scholarly journals Conceptual Method of Temperature Sensation in Bionic Hand by Extraordinary Perceptual Phenomenon

2021 ◽  
Author(s):  
Saeed Bahrami Moqadam ◽  
Ahamd Saleh Asheghabadi ◽  
Farzaneh Norouzi ◽  
Hamed Jafarzadeh ◽  
Ali Khosroabadi ◽  
...  
Keyword(s):  
Temperature Sensation ◽  
Perceptual Phenomenon

A thalamic nucleus specific for pain and temperature sensation

Nature ◽  
1994 ◽  
Vol 372 (6508) ◽  
pp. 770-773 ◽  
Author(s):  
A. D. Craig ◽  
M. C. Bushnell ◽  
E.-T. Zhang ◽  
A. Blomqvist
Keyword(s):  
Thalamic Nucleus ◽  
Temperature Sensation

The Interpretation of Stereo-Disparity Information: The Computation of Surface Orientation and Depth

Perception ◽  
1982 ◽  
Vol 11 (4) ◽  
pp. 387-407 ◽  
Author(s):  
John Mayhew
Keyword(s):  
Surface Orientation ◽  
The Other ◽  
Surface Patch ◽  
Viewing Distance ◽  
Horizontal Disparity ◽  
Planar Surface ◽  
Local Surface ◽  
Stereo Disparity ◽  
The Gaze ◽  
Perceptual Phenomenon

Two methods for interpreting disparity information are described. Neither requires extraretinal information to scale for distance: one method uses horizontal disparities to solve for the viewing distance, the other uses the vertical disparities. Method 1 requires the assumption that the disparities derive from a locally planar surface. Then from the horizontal disparities measured at four retinal locations the viewing distance and the equation of local surface ‘patch’ can be obtained. Method 2 does not need this assumption. The vertical disparities are first used to obtain the values of the gaze and viewing distance. These are then used to interpret the horizontal disparity information. An algorithm implementing the methods has been tested and is found to be subject to a perceptual phenomenon known as the ‘induced effect’.

scholarly journals Hyperalagesia with loss of temperature sensation in one side of the body due to pinpoint infarction of contralateral spinothalamic tract

2009 ◽  
Vol 49 (5) ◽  
pp. 262-266 ◽  
Author(s):  
Yoko Kashiwamura ◽  
Motoharu Kawai ◽  
Junichi Ogasawara ◽  
Michiaki Koga ◽  
Kiyoshi Negoro ◽  
...  
Keyword(s):  
The Body ◽  
Spinothalamic Tract ◽  
Temperature Sensation

scholarly journals An online headphone screening test based on dichotic pitch

2020 ◽  
Author(s):  
Alice E. Milne ◽  
Roberta Bianco ◽  
Katarina C. Poole ◽  
Sijia Zhao ◽  
Andrew J. Oxenham ◽  
...  
Keyword(s):  
False Positive ◽  
Background Noise ◽  
Screening Test ◽  
False Positive Rate ◽  
New Method ◽  
Additional Test ◽  
Positive Rate ◽  
Online Methods ◽  
Perceptual Phenomenon

AbstractOnline experimental platforms can be used as an alternative to, or complement, lab-based research. However, when conducting auditory experiments via online methods, the researcher has limited control over the participants’ listening environment. We offer a new method to probe one aspect of that environment, headphone use. Headphones not only provide better control of sound presentation but can also “shield” the listener from background noise. Here we present a rapid (< 3 min) headphone screening test based on Huggins Pitch (HP), a perceptual phenomenon that can only be detected when stimuli are presented dichotically. We validate this test using a cohort of “Trusted” online participants who completed the test using both headphones and loudspeakers. The same participants were also used to test an existing headphone test (AP test; Woods et al., 2017, Attention Perception Psychophysics). We demonstrate that compared to the AP test, the HP test has a higher selectivity for headphone users, rendering it as a compelling alternative to existing methods. Overall, the new HP test correctly detects 80% of headphone users and has a false-positive rate of 20%. Moreover, we demonstrate that combining the HP test with an additional test–either the AP test or an alternative based on a beat test (BT)–can lower the false-positive rate to ~ 7%. This should be useful in situations where headphone use is particularly critical (e.g., dichotic or spatial manipulations). Code for implementing the new tests is publicly available in JavaScript and through Gorilla (gorilla.sc).

scholarly journals Analysis of Hot-Cold Confusion on Fingers

2021 ◽  
Vol 33 (5) ◽  
pp. 1117-1127
Author(s):  
Satoshi Hashiguchi ◽  
Keyword(s):  
Thermal Properties ◽  
Proximal Phalanx ◽  
Mutual Effect ◽  
Distal Phalanx ◽  
Experimental Results ◽  
Middle Phalanx ◽  
Temperature Sensation ◽  
Temperature Stimulus

The thermosensory system may misidentify a temperature stimulus with different thermal properties. The mechanism of this hot-cold confusion has not been clarified; hence, it has not yet been applied. In this study, we created a wearable temperature presentation device that is closer to the application and analyzed the tendency and mechanism of temperature confusion by analyzing the hot-cold confusion of temperature sensation in the fingers, which are most frequently in contact with objects. Two experiments were performed. In the first experiment, we presented stimuli on the tips of three fingers (first, second, and third fingers). In the second experiment, we presented stimuli at the center of the distal phalanx, middle phalanx, and proximal phalanx of the first finger. The experimental results indicated the occurrence of hot-cold confusion. Domination, in which the center is dominated by both ends, and a mutual effect, in which the center interacts with both ends, were observed.

A Perceptual Phenomenon and its Neurophysiological Correlate

Perception ◽  
1979 ◽  
Vol 8 (1) ◽  
pp. 43-46 ◽  
Author(s):  
Lamberto Maffei ◽  
Concetta Morrone ◽  
Mario Pirchio ◽  
Giulio Sandini
Keyword(s):  
Visual Cortex ◽  
Square Wave ◽  
Spatial Frequencies ◽  
Missing Fundamental ◽  
Perceptual Phenomenon

A square-wave grating from which the fundamental harmonic has been subtracted (missing fundamental grating) when viewed from a suitable distance appears similar to another grating of periodicity three times higher. The neurons of the visual cortex of the cat, in a given range of spatial frequencies characteristic of each cell, give similar responses to the two gratings.

Visual Perception of Apparent Motion Abides by Minimization Principles of Geometry

2021 ◽  
Author(s):  
Yaxin Liu ◽  
Stella F. Lourenco
Keyword(s):  
Visual Perception ◽  
Target Detection ◽  
Apparent Motion ◽  
Visual Space ◽  
Detection Task ◽  
Newtonian Physics ◽  
Kinematic Geometry ◽  
Shed Light ◽  
Target Detection Task ◽  
Perceptual Phenomenon

Apparent motion is a robust perceptual phenomenon in which observers perceive a stimulus traversing the vacant visual space between two flashed stimuli. Although it is known that the “filling-in” of apparent motion favors the simplest and most economical path, the interpolative computations remain poorly understood. Here, we tested whether the perception of apparent motion is best characterized by Newtonian physics or kinematic geometry. Participants completed a target detection task while Pacmen- shaped objects were presented in succession to create the perception of apparent motion. We found that target detection was impaired when apparent motion, as predicted by kinematic geometry, not Newtonian physics, obstructed the target’s location. Our findings shed light on the computations employed by the visual system, suggesting specifically that the “filling-in” perception of apparent motion may be dominated by kinematic geometry, not Newtonian physics.

Sign in / Sign up

Export Citation Format

Share Document