Eye-Head Coordination during Optokinetic Stimulation in Squirrel Monkeys

Abstract

Head and eye movements in the yaw plane were recorded during and after optokinetic stimulation in squirrel monkeys. 1) Phasic or tonic head deviations to the side of the ocular quick phase occurred in 94% of total recordings (n = 50) during the perstimulus period, and in 75% of recordings (n = 49) during the poststimulus period. Magnitude of mean head deviation was significantly different between perstimulus and poststimulus periods. 2) Head nystagmus associated with eye nystagmus was consistently observed in seven of nine squirrel monkeys during optokinetic stimulation. Squirrel monkeys are thereby less prone to display head nystagmus than either guinea pigs, pigeons or chickens. 3) Slow phase speeds of coupled head and eye nystagmus were subjected to statistical analysis. A highly significant negative correlation was found between slow phase head and eye speeds. The correlation coefficient was −0.81 at 60°/sec stimulus (n = 119) and −0.72 at 100°/sec stimulus (n = 131). The gaze speed, calculated by summing the head and eye speeds, was 59.1 ± 6.8/sec at 60°/sec and 92.2 ± 11.4 at 100°/sec stimulus. There was no significant difference between the gaze speed in a free head condition and the eye speed when the head was fixed.

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References

Bartz

AEL

. Eye and head movements in peripheral vision: nature of compensatory eye movements. Science 1966; 152: 1644–5.

Bizzi

Kalil

Tagliasco

. Eye-head coordination in monkeys: evidence for centrally patterned organization. Science 1971; 173: 452–4.

Kasai

Zee

. Eye-head coordination in labyrinthine defective human beings. Brain Res 1978; 144: 123–41.

Lanman

Bizzi

Allum

. The coordination of eye and head movement during smooth pursuit. Brain Res 1978; 153: 39–53.

Dunlop

Mowrer

. Head movements and eye functions of birds. J Comp Psychol 1930; 11: 99–112.

Huizinga

van der Meulen

. Vestibular rotatory and optokinetic reactions in the pigeon. Ann Otol Rhinol Laryngol 1951; 60: 927–47.

Gresty

. Eye, head and body movements of the guinea pig in response to optokinetic stimulation and sinusoidal oscillation in yaw. Pfluegers Arch 1975; 353: 201–14.

Takahashi

Igarashi

. Comparison of vertical and horizontal optokinetic nystagmus in the squirrel monkey. ORL 1977; 39: 321–9.

Fukuda

. Stato-kinetic reflexes in equilibrium and movement. In Japanese. Tokyo: Igaku Shoin, 1957: 92–6.

10.

Outerbridge

Jones

G Melvill

. Reflex vestibular control of head movement in man. Aerosp Med 1971; 42: 935–40.

11.

Bizzi

Kalil

Morasso

. Two modes of active eye-head coordination in monkeys. Brain Res 1972; 40: 45–8.

12.

Thoden

Wirbitzky

. Influence of passive neck movements on eye position and brain stem neurones. Pfluegers Arch 1976; 362;R37.

13.

Barlow

Freeman

. The cervico-ocular reflex in normal human adults. Neurosci Abstract 1978; 291.

14.

Morasso

Bizzi

Dichgans

. Adjustment of saccade characteristics during head movements. Exp Brain Res 1973; 16: 492–500.

15.

Dichgans

Bizzi

Morasso

. Mechanisms underlying recovery of eye-head coordination following bilateral labyrinthectomy in monkeys. Exp Brain Res 1973; 18: 548–62.

16.

Robinson

. Adaptive gain control of vestibuloocular reflex by the cerebellum. J Neurophysiol 1976; 39: 954–69.

17.

Kubo

Igarashi

Jensen

. Eye-head coordination and lateral canal block in squirrel monkeys. Ann Otol Rhinol Laryngol (in press).