Is critical flicker fusion a trait marker?

2002 ◽  
Vol 17 ◽  
pp. 120
Author(s):  
F. Cavaglia ◽  
F. Simões do Couto ◽  
A. Matos-Pires ◽  
R. Cabrita ◽  
F. Arriaga
Keyword(s):  
Critical Flicker Fusion ◽  
Trait Marker ◽  
Flicker Fusion

scholarly journals Tolerability, pharmacokinetics and night-time effects on postural sway and critical flicker fusion of gaboxadol and zolpidem in elderly subjects

2009 ◽  
Vol 67 (2) ◽  
pp. 180-190 ◽  
Author(s):  
Julia Boyle ◽  
Philippe Danjou ◽  
Robert Alexander ◽  
Nicole Calder ◽  
Cynthia Gargano ◽  
...  
Keyword(s):  
Postural Sway ◽  
Elderly Subjects ◽  
Critical Flicker Fusion ◽  
Night Time ◽  
Time Effects ◽  
Flicker Fusion

The effect of hypoxia on the critical flicker fusion threshold in pilots

2009 ◽  
Vol 22 (1) ◽  
Author(s):  
Olaf Truszczyński ◽  
Mieczysław Wojtkowiak ◽  
Marcin Biernacki ◽  
Krzysztof Kowalczuk
Keyword(s):  
Critical Flicker Fusion ◽  
Flicker Fusion

scholarly journals Critical Flicker Fusion Frequency: A Narrative Review

Medicina ◽  
2021 ◽  
Vol 57 (10) ◽  
pp. 1096
Author(s):  
Natalia D. Mankowska ◽  
Anna B. Marcinkowska ◽  
Monika Waskow ◽  
Rita I. Sharma ◽  
Jacek Kot ◽  
...  
Keyword(s):  
Visual Processing ◽  
Current Knowledge ◽  
Minimal Hepatic Encephalopathy ◽  
Future Research ◽  
Critical Flicker Fusion ◽  
Flicker Fusion Frequency ◽  
Fusion Frequency ◽  
Critical Flicker Fusion Frequency ◽  
Model Studies ◽  
Flicker Fusion

This review presents the current knowledge of the usage of critical flicker fusion frequency (CFF) in human and animal model studies. CFF has a wide application in different fields, especially as an indicator of cortical arousal and visual processing. In medicine, CFF may be helpful for diagnostic purposes, for example in epilepsy or minimal hepatic encephalopathy. Given the environmental studies and a limited number of other methods, it is applicable in diving and hyperbaric medicine. Current research also shows the relationship between CFF and other electrophysiological methods, such as electroencephalography. The human eye can detect flicker at 50–90 Hz but reports are showing the possibility to distinguish between steady and modulated light up to 500 Hz. Future research with the use of CFF is needed to better understand its utility and application.

scholarly journals Visuo-motor integration, vision perception and attention in mTBI patients. Preliminary findings

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250598
Author(s):  
Mariagrazia Benassi ◽  
Davide Frattini ◽  
Sara Garofalo ◽  
Roberto Bolzani ◽  
Tony Pansell
Keyword(s):  
Spatial Attention ◽  
Motor Skills ◽  
Motor Coordination ◽  
Fine Motor ◽  
Motor Deficits ◽  
Motor Ability ◽  
Critical Flicker Fusion ◽  
Visuomotor Coordination ◽  
Form Recognition ◽  
Flicker Fusion

Patients with mild traumatic brain injuries (mTBI) often report difficulties in motor coordination and visuo-spatial attention. However, the consequences of mTBI on fine motor and visuo-motor coordination are still not well understood. We aimed to evaluate whether mTBI had a concomitant effect on fine motor ability and visuo-motor integration and whether this is related to visual perception and visuo-spatial attention impairments, including patients at different symptoms stage. Eleven mTBI patients (mean age 22.8 years) and ten healthy controls participated in the study. Visuo-motor integration of fine motor abilities and form recognition were measured with the Beery-Buktenica Developmental Test of Visual-Motor Integration test, motion perception was evaluated with motion coherence test, critical flicker fusion was measured with Pocket CFF tester. Visuo-spatial was assessed with the Ruff 2 & 7 Selection Attention Test. mTBI patients showed reduced visuo-motor integration, form recognition, and motor deficits as well as visuo-spatial attention impairment, while motion perception and critical flicker fusion were not impaired. These preliminary findings suggest that the temporary brain insults deriving from mTBI compromise fine motor skills, visuomotor integration, form recognition, and visuo-spatial attention. The impairment in visuo-motor coordination was associated with speed in visuo-attention and correlated with symptoms severity while motor ability was correlated with time since concussion. Given the strong correlation between visuomotor coordination and symptom severity, further investigation with a larger sample seems warranted. Since there appeared to be differences in motor skills with respect to symptom stage, further research is needed to investigate symptom profiles associated with visuomotor coordination and fine motor deficits in mTBI patients.

