging and Health Informatics, 5 (5). pp. 1070-1075. ISSN 2156-7018. E-ISSN 2156-7026. (doi:10.1166/jmihi.2015.1496) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:49532)

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https://doi.org/10.1166/jmihi.2015.1496

Abstract

This article focuses on different orientations of LED visual stimulus configurations which could be used to elicit Steady State Visual Evoked Potentials (SSVEP). SSVEP is extensively used in the research for various biomedical applications and require a configurable light source flickering at a constant frequency that would induce responses in corresponding frequencies in the EEG recorded over the visual cortex area of the scalp. The present study investigated the SSVEP amplitude dependence of horizontal and vertical LED visual stimulus orientations. SSVEP amplitudes were compared for five healthy subjects from five sessions of 30 seconds each and the recorded EEG signals were analysed. Individual recording sessions were carried out with horizontal and vertical orientation with 10 Hz visual stimulus for analysing the SSVEP responses and also to evaluate the viewing comfort in each orientation. The signals were processed with band-pass filtering and analysed with Fast Fourier Transform (FFT) and autoregressive spectral analysis. The sign rank statistical results showed horizontal visual stimulus gave the higher response and viewing comfort in all subjects in comparison to vertical orientation.

Item Type: Article
DOI/Identification number: 10.1166/jmihi.2015.1496
Subjects: Q Science > QA Mathematics (inc Computing science)
Divisions: Faculties > Sciences > School of Computing > Data Science
Depositing User: Palaniappan Ramaswamy
Date Deposited: 15 Jul 2015 11:20 UTC
Last Modified: 29 May 2019 14:51 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49532 (The current URI for this page, for reference purposes)
Palaniappan, Ramaswamy: https://orcid.org/0000-0001-5296-8396
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