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• Superior_colliculus abstract "The optic tectum or simply tectum is a paired structure that forms a major component of the vertebrate midbrain. In mammals, this structure is more commonly called the superior colliculus (Latin, upper hill), but, even in mammals, the adjective tectal is commonly used. The tectum is a layered structure, with a number of layers that vary by species. The superficial layers are sensory-related, and receive input from the eyes as well as other sensory systems. The deep layers are motor-related, capable of activating eye movements as well as other responses. There are also intermediate layers, with multi-sensory cells and motor properties.The general function of the tectal system is to direct behavioral responses toward specific points in egocentric ("body-centered") space. Each layer of the tectum contains a topographic map of the surrounding world in retinotopic coordinates, and activation of neurons at a particular point in the map evokes a response directed toward the corresponding point in space. In primates, the tectum ("superior colliculus") has been studied mainly with respect to its role in directing eye movements. Visual input from the retina, or "command" input from the cerebral cortex, create a "bump" of activity in the tectal map, which, if strong enough, induces a saccadic eye movement. Even in primates, however, the tectum is also involved in generating spatially directed head turns, arm-reaching movements, and shifts in attention that do not involve any overt movements. In other species, the tectum is involved in a wide range of responses, including whole-body turns in walking rats, swimming fishes, or flying birds; tongue-strikes toward prey in frogs; fang-strikes in snakes; etc.In some non-mammal species, including fish and birds, the tectum is one of the largest components of the brain. In mammals, and especially primates, the massive expansion of the cerebral cortex reduces the tectum ("superior colliculus") to a much smaller fraction of the whole brain. Even there, however, it remains very important in terms of function as the primary integrating center for eye movements.Note on terminology: the use by the literature of different terms for mammals and non-mammals, for what is really the same structure, creates problems for an article that attempts to encompass the full range of vertebrate species. There does not seem to be any way to handle this without causing either confusion or annoyance to some readers. The approach taken in this article is to follow the literature by using the term "superior colliculus" when discussing mammals, and "optic tectum" when discussing either specific non-mammalian species or vertebrates in general.".
• Superior_colliculus brainInfoNumber "456".
• Superior_colliculus brainInfoType "hier".
• Superior_colliculus grayPage "806".
• Superior_colliculus graySubject "188".
• Superior_colliculus isPartOfAnatomicalStructure Midbrain_tectum.
• Superior_colliculus meshName "Superior+Colliculus".
• Superior_colliculus meshNumber "A08.186.211.132.659.237.816".
• Superior_colliculus thumbnail Cn3nucleus.png?width=300.
• Superior_colliculus wikiPageExternalLink 57_Munoz_Science_1991_251.pdf.
• Superior_colliculus wikiPageExternalLink 743.
• Superior_colliculus wikiPageExternalLink 1006.
• Superior_colliculus wikiPageExternalLink 2778.
• Superior_colliculus wikiPageExternalLink 2839.
• Superior_colliculus wikiPageExternalLink 3093.
• Superior_colliculus wikiPageExternalLink 1720.
• Superior_colliculus wikiPageExternalLink info:doi%2F10.1371%2Fjournal.pone.0003582.
• Superior_colliculus wikiPageExternalLink KlierWangCraw_NN_01.pdf.
• Superior_colliculus wikiPageID "1085350".
• Superior_colliculus wikiPageRevisionID "606004486".
• Superior_colliculus braininfonumber "456".
• Superior_colliculus braininfotype "hier".
• Superior_colliculus caption "Scheme showing central connections of the optic nerves and optic tracts.".
• Superior_colliculus caption "Section through superior colliculus showing path of oculomotor nerve".
• Superior_colliculus date "April 2014".
• Superior_colliculus graypage "806".
• Superior_colliculus graysubject "188".
• Superior_colliculus hasPhotoCollection Superior_colliculus.
• Superior_colliculus image "Gray722.png".
• Superior_colliculus ispartof Midbrain_tectum.
• Superior_colliculus latin "Colliculus superior".
• Superior_colliculus meshname "Superior+Colliculus".
• Superior_colliculus meshnumber "A08.186.211.132.659.237.816".
• Superior_colliculus name "Superior colliculus".
• Superior_colliculus neurolex "Superior colliculus".
• Superior_colliculus neurolexid "birnlex_1040".
• Superior_colliculus reason Wikipedia:MOS.
• Superior_colliculus wordnet_type synset-brain-noun-1.
• Superior_colliculus subject Category:Brainstem.
• Superior_colliculus subject Category:Neuroanatomy.
• Superior_colliculus type AnatomicalStructure.
• Superior_colliculus type Brain.
• Superior_colliculus type AnimalBodyPart.
• Superior_colliculus type Brain.
• Superior_colliculus type BiologicalObject.
• Superior_colliculus comment "The optic tectum or simply tectum is a paired structure that forms a major component of the vertebrate midbrain. In mammals, this structure is more commonly called the superior colliculus (Latin, upper hill), but, even in mammals, the adjective tectal is commonly used. The tectum is a layered structure, with a number of layers that vary by species. The superficial layers are sensory-related, and receive input from the eyes as well as other sensory systems.".
• Superior_colliculus label "Colliculi superiores".
• Superior_colliculus label "Colliculus".
• Superior_colliculus label "Colículo superior".
• Superior_colliculus label "Colículo superior".
• Superior_colliculus label "Superior colliculus".
• Superior_colliculus label "Верхнее двухолмие".
• Superior_colliculus label "上丘".
• Superior_colliculus sameAs Colliculi_superiores.
• Superior_colliculus sameAs Άνω_διδύμιο.
• Superior_colliculus sameAs Colículo_superior.
• Superior_colliculus sameAs Colliculus.
• Superior_colliculus sameAs 上丘.
• Superior_colliculus sameAs Colículo_superior.
• Superior_colliculus sameAs m.044pwt.
• Superior_colliculus sameAs Q1109417.
• Superior_colliculus sameAs Q1109417.
• Superior_colliculus wasDerivedFrom Superior_colliculus?oldid=606004486.
• Superior_colliculus depiction Cn3nucleus.png.
• Superior_colliculus isPrimaryTopicOf Superior_colliculus.
• Superior_colliculus name "Colliculus superior".
• Superior_colliculus name "Superior colliculus".