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'Dragonfly' in keywords Facet   section ZfN Section C  [X]
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1990 (1)
1975 (1)
1Author    SimonB. LaughlinRequires cookie*
 Abstract    Intracellular recordings show that the receptors and second-order interneurons of the dragonfly compound eye change their sensitivity in response to maintained illumina­ tion. Comparison of receptor with interneuron shows that neural mechanisms act to ensure that the modulation of interneuron membrane potential that is set up by contrast changes is independent of background intensity. 
  Reference    (Z. Naturforsch. 30c, 306—308 [1975]; received January 3 1975) 
  Published    1975 
  Keywords    Dragonfly, Receptor, Interneuron, Light-adaptation 
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 TEI-XML for    default:Reihe_C/30/ZNC-1975-30c-0306_n.pdf 
 Identifier    ZNC-1975-30c-0306_n 
 Volume    30 
2Author    EricJ W Arrant, RobertB. PinterRequires cookie*
 Abstract    Intracellular recordings o f angular sensitivity from the photoreceptors o f Aeschnid dragonflies (Hemianax papuensis and Aeschna brevistyla) are used to determine the magnitude and time course o f acuity changes follow ­ ing alterations o f the state o f light or dark adaptation. Acuity is defined on the basis o f the acceptance angle, A q (the half-width o f the angular-sensitivity function). The maximally light-adapted value o f A q is half the dark-adapted value, indicating greater acuity during light adaptation. Following a change from light to dark adaptation, A q increases slowly, requiring at least 3 min to reach its dark-adapted value. In contrast, the reverse change (dark to light) induces a rapid reduction o f A q , and at maximal adapting luminances, this reduction takes place in less than 1 0 sec. 
  Reference    Z. Naturforsch. 45c, 137—141 (1990); received September 14 1989 
  Published    1990 
  Keywords    Compound Eye, Adaptation, Photoreceptors, Spatial Acuity, Dragonfly 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0137_n.pdf 
 Identifier    ZNC-1990-45c-0137_n 
 Volume    45