Results 11 to 20 of about 1,792,234 (236)

Increase by visual stimuli in turnover of 5‐hydroxytryptamine in the superior colliculi of the rabbit.

open access: greenThe Journal of Physiology, 1976
1. Irregular light falshes were played on to one eye of dark adapted rabbits for periods of 20‐80 min. The concentration of 5‐hydroxyindol‐3‐ylacetic acid (5‐HIAA) and of 5‐hydroxytryptamine (5‐HT) were estimated in left and right superior colliculi, thalami and hippocampi. 2.
M Vogt, K Fukui
semanticscholar   +6 more sources

Effects of damage to superior colliculi and pre-tectum on movement discrimination in rhesus monkeys [PDF]

open access: greenExperimental Brain Research, 1984
Eight rhesus monkeys (Macaca mulatta) were trained to detect an instantaneous lateral displacement of a small spot of light. The smallest movement for 79% correct performance was then determined. Severing the splenium of the corpus callosum, which has to be done to reveal the superior colliculi, had no effect on the movement threshold.
Cowey, A., Smith, B., Butter, Charles M.
semanticscholar   +5 more sources

The involvement of the superior colliculi in hemispherectomized subjects with blindsight

open access: goldJournal of Vision, 2010
Purpose: The ability in cortically blind patients to respond to visual stimuli without consciously experiencing has been termed ‘blindsight’. The goal of this study is to investigate the involvement of the superior colliculi (SC) in mediating blindsight in hemispherectomized (HS) subjects. Methods: We used the achromatic properties of collicular cells,
Sandra E. Leh   +2 more
semanticscholar   +4 more sources

[18F]-Fdg Pet Identified Superior Colliculi Hypometabolism in Progressive Supranuclear Palsy

open access: hybridJournal of Alzheimer’s Disease & Parkinsonism, 2016
Hypometabolism in the fronto-mesial cortex and in the anterior cingulate cortex were reported in patients with progressive supranuclear palsy (PSP). Severe neuronal loss, associated with gliosis and neurofibrillary tangles were reported in the superior colliculi of patients with PSP in the initial clinico-neuropathological description of the disease by
Alice Jaillard   +4 more
semanticscholar   +4 more sources

Origin and terminal distribution of the trigeminal projections to the inferior and superior colliculi in the lesser hedgehog tenrec [PDF]

open access: bronzeEuropean Journal of Neuroscience, 1998
AbstractThe trigemino‐tectal projections were investigated with anterograde and retrograde tracing techniques in the Madagascan lesser hedgehog tenrec, Echinops telfairi. There were prominent contralateral projections to the inferior colliculus (CoI) and the superior colliculus (CoS), each showing its own characteristic pattern of terminations.
H. Künzle
semanticscholar   +5 more sources

Functional MRI of postnatal visual development in normal and hypoxic–ischemic-injured superior colliculi

open access: closedNeuroImage, 2010
The superior colliculus (SC) is a laminated subcortical structure in the mammalian midbrain, whose superficial layers receive visual information from the retina and the visual cortex. To date, its functional organization and development in the visual system remain largely unknown.
Zhou, IY   +4 more
semanticscholar   +7 more sources

Midbrain (level of superior colliculi)

open access: hybridRadiopaedia.org, 2015
Jeremy A. Jones, Gray's Illustrations
semanticscholar   +3 more sources

Inflammatory response of both retinas and superior colliculi to unilateral optic nerve axotomy

open access: bronzeActa ophthalmologica
Objective: Unilateral optic nerve crush (ONC) induces a bilateral inflammatory reaction affecting both injured and contralateral un‐injured retinas. However, few works have investigated the spread of inflammation along visual pathway.
C. Galindo-Romero   +8 more
semanticscholar   +2 more sources

Deficits in the activation of human oculomotor nuclei in chronic traumatic brain injury [PDF]

open access: yesFrontiers in Neurology, 2015
Binocular eye movements form a finely-tuned system that requires accurate coordination of the oculomotor dynamics of the brainstem control nuclei when tracking the fine binocular disparities required for 3D vision.
Christopher W Tyler   +3 more
doaj   +3 more sources

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