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optic tectum |
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optic tectum [′äp·tik ′tek·təm] (vertebrate zoology) The roof of the mesencephalon constituting a major visual center and association area of the brain of premature vertebrates. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Following third brain ventricle injection of cytomegalovirus (CMV)-green fluorescent protein or CMV-LUC gene constructs, we established that cells in the telencephalon and optic tectum are transfected. The long, tail-like axons of nerve cells in the eye's retina plug into the correct sockets in developing animal's optic tectum -- the brain region that coordinates visual stimuli -- by seeking out the lowest concentration of a chemical named "repulsive guiding molecule" (RGM), asserts Friedrich Bonhoeffer of the Max Planck Institute for Developmental Biology in Tubingen, Germany. |
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