Two Devices for Analysis of Nystagmus
Abstract
Two devices are described which facilitate measurement and analysis of nystagmus. One device requires manual alignment of a crosshair with the nystagmus slope. This process is much faster than unaided manual scoring because (1) the mechanical aid in slope measurement is very effective, (2) time measurement is virtually automatic, and (3) all steps after the crosshair alignment, including tabulation of digital information and plotting of analog information, are accomplished automatically. The second device is a standard recorder with plug-in units for area-summation and timed switching. It is less versatile than the first device, and is not equivalent to advanced electronic computation, but it does provide an immediate analog display and (with a digital voltmeter-printer) an immediate digital display of analyzed nystagmus. Additional operations performed on the output of these devices can provide estimates of the pi/delta time constant and other parameters. Topics discussed include sources of error in rapid processing of nystagmus and advantages of rapid processing for experimental purposes, for pilot evaluation, and for clinical application.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 31, 1967
- Accession Number
- AD0664209
Entities
People
- Fred Jr E. Guedry
- Gene T. Turnipseed
Organizations
- Naval Aerospace Medical Institute