Cell Types and Connectivity Patterns in Mosaic Retinas
- ISBN-10
- 3642670717
- ISBN-13
- 9783642670718
- Category
- Science
- Pages
- 84
- Language
- English
- Published
- 2012-12-06
- Publisher
- Springer Science & Business Media
- Author
- Hans-Joachim Wagner
Description
In many parts of vertebrate and invertebrate central nervous systems, groups of nerve or receptor cells can be found that are arranged and connected according to a precise, functionally defined pattern (Braitenberg, 1973; Santini, 1975; Strausfeld, 1976; Chan-Palay, 1977). In these cases, groups of cell bodies or synapses appear as basically similar configurations, which, however, are different in detail from each other. Such abstract patterns of connectivity are of a statistical nature and do not allow, in a given example, for the prediction of the localization or connections of a particular cell. "Wiring diagrams", therefore, can be obtained only from a multitude of individual observations. In contrast, in several sensory organs, concrete patterns occur that con sist of a regular, mosaic-like, and geometric arrangement of similar cell types. The constancy of such a mosaic allows predictions about certain units of the pattern on the basis of only a few exemplary observations. Typical examples are found in the visual system: In the compound eye of insects, each ommatidium contains a definite number of visual cells that are grouped around the optical axis in a hexogonal array (Kirsch feld, 1967); in the vertebrate retina, mosaics of geometrically arranged cones are found most frequently in lower vertebrates; they are common among teleosts. A number of studies have dealt with their phylogenetic significance and their functional role as adaptation to specific environments or modes of feeding.
Get the book
Similar books
-
Chemistry: An Introduction to General, Organic and Biological Chemistry
By Karen C. TimberlakeThis new edition introduces more problem-solving strategies and new conceptual and challenge problems. Also, each Chapter Review has been enhanced with Learning Goals to reinforce the mastery of concepts for students.
-
Chemistry: An Introduction to General, Organic, and Biological Chemistry
By Karen TimberlakeThis laboratory manual contains 42 experiments for the standard sequence of topics in general, organic, and biological chemistry.
-
Basic Chemistry
By Karen C. TimberlakeThe book guides students through basic chemistry problem solving with engaging visuals and a focus on developing the math skills necessary to be successful in the course.
-
General, Organic, and Biological Chemistry: Structures of Life, eBook, Global Edition
By Karen C. TimberlakeThe full text downloaded to your computer With eBooks you can: search for key concepts, words and phrases make highlights and notes as you study share your notes with friends eBooks are downloaded to your computer and accessible either ...
-
Basic Chemistry
By Karen C. Timberlake, William E. TimberlakeBasic Chemistry
-
Basic Chemistry, Books a la Carte Edition
By Karen C. TimberlakeBasic Chemistry, Books a la Carte Edition
-
Essential Laboratory Manual for General, Organic and Biological Chemistry
By Karen C. TimberlakeEssential Laboratory Manual for General, Organic and Biological Chemistry
-
Basic Chemistry, Global Edition
By Karen C. Timberlake, Bill TimberlakeThe main objective in writing this text is to make the study of chemistry an engaging and a positive experience for students by relating the structure and behaviour of matter to real life.
-
General, Organic, and Biological Chemistry: An Integrated Approach
By Karen C. Timberlake, Laura D. Frost, Todd S. DealThe eText pages look exactly like the printed text, and include powerful interactive and customization functions. This is the product access code card for MasteringChemistry with Pearson eText and does not include the actual bound book.
-
Chemistry: An Introduction to General, Organic, and Biological Chemistry
By Karen C. TimberlakeHealth, Environmental, and Green Chemistry Notes throughout the text relate chemistry chapters to real-life topics in health, the environment, and medicine that are interesting and motivating to students.