Results 11 to 20 of about 3,768 (215)

Towards biologically plausible phosphene simulation for the differentiable optimization of visual cortical prostheses [PDF]

eLife
Blindness affects millions of people around the world. A promising solution to restoring a form of vision for some individuals are cortical visual prostheses, which bypass part of the impaired visual pathway by converting camera input to electrical ...
Maureen van der Grinten, Jaap de Ruyter van Steveninck, Antonio Lozano, Laura Pijnacker, Bodo Rueckauer, Pieter Roelfsema, Marcel van Gerven, Richard van Wezel, Umut Güçlü, Yağmur Güçlütürk   +9 more
doaj   +2 more sources

Frequency responses of human magnetophosphene perception thresholds during dark adaptation point to rod modulation. [PDF]

Exp Physiol
Abstract Magnetophosphenes are flickering lights perceived when an extremely low frequency magnetic field generates a sufficiently strong electric field in the head. Understanding how phosphenes are produced is crucial, as they form the basis for international safety standards and guidelines for both workers and the general population.
Bouisset N, Carvallo A, Villard S, Laakso I, Legros A.   +4 more
europepmc   +2 more sources

Modulation of Visual Cortex Excitability by Continuous Theta Burst Stimulation Depends on Coil Type. [PDF]

PLoS ONE, 2016
Subthreshold continuous theta burst stimulation of the visual cortex has been reported to cause inhibitory effects on phosphene threshold. In contrast, we observed no inhibition in a former study applying higher stimulation intensities.
Sabrina Brückner, Thomas Kammer
doaj   +1 more source

Simulation-Based Designing of Suitable Stimulation Factors for Presenting Two Phosphenes Simultaneously to Lower Side of Field of View

Bioengineering, 2022
Using a phosphene has been discussed as a means of informing the visually impaired of the position of an obstacle. Obstacles underfoot have a risk, so it is necessary to inform the visually impaired.
Manami Kanamaru, Phan Xuan Tan, Eiji Kamioka   +2 more
doaj   +1 more source

Effect of ambient lighting on frequency dependence in transcranial electrical stimulation-induced phosphenes

Scientific Reports, 2022
Inconsistencies have been found in the relationship between ambient lighting conditions and frequency-dependence in transcranial electric stimulation (tES) induced phosphenes. Using a within-subjects design across lighting condition (dark, mesopic [dim],
Ian Evans, Stephen Palmisano, Rodney J. Croft   +2 more
doaj   +1 more source

Design of Electrode Placement for Presenting Phosphenes in the Lower Visual Field Based on Electric Field Simulation

Applied Sciences, 2021
Presenting visual information, called phosphenes, is a critical method for providing information on the position of obstacles for users of walking support tools for the visually impaired.
Manami Kanamaru, Phan Xuan Tan, Eiji Kamioka   +2 more
doaj   +1 more source

Phosphene Expressionism

, 2021
The shifting forms and colours visible on the inside of our eyelids in a darkened room are produced by phosphenes -- particles of light emitted from cells within the retina, which are detected by the optic nerve and imaged by the visual cortex. In this presentation, we briefly review how phosphenes have been the subject of contemporary artworks and are
Garbutt, Michael, ROENPAGEL, NICO, Transdisciplinary Imaging Conference, Dark Eden   +2 more
openaire   +3 more sources

Observations by human subjects on radiation- induced light flashes in fast-neutron, X-ray, and positive-pion beams [PDF]

, 1970
Exposure of human subjects to fast neutron beam to determine cause of light flashes observed by astronauts on lunar ...
Budinger, T. F., Lyman, J. T., Tobias, C. A.   +2 more
core   +4 more sources

High visual demand following theta burst stimulation modulates the effect on visual cortex excitability

Frontiers in Human Neuroscience, 2015
Modulatory effects of repetitive transcranial magnetic stimulation depend on the activity of the stimulated cortical area before, during, and even after application.
Sabrina eBrückner, Thomas eKammer
doaj   +1 more source

Changes in Thresholds of Electrically Evoked Phosphene and Electrical Lability of the Optic Nerve in the Ground Station Crew in the International Experiment SIRIUS 20/21

Oftalʹmologiâ, 2023
In the ground sealed station crew, during the 8 months international experiment SIRIUS 20/21 simulating an interplanetary flight, electrically induced phosphene (EIP) thresholds, which reflected the electrical sensitivity (ES) of the retina, and the ...
V. V. Neroev, M. V. Zueva, V. I. Kotelin, O. M. Manko, I. V. Egorova, I. V. Tsapenko, A. M. Aleskerov, D. A. Podyanov   +7 more
doaj   +1 more source