Document Type



Master of Science (MS)


Electrical Engineering

First Advisor's Name

Armado Barreto

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Ozcan Ozdamar

Third Advisor's Name

Malcom Heimer

Date of Defense



The goal of this study was to develop two computer-controlled visual evoked potential (VEP) stimulators. The first device employs a 12 x 12 matrix of 5 mm square Light Emitting Diodes (LEDs) and is housed in an 8 x 8 utility box structure. The second device employs two 8x8 matrices of 3 mm square LEDs, each housed in one eyepiece of a goggle-like structure. A quantitative comparison of the performance of these stimulators was carried out in terms of absolute and interpeak latencies, signal-to-noise ratio (SNR) and cross-correlation between sequential responses obtained from them. Six normal adult subjects were involved in the comparison. Data were acquired from monocular full-field stimulation. The comparison emphasizes potential advantages of the newer, goggle- mounted stimulator.





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