TY  - JOUR
PY  - 1978//
TI  - Cross-power spectral density analysis of pursuit tracking. Evaluation of central and peripheral pathology
JO  - Annals of otology, rhinology, and laryngology
A1  - Wolfe, J. W.
A1  - Engelken, E. J.
A1  - Olson, J. W.
A1  - Allen, J. P.
SP  - 837
EP  - 844
VL  - 87
IS  - 6 Pt 1
N2  - Twenty-one normal subjects were evaluated for pursuit tracking performance at frequencies of.2,.4,.8, 1.2 and 1.6 Hz. Measures of phase (lead or lag of target), gain (amplitude of response) and spectral purity (distortion of smooth tracking) were obtained by a cross-power spectrum analysis of the stimulus input and the eye movement output. It was determined that normal subjects could quite adequately track a target moving at.4 Hz. After establishing this parameter for normals, 43 patients with central and peripheral pathology related to the vestibulo-oculomotor system were tested at this frequency. Data revealed that not only central lesions but also peripheral labyrinthine impairment could cause a marked decrement in pursuit tracking ability. Also, marked changes in tracking were evident following both central and peripheral surgical procedures.<p /> <p>Language: en</p>
LA  - en
SN  - 0003-4894
UR  - http://dx.doi.org/
ID  - ref1
ER  -