A Spatial Cognition Paradigm to Assess the Impact of Night Vision Goggles on Way-Finding Performance

2010 ◽  
pp. 111-122
Author(s):  
Michelle Gauthier ◽  
Avi Parush
Keyword(s):  
Spatial Cognition ◽  
Night Vision ◽  
Way Finding ◽  
The Impact

The Impact of Night Vision Goggles on Way-Finding Performance and the Acquisition of Spatial Knowledge

2008 ◽  
Vol 50 (2) ◽  
pp. 311-321 ◽  
Author(s):  
Michelle Sylvia Gauthier ◽  
Avi Parush ◽  
Todd Macuda ◽  
Denis Tang ◽  
Gregory Craig ◽  
...  
Keyword(s):  
Spatial Knowledge ◽  
Night Vision ◽  
Way Finding ◽  
The Impact

scholarly journals Temporal resolution of single-photon responses in primate rod photoreceptors and limits imposed by cellular noise

2019 ◽  
Vol 121 (1) ◽  
pp. 255-268 ◽  
Author(s):  
Greg D. Field ◽  
Valerie Uzzell ◽  
E. J. Chichilnisky ◽  
Fred Rieke
Keyword(s):  
Temporal Resolution ◽  
Moving Objects ◽  
Single Photon ◽  
Night Vision ◽  
Detection Sensitivity ◽  
Sensory Receptor ◽  
Rod Photoreceptor ◽  
Scotopic Vision ◽  
Central Processing ◽  
The Impact

Sensory receptor noise corrupts sensory signals, contributing to imperfect perception and dictating central processing strategies. For example, noise in rod phototransduction limits our ability to detect light, and minimizing the impact of this noise requires precisely tuned nonlinear processing by the retina. But detection sensitivity is only one aspect of night vision: prompt and accurate behavior also requires that rods reliably encode the timing of photon arrivals. We show here that the temporal resolution of responses of primate rods is much finer than the duration of the light response and identify the key limiting sources of transduction noise. We also find that the thermal activation rate of rhodopsin is lower than previous estimates, implying that other noise sources are more important than previously appreciated. A model of rod single-photon responses reveals that the limiting noise relevant for behavior depends critically on how rod signals are pooled by downstream neurons. NEW & NOTEWORTHY Many studies have focused on the visual system’s ability to detect photons, but not on its ability to encode the relative timing of detected photons. Timing is essential for computations such as determining the velocity of moving objects. Here we examine the timing precision of primate rod photoreceptor responses and show that it is more precise than previously appreciated. This motivates an evaluation of whether scotopic vision approaches limits imposed by rod temporal resolution.

scholarly journals The impact of early structural enrichment on spatial cognition in layer chicks

2019 ◽  
Vol 164 ◽  
pp. 167-174 ◽  
Author(s):  
Kate I Norman ◽  
Jessie E.C Adriaense ◽  
Christine J Nicol
Keyword(s):  
Spatial Cognition ◽  
The Impact

Low-Technology Demonstrations of the Role of Peripheral Vision in Human Factors and Ergonomics

2002 ◽  
Vol 46 (8) ◽  
pp. 793-797
Author(s):  
William F. Moroney
Keyword(s):  
Visual Field ◽  
Optical Flow ◽  
Peripheral Vision ◽  
Night Vision ◽  
Flow Data ◽  
Relevant Research ◽  
Human Factors And Ergonomics ◽  
Research Findings ◽  
The Impact

This paper provides two demonstrations that highlight the importance of peripheral vision issues in system design. The first demonstration concerns the ability of the visual system to detect motion, while the second addresses the impact of reduction of visual field on the perception of optical flow data. Educators can use these demonstrations as the basis for discussions about the design implications for warning displays, attention gathering devices, optical flow, off-axis accidents, aging, attention, and night vision goggles. These demonstrations can be used at both the undergraduate and graduate levels. Relevant research findings are also discussed, and references for further exploration of the topics are provided.

scholarly journals Saccular Impairment in Alzheimer’s Disease Is Associated with Driving Difficulty

2017 ◽  
Vol 44 (5-6) ◽  
pp. 294-302 ◽  
Author(s):  
Eric X. Wei ◽  
Esther S. Oh ◽  
Aisha Harun ◽  
Matthew Ehrenburg ◽  
Yuri Agrawal
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Cognitive Function ◽  
Spatial Cognition ◽  
Fear Of Falling ◽  
Regression Analyses ◽  
Memory Clinic ◽  
Vestibular Loss ◽  
Road Map ◽  
The Impact

Background/Aims: Patients with Alzheimer’s disease (AD) experience increased rates of vestibular loss. Recent studies suggest that saccular impairment in mild cognitive impairment (MCI) and AD patients is associated with impaired spatial cognitive function. However, the impact of saccular impairment on everyday behaviors that rely on spatial cognitive function is unknown. Methods: We recruited 60 patients (21 MCI and 39 AD) from an interdisciplinary Memory Clinic. Saccular function was measured, and a visuospatial questionnaire was administered to assess whether participants experienced impairments in terms of driving difficulty, losing objects, falls, and fear of falling. Results: In multiple logistic regression analyses, MCI and AD patients with bilateral saccular impairment had a significant, greater than 12-fold odds of driving difficulty (OR 12.1, 95% CI 1.2, 117.7) compared to MCI and AD patients with normal saccular function, and the association appears to be mediated by spatial cognition as measured by the Money Road Map Test. Conclusion: This study suggests a novel link between saccular impairment and driving difficulty in MCI and AD patients and demonstrates that driving difficulty may be a real-world manifestation of impaired spatial cognition associated with saccular impairment.

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