Über den Frequenzgang der horizontalen Folgebewegungen des menschlichen Auges

Drischel, H

doi:10.1007/bf02291023

Cited by 14 publications

(8 citation statements)

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“…However, the contribution of the smooth component to the total eye displacement decreased when a background was present. This decrease was very small for the diffuse background: 0 On the basis of these results we conclude that the presence of a large stationary structured background has an inhibitory influence on smooth pursuit eye movements; vertical smooth pursuit is more inhibited than horizontal smooth pursuit. The inhibition of smooth pursuit is fully compensated by the more frequent insertion of saccades in order to pursue the target with the proper amplitude.…”

Section: Triangular Wavesmentioning

confidence: 56%

“…The gain of the composite eye movement in response to single sine-wave stimuli was close to unity. [0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Hz the mean gain was 1 01 + 0-02 (S.D. ; n = 30 = 5 subjects x 3 situations x 2 dimensions).…”

Section: Data Analy8i8mentioning

confidence: 99%

“…For the one-dimensional sine-wave stimulus of [0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Surprisingly, during pursuit of a circular motion the average gain of the smooth components (both horizontal and vertical) was significantly higher than for target motion restricted to one dimension. For a circular target motion with an amplitude of 7 07°the mean increase (averaged over three frequencies) amounted to 0-06 + 0-04 (S.D.…”

Section: Data Analy8i8mentioning

confidence: 99%

“…To measure the pursuit performance with constant stimulus velocity we used triangular-wave stimuli with the same frequencies (0)(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) as the single sine-wave stimuli and in addition frequencies of 0-06, 0-09 and 0-12 Hz, all at amplitudes of 7 07 and 100. This resulted in target velocities ranging from 1-7 to 20 80/s.…”

Section: Triangular Wavesmentioning

confidence: 99%

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Human smooth and saccadic eye movements during voluntary pursuit of different target motions on different backgrounds.

Collewijn¹,

Tamminga²

1984

The Journal of Physiology

468

136

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SUMMARY1. Horizontal and vertical eye movements of ten human subjects were recorded with a scleral induction-coil technique during voluntary pursuit of sinusoidal, triangular and pseudo-random target motions of different frequency, amplitude and dimensionality upon a dark, diffuse or structured background.2. Data processing included separation of the composite eye movement into a cumulative smooth and saccadic displacement, computation of gain and phase of the composite and smooth eye movements with respect to the target movement and analysis of retinal position error.3. Pursuit eye movements were never completely smooth. Smooth pursuit gain was always lower than 0-95 and saccades were used to supplement the smooth eye movements in pursuing the target with the proper amplitude.4. The gain of composite eye movements was about unity for sinusoidal target motions and ramps; it exceeded unity for the highest frequency components in a pseudo-random motion.5. The gain of the smooth eye movements decreased monotonously whenever target velocity increased. It was higher for single sine waves than for a pseudo-random motion, however, with pseudo-random motion it was relatively higher for the higher frequency components.6. Phase lags were in general smaller for single sine waves than for pseudo-random motion, but for the latter a phase lead of the smooth component was consistently found for the lower frequency components.7. During pursuit of a rhomboid trajectory, the eye movements showed directional errors which are interpreted as anticipatory behaviour.8. The distribution of the retinal error was symmetrical around zero. Its standard deviation varied between about 0-2 and 1.30; it was about proportional to target velocity and inversely proportional to smooth pursuit gain. It was limited by the insertion of saccades which were in general corrective.9. The influence of a diffusely illuminated background was minimal. A structured background inhibited smooth pursuit in the horizontal direction by about 10 % and

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Section: Triangular Wavesmentioning

confidence: 56%

Section: Data Analy8i8mentioning

confidence: 99%

Section: Data Analy8i8mentioning

confidence: 99%

Section: Triangular Wavesmentioning

confidence: 99%

See 2 more Smart Citations

Human smooth and saccadic eye movements during voluntary pursuit of different target motions on different backgrounds.

Collewijn¹,

Tamminga²

1984

The Journal of Physiology

468

136

View full text Add to dashboard Cite

show abstract

“…After the adaptation is complete, Drischel (1958), Sunderhauf (1960) and Young (1962) demonstrated that for target frequencies between 0 3 and 1 c/s the eye may actually anticipate the target motion and lead it by a small amount (less than 1 of a cycle). The adaptation phase in response to a periodic square wave is considerably longer, requiring as much as 5 complete target cycles.…”

Section: Introductionmentioning

confidence: 99%

Periodic eye tracking in the monkey

Fuchs¹

1967

The Journal of Physiology

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1. Eye movements were measured in monkeys trained for visual tracking. 2. In response to periodic square wave target movements, monkeys do not show a significant reduction in the latency of saccadic movements. 3. Under similar conditions, human beings subconsciously reduce their latency and after several cycles are in step with the target. 4. In response to sinusoidal targets, monkeys show a latency or phase lag which increases monotonically with frequency starting at 0·3 c/s. Human beings can remain in phase with the target at frequencies up to 1·0 c/s. 5. Hence, monkeys do not exhibit the human predictive tracking response.

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