The Application of Smooth Pursuit Eye Movement Analysis to Clinical Medicine

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Abstract:

We analyzed pursuit racking eye movements from selected neurological patients and compared them to the responses of 20 normal subjects. The patientssubjects tracked a small spot of light moving sinusoidally in the horizontal plane at a frequency of 0.4 Hz and a peakto-peak amplitude of 40 . The eye-movement responses were separated into a smooth-pursuit component and a saccadic component. We calculated the asymmetry as well as the gain and phase response of the smooth-pursuit component. The saccadic component was quantified by calculating the percentage of the total tracking movement contributed by the saccadic system. The patients with smooth-pursuit impairment exhibited a higher percentage of saccadic tracking and a lower smooth pursuit gain compared to the normal subjects. one patient with a unilateral lesion exhibited significant asymmetry in the smooth-pursuit component. In this case, the direction of the asymmetry indicated the side of the lesion. Eye movements, Smooth pursuit tracking, Ocular tracking saccades.

Author(s):
Engelken, Edward J. ; Stevens, Kennith W. ; Bell, Ann F.
Author Organization(s):
ARMSTRONG LAB BROOKS AFB TX
Descriptive Note:
Final rept. 1 Oct 1992-30 Sep 1993
Supplementary Note:
Availability: Pub. in Aviation, Space and Environmental Medicine, v65 n5 Suppl., pA62-A65, May 1994. Available to DTIC users only. No copies furnished by NTIS.
Annotation:
Reprint: The Application of Smooth Pursuit Eye Movement Analysis to Clinical Medicine.
Pagination:
0006

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DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AL/AO-JA-1993-0052
Task Number(s):
AC
Project Number(s):
ILIR
Monitor Series:
AL/AO
 Subject Terms
Joint Capability Areas:
JCA_5.3_Planning; JCA_5_Command and Control
Communities of Interest:
Biomedical
Descriptor(s):
*CLINICAL MEDICINE, *MEDICAL SERVICES, *EYE MOVEMENTS, FREQUENCY, REPRINTS, PHASE, RESPONSE, EYE, AMPLITUDE, LESIONS, NEUROLOGY, PATIENTS, GAIN, ASYMMETRY, TRACKING, LIGHT
Field(s)/Group(s):
Anatomy and Physiology, Medicine and Medical Research
Keyword(s):
SMOOTH PURSUIT TRACKING, PE61101F, WUALILIRAC34
Report Date:
1994 May 01