[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 54.211.41.181. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
July 1977

Oblique Saccadic Eye MovementsIndependence of Horizontal and Vertical Channels

Author Affiliations

From the Departments of Electrical Engineering and Physiological Optics, University of California, Berkeley (Dr Stark), and the Biomedical Engineering Program, Carnegie-Mellon University, Pittsburgh (Dr Bahill).

Arch Ophthalmol. 1977;95(7):1258-1261. doi:10.1001/archopht.1977.04450070156016
Abstract

• Horizontal and vertical components of oblique saccadic eye movements are dynamically independent. That Is, they have independent dynamic trajectories determined by either the presence, or the absence, as well as the magnitudes of dynamic overshoot, glissades, overlapping saccades, and closely spaced saccades. Temporally, oblique movements manifest varying degrees of independence, for the two components can begin and end either together or separately. Purely horizontal saccades (ie, between two points on a horizontal line) usually show crosstalk demonstrated by extraneous, transient, vertical components. Therefore, saccades are very seldom linear or straight; the trajectories are usually curved.

(Arch Ophthalmol 95:1258-1261, 1977)

References
1.
Christoff N:  A clinic pathologic study of vertical eye movements . Arch Neurol 31:1-8, 1974.Article
2.
Stark L:  The control system for versional eye movements , in Bach-y-Rita P, Collins CC, Hyde J (eds): The Control of Eye Movements . New York, Academic Press Inc, 1971, pp 382-385.
3.
Walsh FB, Hoyt WF: Clinical Neuro-ophthalmology , ed 3. Baltimore, Williams & Wilkins Co, 1969.
4.
Von Helmholtz H: Helmholtz's Treatise on Physiological Optics , Southall JPC (ed). New York, Dover Publications Inc, 1962, vol 3, p 153.
5.
Yarbus A: Eye Movements and Vision . New York, Plenum Press, 1967, p 141.
6.
Palmieri G, Oliva GA, Scotto M: C.R.T.:  Spot-follower device for eye movement measurements . Kybernetik 8:23-30, 1971.Article
7.
Bahill AT, Stark L:  Neurological control of horizontal and vertical components of oblique saccadic eye movements . Math Biosci 27:287-298, 1975.Article
8.
Bahill AT, Clark MR, Stark L:  Computer simulation of overshoot in saccadic eye movements . Comput Programs Biomed 4:230-237, 1975.Article
9.
Bahill AT, Clark MR, Stark L:  Dynamic overshoot in saccadic eye movements is caused by neurological control signal reversals . Exp Neurol 48:95-122, 1975.Article
10.
Bahill AT, Adler D, Stark L:  Most naturally occurring human saccades have magnitudes of 15 degrees or less . Invest Ophthalmol 14:468-469, 1975.
11.
Cornsweet TN, Crane HD:  Accurate two-dimensional eye tracker using first and fourth Purkinje images . J Opt Soc Am 63:921-928, 1973.Article
12.
Traini LF, O'Leary DP, Bahill AT, et al: Noncontacting, horizontal and vertical eye movement monitor. Read before the sixth annual meeting of the Society for Neuroscience, Toronto, November 1976.
13.
Weber RB, Daroff RB:  Corrective movements following refixation saccades: Type and control system analysis . Vision Res 12:467-475, 1972.Article
14.
Bahill AT, Bahill KA, Clark MR, et al:  Closely spaced saccades . Invest Ophthalmol 14:317-321, 1975.
15.
Henn V, Cohen B:  Quantitative analysis of activity in eye muscle motoneurons during saccadic eye movements and positions of fixation . J Neurophysiol 36:115-126, 1973.
16.
Dodge R:  The laws of relative fatigue . Psychol Rev 24:89-113, 1917.Article
17.
Tamler E, Marg E, Jampolsky A, et al:  Electromyography of human saccadic eye movements . Arch Ophthalmol 62:657-661, 1959.Article
18.
Eckmiller R, Blair SM, Westheimer G:  Oculomotor neuronal correlations shown by simultaneous unit recordings in alert monkey . Exp Brain Res 21:241-250, 1974.Article
19.
Bahill AT, Ciuffreda KH, Kenyon RV, et al:  Dynamic and static violations of Hering's law of equal innervation . Am J Optometry and Physiological Optics 53:786-796, 1976.Article
20.
Robinson DA, Fuchs AF:  Eye movements evoked by stimulation of frontal eye fields . J Neurophysiol 32:637-648, 1969.
21.
Schiller PH, Stryker M:  Single-unit recording and stimulation in superior colliculus of the alert rhesus monkey . J Neurophysiol 35:915-924, 1972.
×