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Sensory Evolution on the ThresholdAdaptations in Secondarily Aquatic Vertebrates$
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J. G. M. Thewissen

Print publication date: 2008

Print ISBN-13: 9780520252783

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520252783.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 20 September 2021

Structure and Function of the Retina in Aquatic Tetrapods

Structure and Function of the Retina in Aquatic Tetrapods

(p.148) (p.149) 10 Structure and Function of the Retina in Aquatic Tetrapods
Sensory Evolution on the Threshold

Tom Reuter

Leo Peichl

University of California Press

This chapter discusses the anatomy and physiology of the retina in aquatic tetrapods. It focuses on the input and output stages of retinal processing: the photoreceptors and the ganglion cells. It describes the characteristics of rod and cone visual pigments, photoreceptor sensitivity, and the importance of temporal summation of photoreceptor signals. It also discusses ganglion cell densities and topographies, and examines how ganglion cells receive photoreceptor inputs and determine anatomical visual acuity.

Keywords:   retina, aquatic tetrapods, photoreceptors, ganglion cells, visual pigments, photoreceptor sensitivity, temporal summation, visual acuity

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