Accession Number:

ADA151699

Title:

The First Cortical Implant of a Semiconductor Multielectrode Array: Continued Data Analysis.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

• Collier,J. D.
• Mahoney,D. B.

Report Date:

1984-12-01

Pagination or Media Count:

217.0

Abstract:

Previous research conducted at the Air Force Institute of Technology AFIT, collected and partially analyzed data from a multielectrode array implanted on the visual cortex of a dogs brain. The work presented in this thesis is the completion of this data analysis. Electroencephalogram EEG recordings were made and Visual Evoked Response VER techniques were used on most of the data. The EEG strip chart recordings display evidence of low frequency alpha waves, thus indicating that the semiconductor array implant is a suitable method for extracting brain data. Summationaveraging of the data from individual electrodes illustrate that the strobe stimulus leaked into the data collection circuitry. There is evidence that the dog probably became accustomed to the strobe signals and also that the AFIT array showed signs of degradation while implanted on the cortex. A possible evoked response was found during the latter days of testing, but because of the suspected deterioration of the AFIT array, this cannot be held as certain. Included are recommendations on how the next family of AFIT multi-electrode array ICs data collection and analysis should be conducted. Originator supplied keywords include Bionies Electroencephaography EEG and Visual evoked response VER.

Descriptors:

• *VISUAL CORTEX
• *ELECTROENCEPHALOGRAPHY
• ARRAYS
• THESES
• INTEGRATED CIRCUITS
• SEMICONDUCTORS
• SIGNALS
• ELECTRODES
• STIMULI
• DETERIORATION
• DOGS
• IMPLANTATION

Subject Categories:

• Psychology
• Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE