scholarly journals Voluntary Actions Modulate Perception and Neural Representation of Action-Consequences in a Hand-Dependent Manner

2020 ◽  
Vol 30 (12) ◽  
pp. 6097-6107
Author(s):  
Batel Buaron ◽  
Daniel Reznik ◽  
Ro'ee Gilron ◽  
Roy Mukamel
Keyword(s):  
Visual Field ◽  
Motor System ◽  
Voluntary Movement ◽  
External Source ◽  
Neural Representation ◽  
Dependent Manner ◽  
Sensory Stimuli ◽  
Left Hand ◽  
Functional Laterality ◽  
The Right

Abstract Evoked neural activity in sensory regions and perception of sensory stimuli are modulated when the stimuli are the consequence of voluntary movement, as opposed to an external source. It has been suggested that such modulations are due to motor commands that are sent to relevant sensory regions during voluntary movement. However, given the anatomical-functional laterality bias of the motor system, it is plausible that the pattern of such behavioral and neural modulations will also exhibit a similar bias, depending on the effector triggering the stimulus (e.g., right/left hand). Here, we examined this issue in the visual domain using behavioral and neural measures (fMRI). Healthy participants judged the relative brightness of identical visual stimuli that were either self-triggered (using right/left hand button presses), or triggered by the computer. Stimuli were presented either in the right or left visual field. Despite identical physical properties of the visual consequences, we found stronger perceptual modulations when the triggering hand was ipsi- (rather than contra-) lateral to the stimulated visual field. Additionally, fMRI responses in visual cortices differentiated between stimuli triggered by right/left hand. Our findings support a model in which voluntary actions induce sensory modulations that follow the anatomical-functional bias of the motor system.

scholarly journals Voluntary actions modulate perception and neural representation of action-consequences in a hand-dependent manner

2020 ◽  
Author(s):  
Buaron B. ◽  
Reznik D. ◽  
Gilron R. ◽  
Mukamel R.
Keyword(s):  
Visual Field ◽  
Motor System ◽  
Voluntary Movement ◽  
Motor Command ◽  
External Source ◽  
Neural Representation ◽  
Dependent Manner ◽  
Sensory Stimuli ◽  
Left Hand ◽  
Functional Laterality

AbstractEvoked neural activity in sensory regions, and perception of sensory stimuli, are modulated when the stimuli are the consequence of voluntary movement as opposed to an external source. It has been suggested that such modulations are due to efference copies of the motor command that are sent to relevant sensory regions during voluntary movement. Given the anatomical-functional laterality bias of the motor system, it is plausible that the pattern of such behavioral and neural sensory modulations will exhibit a similar bias, depending on the effector that was used to trigger the stimulus (e.g. right / left hand). Here we examined this issue in the visual domain using behavioral and neural measures (fMRI). Healthy participants judged the relative brightness of identical visual stimuli that were either self-triggered (using right or left hand button presses), or triggered by the computer. By presenting stimuli to either the right or left visual field, we biased visual-evoked responses to left / right visual cortex. We found stronger perceptual modulations when the triggering hand was ipsi (rather than contra) lateral to the stimulated visual field. At the neural level, we found that despite identical physical properties of the visual consequence, evoked fMRI responses in right and left visual cortices differentiate the identity of the triggering hand (left / right). Our findings support a model in which voluntary actions induce sensory modulations that follow the anatomical-functional bias of the motor system.

scholarly journals Rapid feedback corrections during a bimanual postural task

2013 ◽  
Vol 109 (1) ◽  
pp. 147-161 ◽  
Author(s):  
Mohsen Omrani ◽  
Jörn Diedrichsen ◽  
Stephen H. Scott
Keyword(s):  
Sensory Feedback ◽  
Specific Information ◽  
Spatial Average ◽  
Electromyographic Activity ◽  
Dependent Manner ◽  
Left Hand ◽  
Motor Physiology ◽  
The One ◽  
The Right ◽  
Online Feedback

An important observation in motor physiology is that even the fastest feedback responses can be modified in a task-dependent manner. However, whether or not such responses in one limb can be modulated based on online sensory feedback from other limbs is still unknown. We tested this using a bimanual postural control task, in which the two hands either controlled two separate cursors (double-cursor task) or a single cursor displayed at the spatial average between the hands (single-cursor task). In the first experiment, the two hands were symmetrically perturbed outwards. In the double-cursor task, the participants therefore had to return their hands to the targets, whereas in the single-cursor task no correction was necessary. Within 50 ms, the electromyographic activity showed significantly smaller responses in the single- compared with the double-cursor task. In the second experiment, the perturbation direction of the left hand (inward/outward) was randomized, such that participants could not preplan their response before perturbation onset. Results show that the behavior of the right arm in the one-cursor task depended on online feedback coming from the left arm: the muscular response was modulated within 75 ms based on directionally specific information of the left arm. These results suggest that sensory feedback from one limb can quickly modify the perturbation response of another limb in a task-dependent manner.

Influence of Heartbeat on Voluntary Movement

1987 ◽  
Vol 65 (3) ◽  
pp. 875-878 ◽  
Author(s):  
Yozo Miyaoka ◽  
Seisaku Sato ◽  
Yoshihiro Takahashi ◽  
Kyuhachiro Shimada
Keyword(s):  
Voluntary Movement ◽  
Phase Relationship ◽  
Left Hand ◽  
Random Manner ◽  
The Right ◽  
Electrocardiogram Ecg

The phase relationship between heartbeat and self-paced voluntary movement was evaluated on a key-tapping task while recording an electrocardiogram (ECG). The task was performed by either a rhythmic or a random manner with either the right or the left hand. The frequency of key-tapping movements was most just after the R-peak of the ECG in all conditions and decreased with increasing the interval from the R-peak in the left-hand conditions. The results suggest that the key-tapping movement might be paced by afferent signals arising from heartbeat.

scholarly journals Interlimb Transfer of Grasp Orientation is Asymmetrical

2006 ◽  
Vol 6 ◽  
pp. 1805-1809 ◽  
Author(s):  
Victor Frak ◽  
D. Bourbonnais ◽  
I. Croteau ◽  
H. Cohen
Keyword(s):  
Motor System ◽  
Hemispheric Asymmetry ◽  
Hand Preference ◽  
Hemispheric Dominance ◽  
Hand Movements ◽  
Left Hand ◽  
Contact Points ◽  
Contralateral Hand ◽  
Human Motor ◽  
The Right

One the most fundamental aspects of the human motor system is the hemispheric asymmetry seen in behavioral specialization. Hemispheric dominance can be inferred by a contralateral hand preference in grasping. Few studies have considered grasp orientation in the context of manual lateralization and none has looked at grasp orientation with natural prehension. Thirty right-handed adults performed precision grasps of a cylinder using the thumb and index fingers, and the opposition axis (OA) was defined as the line connecting these two contact points on the cylinder. Subjects made ten consecutive grasps with one hand (primary hand movements) followed by ten grasps with the other hand (trailing movements). Differences between primary and trailing grasps revealed that each hemisphere is capable of programming the orientation of the OA and that primary movements with the right hand significantly influenced OA orientation of the trailing left hand. These results extend the hemispheric dominance of the left hemisphere to the final positions of fingers during prehension.

scholarly journals A modality selective effect of functional laterality in pain detection sensitivity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Huijuan Zhang ◽  
Xuejing Lu ◽  
Yanzhi Bi ◽  
Li Hu
Keyword(s):  
Environmental Changes ◽  
Sensory Modality ◽  
Detection Sensitivity ◽  
Superior Performance ◽  
Dominant Hand ◽  
Sensory Stimuli ◽  
Functional Laterality ◽  
Reaction Functions ◽  
Significant Difference ◽  
The Right

AbstractThe ability to detect environmental changes is essential to determine the appropriate reaction when facing potential threats. Both detection and reaction functions are critical to survival, and the superior performance of motor reaction for the dominant hand is well recognized in humans. However, it is not clear whether there exists laterality in sensitivity to detect external changes and whether the possible laterality is associated with sensory modality and stimulus intensity. Here, we tested whether the perceptual sensitivity and electrophysiological responses elicited by graded sensory stimuli (i.e., nociceptive somatosensory, non-nociceptive somatosensory, auditory, and visual) that were delivered on/near the left and right hands would be different for right-handed individuals. We observed that perceived intensities and most brain responses were significantly larger when nociceptive stimuli were delivered to the left side (i.e., the non-dominant hand) than to the right side (i.e., the dominant hand). No significant difference was observed between the two sides for other modalities. The higher sensitivity to detect nociceptive stimuli for the non-dominant hand would be important to provide a prompt reaction to noxious events, thus compensating for its worse motor performance. This laterality phenomenon should be considered when designing experiments for pain laboratory studies and evaluating regional sensory abnormalities for pain patients.

Stimulus-Response Compatibility and the Motor System

1982 ◽  
Vol 34 (3) ◽  
pp. 367-380 ◽  
Author(s):  
David W. Bauer ◽  
Jeff Miller
Keyword(s):  
Motor System ◽  
Stimulus Array ◽  
Response Compatibility ◽  
Left Hand ◽  
Stimulus Response ◽  
Right Hand ