Cell Types and Connectivity Patterns in Mosaic Retinas - download pdf or read online

By Priv.-Doz. Dr. rer. nat. Dipl.-Biol. H.-J. Wagner (auth.)

ISBN-10: 3540090134

ISBN-13: 9783540090137

ISBN-10: 3642670717

ISBN-13: 9783642670718

In many elements of vertebrate and invertebrate principal worried platforms, teams of nerve or receptor cells are available which are prepared and attached in response to an exact, functionally outlined trend (Braitenberg, 1973; Santini, 1975; Strausfeld, 1976; Chan-Palay, 1977). In those circumstances, teams of cellphone our bodies or synapses look as essentially comparable configurations, which, in spite of the fact that, are assorted intimately from one another. Such summary styles of connectivity are of a statistical nature and don't permit, in a given instance, for the prediction of the localization or connections of a selected phone. "Wiring diagrams", for this reason, will be acquired merely from a large number of person observations. by contrast, in different sensory organs, concrete styles happen that con­ sist of a standard, mosaic-like, and geometric association of comparable telephone varieties. The fidelity of this kind of mosaic permits predictions approximately yes devices of the development at the foundation of just a couple of exemplary observations. regular examples are present in the visible process: within the compound eye of bugs, every one ommatidium encompasses a certain variety of visible cells which are grouped round the optical axis in a hexogonal array (Kirsch­ feld, 1967); within the vertebrate retina, mosaics of geometrically prepared cones are chanced on most often in reduce vertebrates; they're universal between teleosts. a couple of stories have handled their phylogenetic importance and their useful position as version to precise environments or modes of feeding.

Show description

Read Online or Download Cell Types and Connectivity Patterns in Mosaic Retinas PDF

Similar two hours or more books

Postnatal Development of the Cat’s Retina - download pdf or read online

References . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. fifty nine topic Index . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. sixty five 6 creation The retina as an organ of notion of sunshine, color, form and flow has been the topic of diverse and extensive mild- and electron-microscopical investigations.

Download e-book for iPad: Homemade Health - Home Remedies Your Grandmother Knew - by Anke Bialas

Home made well-being is a suite of domestic treatments directly from a time, now not goodbye in the past, whilst humans went to their backyard or kitchen pantry earlier than going to a physician. a few attempted and actual, a few quirky, yet all in response to average treatments your grandmother knew and probably used usually. therapeutic houses of universal culinary herbs forty three universal illnesses a hundred and sixty+ treatments with recipes universal & botanical names Harvesting & retaining Making natural treatments at domestic

New PDF release: The Communist Manifesto in Plain and Simple English (A

Communism is evil, correct? no longer precisely. the tips at the back of communism have been progressive and prior to it is time--but analyzing previous and drained translations of the manifesto make it challenging to make clear its rules. allow BookCaps aid with this clean and sleek translation of 1 of the main banned files ever written!

Download PDF by Edward James: Lois McMaster Bujold

Readers have offered Lois McMaster Bujold 4 Hugo Awards for most sensible Novel, a bunch matched purely through Robert Heinlein. Her Vorkosigan sequence redefined house opera with its emotional intensity and explorations of subject matters comparable to bias opposed to the disabled, financial exploitation, and the position of girls in society.

Additional info for Cell Types and Connectivity Patterns in Mosaic Retinas

Example text

It is surrounded by an area of light cytoplasm that contains occasional filaments (j). Accumulations of synaptic vesicles (sv) are observed adjacent to this region. At the vitread edge of the synaptic ridge, there are aggregations of synaptic vesicles that, in this area, fuse with the plasmalemma of the cone pedicle. The arciform density (ad) appears as an electron-dense rod in tangential sections. From the arciform density, fine, filamentous material extends to the plasma membrane of the synaptic ridge (arrows).

The external retinal layers of Nannacara anomala in semithin sections. In the transverse section (center), areas corresponding to the levels of the tangential sections 1 Oa-l Oh are indicated in brackets. In the upper right, tangential sections through the region of the visual cells are given; on the left and below, there are tangential sections through the areas of the external plexiform (EPL) and internal nuclear layers (lNL). a. Layer of rod outer segments and pigment epithelium. No regular arrangement of cells can be detected.

The pedicles of the central single cones, serving as landmarks for the visualization of the double cone mosaic, have been outlined in black; each single cone pedicle (scp) is surrounded by eight double cone pedicles (dcp). The rod spherules (rs) are distinguished from cone pedicles by a markedly less electron-dense cytoplasm. They are situated most often in the vicinity of the central single cone. Block-staining, Golgi EM impregnation, double staining of the section 39 Fig. 12. Tangential section through the external plexiform layer of Nannacara anomala.

Download PDF sample

Cell Types and Connectivity Patterns in Mosaic Retinas by Priv.-Doz. Dr. rer. nat. Dipl.-Biol. H.-J. Wagner (auth.)


by Brian
4.5

Rated 4.73 of 5 – based on 43 votes