Document Detail

Consequences for retinal growth when vision occurs in S2 space.
MedLine Citation:
PMID:  2224067     Owner:  NLM     Status:  MEDLINE    
We postulate that the process of vision occurs in the S2 space. The retina is endowed with the topology of a part of a two-sphere S2, roughly, the topology of a hemisphere. There is a corresponding topology on the tectal surface, induced by the anatomy of the retino-tectal connections. Our analysis predicts the experimentally observed "near-neighbour" relationships between points in the visual field and their representation in the tectum. Further, in this context, topological arguments are presented to indicate that if the normal developing retinal disc in goldfish undergoes a process of deformation, a discontinuity is generated at the retinal surface. This discontinuity makes the differential patterns of the retinal and tectal tissues more compatible, and also enables the retina (which grows throughout the life of the animal) to conveniently connect to the tectum.
G Thor; N Nitsure; H Hastings
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Bio Systems     Volume:  24     ISSN:  0303-2647     ISO Abbreviation:  BioSystems     Publication Date:  1990  
Date Detail:
Created Date:  1990-12-07     Completed Date:  1990-12-07     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0430773     Medline TA:  Biosystems     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  25-30     Citation Subset:  IM    
Tata Institute of Fundamental Research, Bombay, India.
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MeSH Terms
Models, Biological
Retina / anatomy & histology,  growth & development,  physiology*
Superior Colliculi / anatomy & histology,  physiology
Vision, Ocular / physiology*
Visual Pathways / anatomy & histology,  physiology

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