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'Photoreceptors' in keywords Facet   Publication Year 1990  [X]
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1990[X]
1Author    EricJ W Arrant, RobertB. PinterRequires cookie*
 Title      
 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