scholarly journals HYGIENIC EVALUATION OF THE FONT DESIGN OF ELECTRONIC TEXTS PRESENTED ON A LAPTOP

2019 ◽  
Vol 98 (12) ◽  
pp. 1402-1407
Author(s):  
Vladislav R. Kuchma ◽  
S. V. Sankov ◽  
N. K. Barsukova
Keyword(s):  
Educational Process ◽  
Critical Flicker Fusion ◽  
Visual Analyzer ◽  
Flicker Fusion Frequency ◽  
Fusion Frequency ◽  
Critical Flicker Fusion Frequency ◽  
Font Design ◽  
Psychophysiological State ◽  
The Impact ◽  
Flicker Fusion

Introduction. Currently, in connection with the large-scale introduction of the electronic educational resource in the educational process, it is especially relevant to search for optimal characteristics of presenting information on screens, taking into account the specifics of the electronic devices and age-related physiological features of the users’ visual system. The aim of the study was a physiological hygienic assessment of the impact of the font design of e-texts, presented on a laptop, on the psychophysiological state of students in grades 10-11. Material and methods. Psychophysiological testing of 43 schoolchildren in grades 10-11 without pathology of the vision organ was carried out on the NS-Psychotest complex, including the method of critical flicker fusion frequency to assess the state of the central part of the visual analyzer and the response to a moving object to determine the degree of the balance in nervous processes. The influence of reading illogical texts typed by a school headset was studied with a font size of 14, 12 and 10 points and a one-time reading of 200, 400 and 600 characters. Laptop Lenovo IdeaPad 720S-15 was used for the presentation of information. Results. High-grade schoolchildren were established to have the initial fatigue both of the visual analyzer and the nervous system as a whole. Boys showed better indices of the critical flicker fusion frequency than girls. Most schoolchildren had a balanced type of the inhibition and excitement processes. Methods of presenting information in electronic textbooks were shown to affect the psychophysiological state of high schoolchildren and may carry risks to their health. The hygienically rational design of electronic educational texts promotes the optimization of the psycho-functional state of the high schoolchildren’s body. Conclusion. The obtained results allow substantiating hygienic requirements for the font design of e-learning publications at the third stage of education.

Reply: Commentary on using critical flicker fusion frequency to measure gas narcosis

2021 ◽  
Vol 51 (2) ◽  
pp. 228-229
Author(s):  
Xavier CE Vrijdag ◽  
◽  
Hanna van Waart ◽  
Jamie W Sleigh ◽  
Simon J Mitchell ◽  
...  
Keyword(s):  
Critical Flicker Fusion ◽  
Flicker Fusion Frequency ◽  
Fusion Frequency ◽  
Critical Flicker Fusion Frequency ◽  
Flicker Fusion

MARIHUANA AND CRITICAL FLICKER FUSION

1974 ◽  
Vol 158 (2) ◽  
pp. 142-144 ◽  
Author(s):  
ROBERT SCHWIN ◽  
SHIRLEY Y. HILL ◽  
DONALD W. GOODWIN ◽  
BARBARA POWELL
Keyword(s):  
Critical Flicker Fusion ◽  
Flicker Fusion

The Effects of Nicotine on Attention, Information Processing, and Short-Term Memory in Patients with Dementia of the Alzheimer Type

1989 ◽  
Vol 154 (6) ◽  
pp. 797-800 ◽  
Author(s):  
Barbara Sahakian ◽  
Gemma Jones ◽  
Raymond Levy ◽  
Jeffrey Gray ◽  
David Warburton
Keyword(s):  
Information Processing ◽  
Marked Improvement ◽  
Short Term Memory ◽  
Reaction Times ◽  
Critical Flicker Fusion ◽  
Alzheimer Type ◽  
Short Term ◽  
Term Memory ◽  
Flickering Light ◽  
Flicker Fusion

Nicotine in patients with dementia of the Alzheimer type (DAT) producted a significant and marked improvement in discriminative sensitivity and reaction times on a computerised test of attention and information processing. Nicotine also improved the ability of DAT patients to detect a flickering light in a critical flicker fusion test. These results suggest that nicotine may be acting on cortical mechanisms involved in visual perception and attention, and support the hypothesis that acetylcholine transmission modulates vigilance and discrimination. Nicotine may therefore be of some value in treating deficits in attention and information processing in DAT patients.

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