ISSN:
1432-2013
Keywords:
Retina
;
laterale Hemmung
;
Retina
;
Lateral Inhibition
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Description / Table of Contents:
Summary By means of microelectrodes action potentials of single optic nerve fibers from on-center neurons of the cat's retina were recorded. The latency of the inhibition of the neuronal activity elicited by light stimuli in the inhibitory receptive field periphery was measured. The inhibiting light stimuli (rings or bars) were projected into different parts of the receptive field periphery. From the spatial separations of the inhibiting light stimuli and the differences of the corresponding inhibition latencies the conduction velocity of lateral inhibition within the receptive field was measured. A value of 90–110 mm · sec−1 in the retina was found, which corresponds to about 400–480 degrees · sec−1 in the visual field.
Notes:
Zusammenfassung An retinalen On-Zentrum-Neuronen der Katze wurde die Latenz der Inhibition, die durch Lichtreize in der receptiven Feldperipherie ausgelöst wurde, gemessen. Die hemmenden Reize hatten verschiedene Abstände vom receptiven Feldzentrum. Aus der Differenz dieser räumlichen Distanzen und der Differenz der Hemmungslatenzzeiten ließ sich die Ausbreitungsgeschwindigkeit der lateralen Hemmung im receptiven Feld bestimmen. Sie beträgt 90–110 mm · sec−1 in der Netzhaut, was 400–480 grad · sec−1 im Gesichtsfeld entspricht.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00592128
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