Synthesis, structure determination and characterization of novel organometallic chromium hexacarbonyl derivatives via ligand (L) substitution / by Hamdya Farhana, Mohidin Yahya

“…From these, the substitution reaction using Tris-(4-fluorophenyl)phosphene resulted in the formation of a fine bright yellow crystal. …”
Get full text

Efficacy of neuroprotective treatment including pyrimidine nucleotides in secondary uveitic glaucoma by V. V. Savko, V. V. Savko Jnr

“…Each patient underwent visual acuity measurement and perimetry. In addition, phosphene threshold current (PTC) and critical frequency of phosphene (CFP) were determined. …”
Get full text

Montage matters : the influence of transcranial alternating current stimulation on human physiological tremor by Mehta, A, Pogosyan, A, Brown, P, Brittain, J

“…We additionally controlled for the role of phosphenes in influencing motor output by assessing the response of tremor to photic stimulation, through self-reported phosphene ratings. …”

Emergency resuscitation extracorporeal membrane oxygenation (ER ECMO) in 60 saves life by Gowtham Vijayakumar, Ajai Rangasamy, Dhilipan Kumar, Ramesh Varadharajan, Gunaseelan Ramalingam

“…Aluminum phosphide (ALP) is one of the most commonly used pesticides worldwide with high mortality rates primarily due to the production of phosphene gas which causes severe mitochondrial damage leading to refractory myocardial depression, refractory hypotension, severe metabolic acidosis, and acute respiratory distress syndrome.[1] There is no antidote for ALP poisoning and treatment remains mainly supportive. …”
Get full text

Use of Vasavital® in patients with diabetic retinopathy by Khramenko N. I., Umanets M. M., Medvedovska N. V., Levytska G. V., Rozanova Z. A.

“…Eleven patients (22 eyes) with NPDR and ten patients (20 eyes) with PPDR underwent electrophysiological studies of electrically evoked phosphene threshold (EEPT) and critical frequency of phosphene disappearance (CFPD), before and after a course of Vasavital treatment. …”
Get full text

Efficacy of complex neuroprotection in glaucomatous optic neuropathy by O.V. Guzun, N.I. Khramenko, S.B. Slobodianyk, V.S. Ponomarchuk, O.A. Peretyagin

“…A combined treatment including LS of the optic nerve and the papillomacular bundle followed by a six-month vitamin and antioxidant supplement therapy with resveratrol (1 mg) in patients with glaucomatous optical neuropathy contributes to: an increase in visual acuity by 26%; an increase in the visual system sensitivity, evidenced by a decrease of phosphene threshold current by 10%; an improvement in ocular blood flow by 8%; a decrease of intraocular vasospasm by 18%; and a significant decrease in overall retinal light sensitivity by 23%. …”
Get full text

Assessment of visual evoked potential characteristics and their relationship with functional parameters in different stages of primary open angle glaucoma by L.M. Stotska

“…The visual system sensitivity (phosphene threshold current) in patients with preglaucoma, mild- and moderate-stage POAG was within the normal range. …”
Get full text

Enhanced cortical excitability in grapheme-color synesthesia and its modulation. by Terhune, D, Tai, S, Cowey, A, Popescu, T, Cohen Kadosh, R

“…Using transcranial magnetic stimulation, we show that synesthetes display 3-fold lower phosphene thresholds than controls during stimulation of the primary visual cortex. …”

Biophysical determinants of transcranial magnetic stimulation: effects of excitability and depth of targeted area. by Stokes, M, Barker, A, Dervinis, M, Verbruggen, F, Maizey, L, Adams, R, Chambers, C

“…In 30 participants, we measured motor threshold (MT) and phosphene threshold (PT) at the scalp surface and at coil-scalp distances of 3.17, 5.63, and 9.03 mm. …”

Patient-specific computational models of retinal prostheses by Kathleen E. Kish, Alex Yuan, James D. Weiland

“…Not all electrodes induce perception at the same stimulus amplitude, requiring clinicians to manually establish a visual perception threshold for each one. Phosphenes created by single-electrode stimuli can also vary in shape, size, and brightness. …”
Get full text

Enhanced Artificial Vision for Visually Impaired Using Visual Implants by Hossein Mahvash Mohammadi, Mohammad Hadi Edrisi, Yvon Savaria

