Photoreception and Vision in InvertebratesM. A. Ali I see a man's life is a tedious one. Cymbeline, Act III, Sc. 6. It is well known that the best way to learn a subject is to teach it! Along the same lines one might also say that a pleasant way of learning a subject and at the same time getting to know quite a few of the workers active in it, is to arrange and to attend an Advanced Study Institute (ASI) or a workshop lasting about two weeks. This was and is the wisdom behind the NA TO-ASI programme and much as people fear that a fortnight may be too long, before it is over everyone feels that it was too short, especially if the weather had cooperated. Organising this ASI which resulted in this volume has been a very good learning experience. I started my career in research with invertebrates and retained an interest in them over the years due to my teaching a course and working sporadically on various aspects of photoreception in Polychaetes, Crustaceans and Insects. Thus, the thought of organising an ASI on photoreception and vision in invertebrates had been brewing in my mind for the past half a dozen years or so. It was felt that it will be desirable to do a bit of stock taking and discuss possible new approaches to the study of this matter. |
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Page 138
... layer and projects 1-3 cilia into the cup . Microvilli , formed from the ciliary membrane , lie in clumps at the base of the pigment cup and probably constitute the photoreceptors . Branched projections of the pigment cells form a ...
... layer and projects 1-3 cilia into the cup . Microvilli , formed from the ciliary membrane , lie in clumps at the base of the pigment cup and probably constitute the photoreceptors . Branched projections of the pigment cells form a ...
Page 361
... layer , n ° 2 , lie anterior to the n ° 1 layer ; they are separated by cytoplasmic extensions of the pigmentary cells . These rhabdomeres are parallel to those of the n ° 1 layer and to the aperture . These rhabdoms occur in the medio ...
... layer , n ° 2 , lie anterior to the n ° 1 layer ; they are separated by cytoplasmic extensions of the pigmentary cells . These rhabdomeres are parallel to those of the n ° 1 layer and to the aperture . These rhabdoms occur in the medio ...
Page 388
... layer described by Grenacher ( 1880 ) , Willem ( 1892 ) and Hesse ( 1901 ) . The results of Bähr's works ( 1971 , 1974 ) on L. forficatus is summarized below . The single eye consists of a corneal lens , corneagenous cells , Hüllzellen ...
... layer described by Grenacher ( 1880 ) , Willem ( 1892 ) and Hesse ( 1901 ) . The results of Bähr's works ( 1971 , 1974 ) on L. forficatus is summarized below . The single eye consists of a corneal lens , corneagenous cells , Hüllzellen ...
Contents
Prologue | 3 |
Natural Polarized Light and Vision | 63 |
Photoreception in Protozoa an Overview | 115 |
Copyright | |
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animal arthropods Autrum axons behavior Biol Buchner Calliphora cellules cellules rétiniennes cellules sensorielles cilia ciliary cilium Clément Comp compound eye crayfish crustaceans cytoplasm dendrites detectors direction distal dorsal Drosophila Drosophila melanogaster e-vector Eakin flies Franceschini function gradient granules Hamdorf Handbook of Sensory Hausen horizontal input insect intensity interneurons invertebrates Kirschfeld l'oeil lamina larvae Laughlin layer lens light lobula plate Lond medulla Meinertzhagen membrane metarhodopsin microvilli motion movement detection Muñoz-Cuevas Musca nematode neural neurons neuropil ocelli oculaire ommatidia ommatidies ommatidium optic organization orientation pattern photorécepteurs photoreceptor cells photosensitivity phototaxis Physiol pigment cells pigmentaires Platyhelminthes Poggio polarization sensitivity Polychètes postsynaptic Pourriot receptors region Reichardt retina retinular cells rhabdom rhabdomeric rhodopsin rotifers Salticidae Schwemer Sensory Physiology signal spatial species spectral sensitivity spiders Stavenga stimulus Strausfeld structure studies synapses tangential cells torque ultrastructure vertebrates vertical vision visual pigment visual system Waterman wavelength Wehner yeux Zool