Action of colour flicker stimuli on the electrical responses of retina and optic cortex in man

1964 ◽  
Vol 18 (1) ◽  
pp. 207-220 ◽  
Author(s):  
Marcel Monnier ◽  
O. Vatter ◽  
L. H�sli
Keyword(s):  
Optic Cortex ◽  
Electrical Responses

scholarly journals Stochastic Spatial Heterogeneity in Activities of H+-ATP-ases in Electrically Connected Plant Cells Decreases Threshold for Cooling-Induced Electrical Responses

2021 ◽  
Vol 22 (15) ◽  
pp. 8254
Author(s):  
Ekaterina Sukhova ◽  
Daria Ratnitsyna ◽  
Vladimir Sukhov
Keyword(s):  
Spatial Heterogeneity ◽  
Action Potentials ◽  
Higher Plants ◽  
Electrical Response ◽  
Plant Cells ◽  
Excitable Cells ◽  
Molecular Transporters ◽  
Positive Shift ◽  
Stochastic Heterogeneity ◽  
Electrical Responses

H+-ATP-ases, which support proton efflux through the plasma membrane, are key molecular transporters for electrogenesis in cells of higher plants. Initial activities of the transporters can influence the thresholds of generation of electrical responses induced by stressors and modify other parameters of these responses. Previously, it was theoretically shown that the stochastic heterogeneity of individual cell thresholds for electrical responses in a system of electrically connected neuronal cells can decrease the total threshold of the system (“diversity-induced resonance”, DIR). In the current work, we tested a hypothesis about decreasing the thresholds of generation of cooling-induced electrical responses in a system of electrically connected plant cells with increasing stochastic spatial heterogeny in the initial activities of H+-ATP-ases in these cells. A two-dimensional model of the system of electrically connected excitable cells (simple imitation of plant leaf), which was based on a model previously developed in our works, was used for the present investigation. Simulation showed that increasing dispersion in the distribution of initial activities of H+-ATP-ases between cells decreased the thresholds of generation of cooling-induced electrical responses. In addition, the increasing weakly influenced the amplitudes of electrical responses. Additional analysis showed two different mechanisms of the revealed effect. The increasing spatial heterogeneity in activities of H+-ATP-ases induced a weak positive shift of the membrane potential at rest. The shift decreased the threshold of electrical response generation. However, the decreased threshold induced by increasing the H+-ATP-ase activity heterogeneity was also observed after the elimination of the positive shift. The result showed that the “DIR-like” mechanism also participated in the revealed effect. Finally, we showed that the standard deviation of the membrane potentials before the induction of action potentials could be used for the estimation of thresholds of cooling-induced plant electrical responses. Thus, spatial heterogeneity in the initial activities of H+-ATP-ases can be a new regulatory mechanism influencing the generation of electrical responses in plants under actions of stressors.

scholarly journals Light-induced increases in cGMP metabolic flux correspond with electrical responses of photoreceptors.

1986 ◽  
Vol 261 (28) ◽  
pp. 13034-13042
Author(s):  
A Ames ◽  
T F Walseth ◽  
R A Heyman ◽  
M Barad ◽  
R M Graeff ◽  
...  
Keyword(s):  
Metabolic Flux ◽  
Electrical Responses

Electrical responses to two clicks: A simple statistical interpretation

1951 ◽  
Vol 13 (2) ◽  
pp. 69-77 ◽  
Author(s):  
William J. McGill ◽  
Walter A. Rosenblith
Keyword(s):  
Statistical Interpretation ◽  
Electrical Responses

Electrical responses and stable behavior of polyaniline-polyurethane concave lens array film in electrolyte

2015 ◽  
Vol 31 (4) ◽  
pp. 680-684 ◽  
Author(s):  
Xiaomin Meng ◽  
Xiaohang Yang ◽  
Hongjuan Wang ◽  
Ruokun Jia
Keyword(s):  
Lens Array ◽  
Concave Lens ◽  
Electrical Responses

Electrical responses of the pigeon eye to changes in wavelength of the stimulating light

1972 ◽  
Vol 12 (5) ◽  
pp. 981-991 ◽  
Author(s):  
Lorrin A. Riggs ◽  
Patricia M. Blough ◽  
Kenneth L. Schafer
Keyword(s):  
Electrical Responses

Effect of serotonin (5-hydroxytryptamine) on evoked potentials of the optic cortex in unanesthetized rabbits

1966 ◽  
Vol 62 (2) ◽  
pp. 897-900
Author(s):  
V. N. Provodina ◽  
E. A. Gromova
Keyword(s):  
Evoked Potentials ◽  
Optic Cortex

Co-sputtered metal and polymer nanocomposite films and their electrical responses for gas sensing application

2016 ◽  
Vol 368 ◽  
pp. 114-121 ◽  
Author(s):  
Nopporn Rujisamphan ◽  
Roy E. Murray ◽  
Fei Deng ◽  
Thidarat Supasai
Keyword(s):  
Gas Sensing ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Sensing Application ◽  
Electrical Responses

Cellular pathways of the conducted electrical response in arterioles of hamster cheek pouch in vitro

1995 ◽  
Vol 269 (6) ◽  
pp. H2031-H2038 ◽  
Author(s):  
J. Xia ◽  
T. L. Little ◽  
B. R. Duling
Keyword(s):  
Electrical Response ◽  
Electrical Current ◽  
Cell Types ◽  
Cheek Pouch ◽  
Resting Membrane Potential ◽  
Hamster Cheek Pouch ◽  
Cellular Pathways ◽  
Current Flows ◽  
Electrical Responses

We have previously shown that conducted vasomotor responses follow patterns that are consistent with a passive spread of electrical current along the length of the arterioles [(Xia and Duling, Am. J. Physiol. 269 (Heart Circ. Physiol. 38): H2022-H2030, 1995]. In this study, we define the cells through which the current flows. Isolated arterioles of hamster cheek pouch were used. The mean resting membrane potential (RMP) for randomly sampled arteriolar cells was -67 mV. When cell types were identified by dye injection, the RMPs were -68 and -67 mV for smooth muscle (SM) and endothelium (EC), respectively. Pulses of KCl induced transient, monophasic depolarizations at the site of stimulation (local), which were conducted decrementally along the length of the arteriole over several millimeters. During electrical conduction, three patterns of responses could be observed, but identical patterns of the conducted electrical responses were always observed in SM and EC. Phenylephrine stimulation also caused transient local and conducted depolarizations in both SM and EC. As with KCl stimuli, shapes of conducted electrical responses were identical in records made in both cell types. The results suggest that SM and EC are electrically coupled both homocellularly and heterocellularly.

Plasma-membrane electrical responses to salt and osmotic gradients contradict radiotracer kinetics, and reveal Na+-transport dynamics in rice (Oryza sativa L.)

Planta ◽  
2018 ◽  
Vol 249 (4) ◽  
pp. 1037-1051 ◽  
Author(s):  
Ahmed M. Hamam ◽  
Devrim Coskun ◽  
Dev T. Britto ◽  
Darren Plett ◽  
Herbert J. Kronzucker
Keyword(s):  
Oryza Sativa ◽  
Plasma Membrane ◽  
Oryza Sativa L ◽  
Na Transport ◽  
Transport Dynamics ◽  
Electrical Responses
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