ZfN: Search Results

1	Author	SimonB. Laughlin	Requires cookie*
	Title
	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

2	Author	EricJ W Arrant, RobertB. Pinter	Requires 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