A turn-key transportable eye-tracking instrument for clinical assessment.

Full Abstract

This paper describes a combined instrument (eye tracker and target generator, both head mounted, with integrated data analysis) that tests parameters of saccadic eye movement and fixation control to give insight into the status of functional brain systems. Using three minilasers, the target generato rprojects three visual stimuli, a fixation point and two lateral stimuli, with programmable timing. The controller allows the selection of overlap, 200-msec gap, or remembered saccade trials. Size, maximal velocity, and reaction time are determined for each primary saccade. The number of prosaccades and antisaccades are counted. More saccades--for example, the occurrence and latency of corrective saccades--may be evaluated off line by an interactive PC analysis program. The eye position data can be transferred to a PC. Off-line analysis compares each observed variable relative to an age-matched control group (300 healthy control subjects 7-70 years of age, tested in the overlap condition with prosaccade instructions and in the gap condition with antisaccades). The diagnostic results can be used to elaborate an individual optomotor training program.

Learn Faster Today Improve your study skills

Author information

Author/s: Hartnegg, Klaus (K); Fischer, Burkhart (B);

Affiliation: Optomotor Laboratory, University of Freiburg, Freiburg, Germany. hartnegg(-atsign-)uni-freiburg.de

Journal and publication information

Publication Type: Journal Article

Journal: Behavior research methods, instruments, & computers : a journal of the Psychonomic Society, Inc (Behav Res Methods Instrum Comput), published in United States. (Language: eng)

Reference: 2002-Nov; vol 34 (issue 4) : pp 625-9

Dates: Created 2003/02/04; Completed 2003/03/03; Revised 2004/11/17;

PMID: 12564566, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

External Links for this article (including full text providers, if available):

Click Electronic Full-text Provider Links to see options for finding the electronic full text links to this article. Note there may be a subscription or fee required for access to the full text. See our FAQ for information on finding FREE full text articles.

This article may also be located in paper journal collections available in many libraries. Use the Journal and Publication Information above to find the full article.

MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Fixation, Ocular - physiology
Humans
Saccades - physiology

Saccades - physiology
Schizophrenia - diagnosis
Teaching - methods

These are the highest related articles currently in the database:

See 100+ related articles.