“…However, users’ satisfaction is not very high due to the very low resolution of the phosphene images and features created by this device. …”
Get full text

Why Temporal Inference Stimulation May Fail in the Human Brain: A Pilot Research Study by Krisztián Iszak, Simon Mathies Gronemann, Stefanie Meyer, Alexander Hunold, Jana Zschüntzsch, Mathias Bähr, Walter Paulus, Andrea Antal

“…Herein, we directly test and compare three different structures: firstly, we perform peripheral nerve and muscle stimulation quantifying muscle twitches as readout, secondly, we stimulate peri-orbitally with phosphene perception as a surrogate marker, and thirdly, we attempt to modulate the mean power of alpha oscillations in the occipital area as measured with electroencephalography (EEG). …”
Get full text

The phase of plasticity-induced neurochemical changes of high-frequency repetitive transcranial magnetic stimulation are different from visual perceptual learning by Shang-Hua N. Lin, Yun R. Lien, Kazuhisa Shibata, Yuka Sasaki, Takeo Watanabe, Ching-Po Lin, Li-Hung Chang

“…Furthermore, HF rTMS temporally decreased the thresholds for detecting phosphene and perceiving low-contrast stimuli, indicating increased visual plasticity. …”
Get full text

Clinical efficacy of treatment for subclinical-stage axial diabetic optic neuropathy by M.A. Karliychuk, P.A. Bezditko

“…We found that our treatment attenuated the progression of optic nerve damage in subclinical-stage axial DON, with 25.9% better visual acuity, 29.5 % lower electrically evoked phosphene thresholds, 69.3% less ganglion cell complex (GCC) focal loss volume (FLV), and 29.8% less thickness of the cribriform plate compared to controls at 25.5 months. …”
Get full text

Continuous and intermittent theta burst stimulation to the visual cortex do not alter GABA and glutamate concentrations measured by magnetic resonance spectroscopy by Karlene S. Stoby, Sara A. Rafique, Georg Oeltzschner, Jennifer K. E. Steeves

“…Visual cortical excitability, measured using phosphene thresholds, remained unchanged following both cTBS and iTBS conditions. …”
Get full text

Clinical efficacy of combination treatment for advanced-stage axial diabetic optic neuropathy by M.A. Karliychuk

“…Results: The combined adjunct treatment was found to result in improvements in study indices in 83.9% of patients of the adjunct group, with 191% better visual acuity (p < 0.05), 235.0% lower electrically evoked phosphene thresholds (p < 0.05), 38.5% less ganglion cell complex (GCC) focal loss volume (FLV), and 36.5% less thickness of the lamina cribrosa compared to controls at 25.5 months. …”
Get full text

Continuous and intermittent theta burst stimulation of primary visual cortex do not modulate resting state functional connectivity: A sham‐controlled multi‐echo fMRI study by Remy Cohan, Sara A. Rafique, Karlene S. Stoby, Diana J. Gorbet, Jennifer K. E Steeves

“…In addition, we also measured pre‐ and post‐TBS phosphene thresholds (PTs) to examine the modulatory effects of TBS on cortical excitability. …”
Get full text

Optogenetic stimulation of the primary visual cortex drives activity in the visual association cortex by Michael Ortiz-Rios, Beshoy Agayby, Fabien Balezeau, Marcus Haag, Samy Rima, Jaime Cadena-Valencia, Michael C. Schmid

“…Stimulating this pathway during a perceptual decision task effectively elicited a phosphene percept in the receptive field of the stimulated neurons in one monkey. …”
Get full text

Regional and central hemodynamics in ischemic optic neuropathy by N.I. Khramenko, N.V. Konovalova, O.V. Guzun

“…Patients underwent assessment of visual acuity, ophthalmoscopy, biomicroscopy, perimetry, intraocular pressure (IOP) and systemic blood pressure measurements, examination of the electrical sensitivity of the optic nerve and critical frequency of phosphene disappearance, ophthalmic rheography (ORG) and rheoencephalography (REG). …”
Get full text

Programmable synthetic hallucinations : towards a boundless mixed reality by Novy, Daniel E.(Daniel Edward)

Get full text