Necessity for Afferent Activity to Maintain Eye-Specific Segregation in Ferret Lateral Geniculate Nucleus

In the adult mammal, retinal ganglion cell axon arbors are restricted to eye-specific layers in the lateral geniculate nucleus. Blocking neuronal activity early in development prevents this segregation from occurring. To test whether activity is also required to maintain eye-specific segregation, ga...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2000-03, Vol.287 (5462), p.2479-2482
1. Verfasser: Chapman, Barbara
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description In the adult mammal, retinal ganglion cell axon arbors are restricted to eye-specific layers in the lateral geniculate nucleus. Blocking neuronal activity early in development prevents this segregation from occurring. To test whether activity is also required to maintain eye-specific segregation, ganglion cell activity was blocked after segregation was established. This caused desegregation, so that both eyes' axons became concentrated in lamina A, normally occupied only by contralateral afferents. These results show that an activity-dependent process is necessary for maintaining eye-specific segregation and suggest that activity-independent cues may favor lamina A as the target for arborization of afferents from both eyes.
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source MEDLINE; Science Magazine; JSTOR Archive Collection A-Z Listing
subjects Aminobutyrates - pharmacology
Animals
Axons
Axons - physiology
Axons - ultrastructure
Biological and medical sciences
Cell separation
Competition
Competitive advantage
Desegregation
Excitatory Amino Acid Agonists - pharmacology
Eye and associated structures. Visual pathways and centers. Vision
Ferrets
Ferrets - growth & development
Ferrets - physiology
Fundamental and applied biological sciences. Psychology
Ganglia
Geniculate Bodies - anatomy & histology
Geniculate Bodies - drug effects
Geniculate Bodies - growth & development
Geniculate Bodies - physiology
Injections
Mammals
Neurology
Neuroscience
Photographic slides
Retina
Retina - drug effects
Retina - growth & development
Retinal Ganglion Cells - cytology
Retinal Ganglion Cells - drug effects
Retinal Ganglion Cells - physiology
RNA
Thalamus
Transgenes
Vertebrates: nervous system and sense organs
Visual Pathways - growth & development
Visual Pathways - physiology
title Necessity for Afferent Activity to Maintain Eye-Specific Segregation in Ferret Lateral Geniculate Nucleus
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