Document Detail

Monkey photoreceptor calycal processes and interphotoreceptor matrix as observed by scanning electron microscopy.
MedLine Citation:
PMID:  1781454     Owner:  NLM     Status:  MEDLINE    
Photoreceptors and the interphotoreceptor matrix of monkey retina were observed by scanning electron microscopy. Cone photoreceptors are easily distinguished from rod photoreceptors by their wide conical inner segments. The calycal processes of 50 rods and 50 cones were counted and measured. The calycal processes of cones were distinct, short, and uniform in diameter (0.1 micron). They were arranged equidistantly and, in most cases, were not continuous with longitudinal inner segment ridges, as previously suggested. In contrast to cones, rod calycal processes were fewer in number, were about one-fourth the number of the cones, were of variable length (0.7 micron to 3.0 micron), and tapered to a fine point at their distal ends. The interphotoreceptor matrix appeared spongelike, made up of anastomosing plates and strands filling the interphotoreceptor space. Other than an increased amount of matrix around cones, no structural difference between rod- and cone-associated interphotoreceptor matrix was observed.
M W Rana; S R Taraszka
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of anatomy     Volume:  192     ISSN:  0002-9106     ISO Abbreviation:  Am. J. Anat.     Publication Date:  1991 Dec 
Date Detail:
Created Date:  1992-03-06     Completed Date:  1992-03-06     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376312     Medline TA:  Am J Anat     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  472-7     Citation Subset:  IM    
Department of Anatomy and Neurobiology, St. Louis University School of Medicine, Missouri 63104.
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MeSH Terms
Extracellular Matrix / ultrastructure
Macaca fascicularis
Macaca mulatta
Macaca nemestrina
Microscopy, Electron, Scanning
Photoreceptor Cells / ultrastructure*
Retina / cytology*,  ultrastructure

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