Get Development and Aging of the Vertebrate Visual System PDF

By D.E. Lorke

ISBN-10: 3805582285

ISBN-13: 9783805582285

Certain subject factor: Neuroembryology and getting older 2006/2007, Vol. four, No. 1-2 This precise subject factor of 'Neuroembryology and getting older' includes contributions discussing the topic in-depth. 'Neuroembryology and getting older' is a well-respected, foreign peer-reviewed magazine in Neurology. designated subject concerns are integrated within the subscription.

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Extra resources for Development and Aging of the Vertebrate Visual System

Sample text

3). Behavioral experiments in the rainbow trout confirmed a similar loss. Trout that lose UV vision with age show a parallel increase in absorption of UV light by their lens, thus protecting their retina. Similarly, the Atlantic salmon, Salmo salar, at the age of up to 120 days contains in its eye square mosaics with a full complement of cones. MSP analysis confirmed the presence of UVS cones in these young salmon, while they were absent in older fish (fig. 8). A 38 Neuroembryol Aging 2006–07;4:31–60 450 500 550 600 Wavelength (nm) 650 700 750 short-wavelength-sensitive cone mechanism was also found in juvenile goldfish, yellow perch, Perca flavescens and Lepomis macrochirus, while it disappeared in all three adult fish.

Ann NY Acad Sci 2004; 1019:521. 6 Genade T, Benedetti M, Terzibasi E, Roncaglia P, Valenzano DR, Cattaneo A, Cellerino A: Annual fishes of the genus Nothobranchius as a model system for aging research. Aging Cell 2005;4:223–233. 7 Yamamoto Y, Jeffery WR: Central role for the lens in cave fish eye degeneration. Science 2000;289:631–633. 8 Tabata M: Persistence of pineal photosensory function in blind cave fish, Astyanax mexicanus. Comp Biochem Physiol A 1982; 73: 125–127. 9 O’Brien P, Klein DC: Pineal and Retinal Relationships.

Apoptosis of UVS nucleus. Note Mueller cells engulfing pyknotic nucleus in d. Mü = Mueller cell (note glycogen granules). (From Kunz et al. ) Rods as well as all types of cones are differentiated and have attained a light-adapted position (fig. 22). The coneto-rod ratio in both species is 2:1, and the rod disks in the trout now number 800 and the infoldings in the cones 340. Scattered sparse large green-sensitive single cones in the mosaic position of double cones are observed 46 Neuroembryol Aging 2006–07;4:31–60 (fig.

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Development and Aging of the Vertebrate Visual System by D.E. Lorke


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