Antwort von retinalen Ganglienzellen bei freibeweglichen Kröten (Bufo bufo L.)

  title={Antwort von retinalen Ganglienzellen bei freibeweglichen Kr{\"o}ten (Bufo bufo L.)},
  author={J. -P. Ewert and Holger Borchers},
  journal={Journal of comparative physiology},
SummaryThe development of a miniature headpiece with which action potentials can be recorded from single neurones in the visual pathway of freely moving toads is described (Figs. 2, 3, and 4). At first two questions were posed: (1) Do the retinal „off” and „on-off” ganglion cells respond when the toad casts a shadow on the retina while its eye is closed? (2) In view of the fact that toads do not perform any involuntary eye movements to help them receive information about the stationary… 
Eye closure in toads (Bufo bufo L.) does not produce off responses in retinal on-off ganglion cells: A question of efferent commands
New results from experiments in freely moving unrestrained toads with chronically implanted twin micro recording electrodes show that theoff response of ganglion cells in the toad's retina fail to occur if the animal closes its eye completely, which may indicate efferent inhibition in retinal networks.
A frog's eye view: Foundational revelations and future promises.
Influence of the background for discriminating object motion from self-induced motion in toadsBufo bufo (L.)
It is concluded that, in the biotope, the textured background plays a decisive role in the discrimination between object motion and self-induced motion.
Fixational eye movements across vertebrates: comparative dynamics, physiology, and perception.
Five decades of fixational eye movement studies in non-human vertebrates in humans and primates are reviewed, and the existing evidence concerning their physiological and perceptual effects are discussed.
Flicker-induced eye movements and the behavioural temporal cut-off frequency in a nocturnal spider
A behavioural cut-off frequency of only a few cycles per second is well in line with the temporal properties of the photoreceptor cells determined using intracellular recordings and suit well C. salei's lifestyle as a nocturnal sit-and-wait hunter.
Responses of salamanders to stationary visual patterns
Salamandra salamandra exhibits prey-catching responses to stationary visual patterns if it has previously been stimulated by a moved dummy prey, and if an odor stimulus is associated with a stationary visual pattern the choice behavior may be altered, but visual stimuli play the greater role.
Experimental analysis of the prey catching behavior ofHydromantes italicus Dunn (Amphibia, Plethodontidae)
  • G. Roth
  • Biology, Environmental Science
    Journal of comparative physiology
  • 2004
The Italian bolitoglossine salamanderHydromantes italicus shows a periodic cave life and is able to detect prey by smell only both in total darkness and in the light, while the prey catching behavior with regard to smelling objects is inhibited by the absence of visual contrast.
On the performance of the visual system in the nocturnal hunting spider Cupiennius salei
Die vorliegende Arbeit beschaftigt sich mit dem visuellen System von Cupiennius salei, einer nachtaktiven Jagdspinne, die als Modellorganismus fur die Neuroethologie etabliert ist. In zwei Studien
Neural mechanisms of auditory scene analysis in a non-mammalian animal model
This paper presents a meta-anatomy of the immune system and its role in reward and punishment, which has implications for both social reinforcement and punishment in the context of addiction.


Movement-sensitive neurones in the toad's retina
Recordings from single optic nerve fibers of the common toad Bufo bufo (L.) have revealed three types of retinal ganglion cells which correspond to classes II, III and IV in the frog, which are compared with quantitative results previously obtained from corresponding behavioural experiments concerning visually induced prey-catching and avoidance reactions.
The efference copy neurone.
It is suggested that neurones which fire at the same time as saccades are efference copy neurones, responsible for perceptual stability during eye movements, and are not tectal motoneurones, because their discharge patterns are unaffected by darkness or paralysis.
Efferent fibers in the frog optic nerve.
What the Frog's Eye Tells the Frog's Brain
The results show that for the most part within that area of the optic nerve of a frog, it is not the light intensity itself but rather the pattern of local variation of intensity that is the exciting factor.
Das Reafferenzprinzip
~) Wenn man den Strum im Kondensatorkreis um-nittelbar dureh die Spulen Sp~ und Sp~ hindurchsehickt, wird die Phase der Ablenkung des Kathodenstrahlbiindels zur Anfaehung ungeeignet. Die Absicht
Das Fehlen unwillkürlicher Augenbewegungen beim Frosch
[Activity of retinal detectors in frogs in conditions of unrestrained behavior].
[The life history of the toad, Bufo bufo (L.); the orientation problem].
  • H. Heusser
  • Biology, Medicine
    Revue suisse de zoologie; annales de la Societe zoologique suisse et du Museum d'histoire naturelle de Geneve
  • 1969