Summary
Single neurons were recorded from the superficial layers of the superior colliculus of immobilized monkeys (Macaca mulatta and Macaca irus). Two main functional types of neurons were found. The neurons of the first type (Type I neurons) responded well to simple stationary and moving stimuli such as spots, bars or slits of light. The latency of their response was 41 ± 6 ms. They were not directionally selective and responded to a large range of velocities.
The neurons of the second type (Type II neurons) responded very poorly to simple visual stimuli and their activation required real objects or certain two-dimensional patterns. The mean latency of response of these units was 66 ± 26 ms. Habituation was always present. Type II neurons were located in the lower part of the superficial layers.
The characteristics of Type II neurons suggest that in the primate superior colliculus there is a mechanism that allows the recognition of the complexity and the novelty of a stimulus and guides orienting responses to those stimuli that are worth analyzing in detail.
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References
Apter, J.T.: Eye movements following strychninization of the superior colliculus of cats. J.Neurophysiol. 8, 123–134 (1945).
Camarda, R., Rizzolatti, G.: Visual receptive fields in the lateral suprasylvian area (Clare-Bishop area) of the cat. Brain Res. 101, 427–443 (1976).
Cynader, M., Berman, N.: Receptive field organization of monkey superior colliculus. J. Neurophysiol. 35, 187–201 (1972).
Doty, R.W.: Editorial note. Use of curariform agents. Exp. Neurol. 47, I-IV (1975).
Goldberg, M.E., Wurtz, R.H.: Activity of superior colliculus in behaving monkey. I. Visual receptive fields of single neurons. J. Neurophysiol. 35, 542–559 (1972).
Hess, W.R., Bürgi, S., Bucher, V.: Motorische Funktion des Tektal- und Tegmental-Gebietes. Monatsschr. Psychiat. Neurol. 112, 1–52 (1946).
Hubel, D.H., Wiesel, T.N.: Receptive fields and functional architecture in two nonstriate visual areas (18 and 19) of the cat. J. Neurophysiol. 28, 229–289 (1965).
Mountcastle, V.B.: Modality and topographic properties of single neurons of cat's somatic sensory cortex. J. Neurophysiol. 20, 408–434 (1977).
Mountcastle, V.B., Talbot, W.H., Sakata, H., Hyvärinen, J.: Cortical neuronal mechanisms in flutter-vibration studied in unanesthetized monkeys. Neuronal periodicity and frequency discrimination. J. Neurophysiol. 32, 452–484 (1969).
Poggio, G.F., Mountcastle, V.B.: The functional properties of ventrobasal thalamic neurons studied in unanesthetized monkeys. J. Neurophysiol. 26, 775–806 (1963).
Rizzolatti, G., Camarda, R.: Influence of the presentation of remote visual stimuli on visual response of cat area 17 and lateral suprasylvian area. Exp. Brain Res. 29, 107–122 (1977).
Rizzolatti, G., Camarda, R., Grupp, L.A., Pisa, M.: Inhibition of visual responses of single units in the cat superior colliculus by the introduction of a second visual stimulus. Brain Res. 61, 390–394 (1973).
Rizzolatti, G., Camarda, R., Grupp, L.A., Pisa, M.: Inhibitory effect of remote visual stimuli on the visual responses of the cat superior colliculus: spatial and temporal factors. J. Neurophysiol. 37, 1262–1275 (1974).
Schiller, P.H., Koerner, F.: Discharge characteristics of single units in superior colliculus of the alert Rhesus monkey. J. Neurophysiol. 34, 920–936 (1971).
Sprague, J.M., Meikle, T.H., Jr.: The role of the superior colliculus in visually guided behavior. Exp. Neurol. 11, 115–146 (1965).
Sprague, J.M., Berlucchi, G., Rizzolatti, G.: The role of the superior colliculus and pretectum in vision and visually guided behavior. In: Handbook of sensory physiology, R. Jung (ed.), Vol. VII/3 B, pp. 27–101. Berlin, Heidelberg, New York: Springer 1973.
Updyke, B.V.: Characteristics of unit responses in superior colliculus of the Cebus monkey. J. Neurophysiol. 37, 896–910 (1974).
Wurtz, R.H., Goldberg, M.E.: Activity of superior colliculus in behaving monkey. IV. Effects of lesions on eye movements. J. Neurophysiol. 35, 587–596 (1972).
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This study was supported in part by NIH Grant 2 ROI EY00577 and in part by a grant from the Italian CNR. H.A.B. was supportet by a grant from Cassa di Risparmio di Parma
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Rizzolatti, G., Buchtel, H.A., Camarda, R. et al. Neurons with complex visual properties in the superior colliculus of the macaque monkey. Exp Brain Res 38, 37–42 (1980). https://doi.org/10.1007/BF00237928
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DOI: https://doi.org/10.1007/BF00237928