Summary
In unrestrained animals of many species, electrical stimulation at sites in the superior colliculus evokes motions of the head and eyes. Collicular stimulation in monkeys whose heads are rigidly fixed is known to elicit a saccade whose characteristics depend on the site stimulated and are largely independent of electrical stimulation parameters and initial eye position.
This study examined what role the colliculus plays in the coding of head movements. A secondary aim was to demonstrate the effects of such electrical stimulation parameters as pulse frequency and intensity. Rhesus monkeys were free to move their heads in the horizontal plane; head and eye movements were monitored. As in previous studies, eye movements evoked by collicular stimulation were of short latency, repeatable, had a definite electrical threshold, and did not depend on the initial position of the eye in the orbit. By contrast, evoked head movements were extremely variable in size and latency, had no definite electrical threshold, and did depend on initial eye position. Thus when the eyes approached positions of extreme deviation, a head movement in the same direction became more likely. These results suggest that the superior colliculus does not directly code head movements in the monkey.
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References
Akert, K.: Der visuelle Greifreflex. Helv. Physiol. Acta 7, 112–134 (1949)
Altman, J., Carpenter, M.B.: Fiber projections of the superior colliculus in the cat. J. comp. Neurol. 116, 157–178 (1961)
Anderson, M.E., Yoshida, M., Wilson, V.J.: Influence of superior colliculus on cat neck motoneurons. J. Neurophysiol. 34, 898–907 (1971)
Apter, J.T.: Eye movements following strychninization of the superior colliculus of cats. J. Neurophysiol. 9, 73–86 (1946)
Bizzi, E., Schiller, P.H.: Single unit activity in the frontal eye fields of unanesthetized monkeys during eye and head movement. Exp. Brain Res. 10, 151–158 (1970)
Bizzi, E., Kalil, R., Morasso, P., Tagliasco, V.: Central programming and peripheral feedback during eye-head coordination in monkeys. In: Cerebral Control of Eye Movement and Motion Perception. (J. Dichgans, E. Bizzi, Eds.). Basel: Karger Press 1972
Bizzi, E., Kalil, R., Tagliasco, V.: Eye-head co-ordination in monkeys: evidence for centrally patterned organization. Science 173, 452–454 (1971)
Cynader, M., Berman, N.: Receptive-field organization of monkey superior colliculus. J. Neurophysiol. 35, 187–201 (1972)
Harting, J.K., Hall, W.C., Diamond, I.T., Martin, G.F.: Antercgrade degeneration study of the superior colliculus in Tupaia glis: evidence for a subdivision between superficial and deep layers. J. comp. Neurol. 148, 361–386 (1973)
Hess, W.R., Bürgi, S., Bucher, V.: Motorische Funktion des Tectal- und Tegmentalgebietes. Mschr. Psychiat. Neurol. 112, 1–52 (1946)
Morasso, P., Bizzi, E., Dichgans, J.: Adjustment of saccade characteristics during head movements. Exp. Brain Res. 16, 492–500 (1973)
Myers, R.E.: Projections of superior colliculus in monkey. Anat. Rec. 145, 264 (1963)
Nyberg-Hansen, R.: The location and termination of tectospinal fibers in the cat. Exp. Neurol. 9, 212–227 (1964)
Robinson, D.A.: Eye movements evoked by collicular stimulation in the alert monkey. Vision Res. 12, 1795–1808 (1972)
Robinson, D.L., Jarvis, C.D.: Superior colliculus neurons studied during head and eye movements of the behaving monkey. J. Neurophysiol. 37, 533–540 (1974)
Schaeffer, K.-P.: Neuronal elements of the orienting response. In: Cerebral Control of Eye Movement and Motion Perception. (J. Dichgans, E. Bizzi, Eds.). Basel: Karger Press 1972
Schiller, P.H., Koerner, F.: Discharge characteristics of single units in superior colliculus of the alert rhesus monkey. J. Neurophysiol. 35, 920–936 (1971)
Schiller, P.H., Stryker, M.P.: Single-unit recording and stimulation in superior colliculus of the alert rhesus monkey. J. Neurophysiol. 35, 915–924 (1972)
Steinbach, M.J., Money, K.E.: Eye movements of the owl. Vision Res. 13, 889–891 (1973)
Straschill, M., Rieger, P.: Optomotor integration in the colliculus of the cat. In: Cerebral Control of Eye Movement and Motion Perception. (J. Dichgans, E. Bizzi, Eds.). Basel: Karger Press 1972
Stryker, M.P., Blakemore, C.: Saccadic and disjunctive eye movements in cats. Vision Res. 12, 2005–2013 (1972)
Wurtz, R.H., Goldberg, M.E.: Activity of superior colliculus in behaving monkey. III. Cells discharging before eye movements. J. Neurophysiol. 35, 575–586 (1972)
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Stryker, M.P., Schiller, P.H. Eye and head movements evoked by electrical stimulation of monkey superior colliculus. Exp Brain Res 23, 103–112 (1975). https://doi.org/10.1007/BF00238733
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DOI: https://doi.org/10.1007/BF00238733