Results 171 to 180 of about 1,792,234 (236)

Organization and origin of the connection from the inferior to the superior colliculi in the rat

Journal of Comparative Neurology, 2006
AbstractThe inferior colliculus (IC) is the main ascending auditory relay station prior to the superior colliculus (SC). The morphology and origin of the connection from inferior to superior colliculus (I‐SC) was analyzed both by anterograde and retrograde tracing.
Gontzal García del Caño, Luis Martínez-Millán, Amaya Alonso-Cabria, Inmaculada Gerrikagoitia   +3 more
semanticscholar   +4 more sources

Differential color responses from the superior colliculi of squirrel monkeys

Vision Research, 1966
Abstract Color sensitivity of the superior colliculi was investigated in squirrel monkeys. Evoked potentials were recorded from the colliculi in response to red and blue light stimulation. Color sensitivity of the superior colliculus was indicated by: differences in latency of potentials evoked by different color stimuli, differences in amplitude of ...
L.C. Massopust, Lee R. Wolin, Judith Meder   +2 more
semanticscholar   +5 more sources

Tectotectal interactions through the commissure of the superior colliculi: An electrophysiological study

Experimental Neurology, 1981
Abstract The interaction between both superior colliculi through the collicular commissure was studied in cats. Stimulation of the optic tract and superior colliculus elicited a positive potential on the contralateral superior colliculus, recorded between 1.5- and 4.5- or 5.0-mm depth.
MASCETTI, GG, ARRIAGADA, JR
semanticscholar   +5 more sources

Superior colliculi and their fiber connections in the rat

Journal of Comparative Neurology, 1930
James W. Papez, G. LaVerne Freeman
semanticscholar   +4 more sources

Discrimination learning of grating orientation in visually deprived cats and the role of the superior colliculi.

Behavioral Neuroscience, 1996
Four cats deprived binocularly of pattern vision (BD cats), 4 control cats reared also in the laboratory (C cats), and 4 normal wild cats (N cats) were trained to discriminate gratings of progressively smaller difference in orientation. Differences in learning were found only in fine orientation discriminations.
Zernicki B, Teresa Zabłocka
semanticscholar   +5 more sources

Convergence of Y and non-Y channels onto single neurons in the superior colliculi of the cat

Neuroreport, 2001
Receptive field properties of single neurons in the cat superior colliculus were examined following selective conduction-block of Y-type fibers in contralateral optic nerve. Although the responses evoked by photic stimuli presented via the Y-blocked eye were significantly weaker than those evoked by stimuli presented via the normal eye, > 85% of ...
Chun Wang, György Benedek, Bogdan Dreher, W. Burke, Wioletta J. Waleszczyk, Wioletta J. Waleszczyk   +5 more
semanticscholar   +4 more sources

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Contribution of the superior colliculi to post-stroke unilateral spatial neglect and recovery

Neuropsychologia, 2010
Unilateral spatial neglect (USN) is a highly prevalent and disabling consequence of stroke that often responds poorly to existing interventions. Its underlying neural mechanisms are still unclear. Recent work suggests that post-stroke USN may be partly related to a disruption of top-down and bottom-up control of visual attention mediated in part ...
Alain Ptito, Alain Ptito, Nicol Korner-Bitensky, Tatiana Ogourtsova   +3 more
openaire   +4 more sources

Superior Colliculi Involvement in Poststroke Unilateral Spatial Neglect: A Pilot Study

Topics in Stroke Rehabilitation, 2011
The neural mechanisms underlying unilateral spatial neglect (USN) are unclear. The superior colliculi (SC) may be involved in USN expression, and the spatial summation effect (SSE), where reaction times to bilateral stimuli are faster than to unilateral, may be a behavioral index of SC function.
Tatiana Ogourtsova, Sandra E. Leh, Alain Ptito, Nicol Korner-Bitensky, Gail Eskes   +4 more
openaire   +4 more sources

Scrapie inoculation of mice: light and electron microscopy of the superior colliculi

Acta Neuropathologica, 1991
Ultrastructural examination of the superior colliculi of mice intraocularly inoculated with the ME7 strain of scrapie showed vacuolation early in the course of infection. Brains were examined between 85-260 days after monocular inoculation with scrapie. The mean incubation period for the development of clinical disease was 302 days.
J. R. Scott, H. Fraser, M. Jeffrey
openaire   +4 more sources

Inferior and Superior Colliculi

1992
In the classical neuroanatomical literature, the inferior and superior colliculi, located on the roof of the midbrain, are grouped together as the corpora quadrigemina. However, modern research indicates that these structures have quite different functions.
Michael F. Huerta, Douglas L. Oliver
openaire   +3 more sources