Action potentials from the frog's retina

Action potentials from the frog's retina.

Direction-Selective Dendritic Action Potentials in Rabbit Retina

Dendritic spikes that propagate toward the soma are well documented, but their physiological role remains uncertain. Our in vitro patch-clamp recordings and two-photon calcium imaging show that direction-selective retinal ganglion cells (DSGCs) utilize orthograde dendritic spikes during physiological activity. DSGCs signal the direction of image motion. Excitatory subthreshold postsynaptic pote...

Action potentials are required for the lateral transmission of glycinergic transient inhibition in the amphibian retina.

Transient lateral inhibition (TLI), the suppression of responses of a ganglion cell to light stimuli in the receptive field center by changes in illumination in the receptive field surround, was studied in light-adapted mud puppy and tiger salamander retinas using both eyecup and retinal slice preparations. In the eyecup, TLI was measured in on-off ganglion cells as the ability of rotating, con...

oscillatory potentials in diabetic retina without retinopathy

purpose: to study recordings of oscillatory potentials (ops) of the electroretinogram (erg) in diabetic eyes that have no visible fundus alterations, to ascertain whether changes in sensitivity are evident when compared with recordings from age-matched controls. methods: ops of the erg were measured from 68 eyes of 34 patients with diabetes without retinopathy and from 30 eyes of 15 normal subj...

S-Potentials in the Skate Retina

The S-potentials recorded intracellularly from the all-rod retina of the skate probably arise from the large horizontal cells situated directly below the layer of receptors. These cells hyperpolarize in response to light, irrespective of stimulus wavelength, and the responses in photopic as well as scotopic conditions were found to be subserved by a single photopigment with lambda(max) = 500 nm...