Photically evoked unit activity in the tectum opticum of the squirrel monkey

Visually evoked unit responses of the tectum were studied in the squirrel monkey. The results showed that the superior colliculus had a definite functional laminar organization. Units responding to diffuse light were found in the upper part of the stratum griseum superficiale, units having antagonistically segregated receptive fields in the middle portion, and units sensitive to moving objects in the lower portion as well as in the stratum opticum. Retinotopic projection was also observed. The pretectal region contained mainly “tonic‐on” and “inhibitory” units. No specific localization was observed in the distribution of these units.

[1]  S. W. Ranson,et al.  THE CENTRAL PATH OF THE LIGHT REFLEX: A STUDY OF THE EFFECT OF LESIONS , 1935 .

[2]  W. R. Ingram,et al.  A note on the topography of the pretectal area of the monkey , 1937 .

[3]  J. Apter,et al.  PROJECTION OF THE RETINA ON SUPERIOR COLLICULUS OF CATS , 1945 .

[4]  S. W. Kuffler Discharge patterns and functional organization of mammalian retina. , 1953, Journal of neurophysiology.

[5]  D. Hubel,et al.  Receptive fields of optic nerve fibres in the spider monkey , 1960, The Journal of physiology.

[6]  D. Hubel,et al.  Integrative action in the cat's lateral geniculate body , 1961, The Journal of physiology.

[7]  D. Hubel,et al.  Receptive fields, binocular interaction and functional architecture in the cat's visual cortex , 1962, The Journal of physiology.

[8]  J. Altman,et al.  An electrophysiological study of the superior colliculus and visual cortex. , 1962, Experimental Neurology.

[9]  D. Denny-Brown,et al.  The Midbrain and Motor Integration , 1962, Proceedings of the Royal Society of Medicine.

[10]  K. Akert,et al.  A stereotaxic atlas of the brain of the squirrel monkey : (Saimiri sciureus) , 1963 .

[11]  T H MEIKLE,et al.  THE ROLE OF THE SUPERIOR COLLICULUS IN VISUALLY GUIDED BEHAVIOR. , 1965, Experimental neurology.

[12]  R. Hill,et al.  Responsiveness to sensory stimulation of units in the superior colliculus and subjacent tectotegmental regions of the rabbit. , 1966, Experimental neurology.

[13]  L. Kruger,et al.  An electrophysiological study of the visual projection to the superior colliculus of the rat , 1966, The Journal of comparative neurology.

[14]  W. Levick Receptive fields and trigger features of ganglion cells in the visual streak of the rabbit's retina , 1967, The Journal of physiology.

[15]  L. Kruger,et al.  Unit analysis of the pretectal nuclear group in the rat , 1967, The Journal of comparative neurology.

[16]  J. Campos-Ortega,et al.  The subcortical distribution of optic fibers in Saimiri sciureus (Squirrel monkey) , 1967, The Journal of comparative neurology.

[17]  J. C. Urbaitis,et al.  Relearning a dark-light discrimination by cats after cortical and collicular lesions. , 1968, Experimental neurology.

[18]  A. Cavaggioni,et al.  Photic reflex and pretectal region. , 1968, Archives italiennes de biologie.

[19]  P. Marchiafava,et al.  Unit responses to visual stimuli in the superior colliculus of the unanesthetized, mid-pontine cat. , 1968, Archives italiennes de biologie.

[20]  N. Humphrey Responses to visual stimuli of units in the superior colliculus of rats and monkeys. , 1968, Experimental neurology.

[21]  K. Hoffmann,et al.  Functional aspects of localization in the cat's tectum opticum. , 1969, Brain research.

[22]  M. B. Bender,et al.  The pretectal syndrome in monkeys. I. Disturbances of gaze and body posture. , 1969, Brain : a journal of neurology.

[23]  P Sterling,et al.  Visual receptive fields in the superior colliculus of the cat. , 1969, Journal of neurophysiology.

[24]  R. Lund Synaptic patterns of the superficial layers of the superior colliculus of the rat , 1969, The Journal of comparative neurology.

[25]  D Symmes,et al.  The superior colliculus and higher visual functions in the monkey. , 1969, Brain research.

[26]  P Sterling,et al.  Influence of visual cortex on receptive fields in the superior colliculus of the cat. , 1969, Journal of neurophysiology.

[27]  K. Hoffmann,et al.  Response characteristics of movement-detecting neurons in pretectal region of the cat. , 1969, Experimental neurology.

[28]  J. Tigges,et al.  The accessory optic system and other optic fibers of the squirrel monkey. , 1969, Folia primatologica; international journal of primatology.