Egocentric visual target position and velocity coding: Role of ocular muscle proprioception

1995 ◽  
Vol 23 (4) ◽  
pp. 423-435 ◽  
Author(s):  
Gabriel M. Gauthier ◽  
Jean-Louis Vercher ◽  
Jean Blouin
Keyword(s):  
Visual Target ◽  
Target Position ◽  
Muscle Proprioception ◽  
Ocular Muscle

Visual Target Velocity Coding through Ocular Muscle Proprioception

1995 ◽  
pp. 550-553
Author(s):  
Gabriel M. Gauthier ◽  
Jean-Louis Vercher ◽  
Jean Blouin
Keyword(s):  
Visual Target ◽  
Target Velocity ◽  
Muscle Proprioception ◽  
Ocular Muscle

The role of ocular muscle proprioception in visual localization of targets

Science ◽  
1990 ◽  
Vol 249 (4964) ◽  
pp. 58-61 ◽  
Author(s):  
G. Gauthier ◽  
D Nommay ◽  
J. Vercher
Keyword(s):  
Visual Localization ◽  
Muscle Proprioception ◽  
Ocular Muscle

scholarly journals Saccadic Suppression of Displacement Does Not Reflect a Saccade-Specific Bias to Assume Stability

Vision ◽  
2019 ◽  
Vol 3 (4) ◽  
pp. 49
Author(s):  
Sabine Born
Keyword(s):  
Visual Target ◽  
Target Position ◽  
Decisive Role ◽  
Saccadic Suppression ◽  
General Stability ◽  
Steady Fixation ◽  
Continuous Scale ◽  
Improved Performance

Across saccades, small displacements of a visual target are harder to detect and their directions more difficult to discriminate than during steady fixation. Prominent theories of this effect, known as saccadic suppression of displacement, propose that it is due to a bias to assume object stability across saccades. Recent studies comparing the saccadic effect to masking effects suggest that suppression of displacement is not saccade-specific. Further evidence for this account is presented from two experiments where participants judged the size of displacements on a continuous scale in saccade and mask conditions, with and without blanking. Saccades and masks both reduced the proportion of correctly perceived displacements and increased the proportion of missed displacements. Blanking improved performance in both conditions by reducing the proportion of missed displacements. Thus, if suppression of displacement reflects a bias for stability, it is not a saccade-specific bias, but a more general stability assumption revealed under conditions of impoverished vision. Specifically, I discuss the potentially decisive role of motion or other transient signals for displacement perception. Without transients or motion, the quality of relative position signals is poor, and saccadic and mask-induced suppression of displacement reflects performance when the decision has to be made on these signals alone. Blanking may improve those position signals by providing a transient onset or a longer time to encode the pre-saccadic target position.

scholarly journals The Role of Ocular Muscle Proprioception During Modifications in Smooth Pursuit Output

1997 ◽  
Vol 37 (6) ◽  
pp. 769-774 ◽  
Author(s):  
PAUL van DONKELAAR ◽  
GABRIEL M GAUTHIER ◽  
JEAN BLOUIN ◽  
JEAN-LOUIS VERCHER
Keyword(s):  
Smooth Pursuit ◽  
Muscle Proprioception ◽  
Ocular Muscle

Role of the posterior parietal cortex in updating reaching movements to a visual target

10.1038/9219 ◽  
1999 ◽  
Vol 2 (6) ◽  
pp. 563-567 ◽  
Author(s):  
M. Desmurget ◽  
C. M. Epstein ◽  
R. S. Turner ◽  
C. Prablanc ◽  
G. E. Alexander ◽  
...  
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Visual Target ◽  
Reaching Movements ◽  
Posterior Parietal

The role of brachial muscle spindle signals in assignment of visual direction

1993 ◽  
Vol 70 (4) ◽  
pp. 1578-1584 ◽  
Author(s):  
P. DiZio ◽  
C. E. Lathan ◽  
J. R. Lackner
Keyword(s):  
Apparent Motion ◽  
Muscle Spindle ◽  
Target Location ◽  
Biceps Brachii ◽  
Visual Target ◽  
Visual Direction ◽  
Muscle Vibration ◽  
Illusory Motion ◽  
The Stability

1. In the oculobrachial illusion, a target light attached to the unseen stationary hand is perceived as moving and changing spatial position when illusory motion of the forearm is elicited by brachial muscle vibration. Our goal was to see whether we could induce apparent motion and displacement of two retinally fixed targets in opposite directions by the use of oculobrachial illusions. 2. We vibrated both biceps brachii, generating illusory movements of the two forearms in opposite directions, and measured any associated changes in perceived distance between target lights on the unseen stationary hands. The stability of visual fixation of one of the targets was also measured. 3. The seen distance between the stationary targets increased significantly when vibration induced an illusory increase in felt distance between the hands, both with binocular and monocular viewing. 4. Subjects maintained fixation accuracy equally well during vibration-induced illusory increases in visual target separation and in a no-vibration control condition. Fixation errors were not correlated with the extent or direction of illusory visual separation. 5. These findings indicate that brachial muscle spindle signals can contribute to an independent representation of felt target location in head-centric coordinates that can be interrelated with a visual representation of target location generated by retinal and oculomotor signals. 6. A model of how these representations are interrelated is proposed, and its relation to other intersensory interactions is discussed.

Electrophysiological correlates of detecting a visual target and detecting its absence: The role of feature dimensions

2010 ◽  
Vol 48 (11) ◽  
pp. 3365-3370 ◽  
Author(s):  
Elkan G. Akyürek ◽  
Angela Dinkelbach ◽  
Anna Schubö ◽  
Hermann J. Müller
Keyword(s):  
Visual Target

scholarly journals An Investigation in the Role of the Visual Target in Stabilometry.

2000 ◽  
Vol 59 (6) ◽  
pp. 568-573 ◽  
Author(s):  
Keiko Soma ◽  
Takanobu Kunihiro ◽  
Akio Yoshida
Keyword(s):  
Visual Target

scholarly journals Learning to search. The importance of eye movements in the decrease of response times during a visual choice reaction time task

2016 ◽  
Vol 9 (5) ◽  
Author(s):  
Aleksandra Kroll ◽  
Monika Mak ◽  
Jerzy Samochowiec
Keyword(s):  
Eye Movements ◽  
Reaction Time ◽  
Choice Reaction Time ◽  
Visual Target ◽  
Response Times ◽  
Reaction Times ◽  
Reaction Time Task ◽  
Visual Tasks ◽  
Target Searching

Reaction times are often used as an indicator of the efficiency of the processes in thecentral nervous system. While extensive research has been conducted on the possibleresponse time correlates, the role of eye movements in visual tasks is yet unclear. Here wereport data to support the role of eye movements during visual choice reaction time training.Participant performance, reaction times, and total session duration improved. Eyemovementsshowed expected changes in saccade amplitude and resulted in improvementin visual target searching.

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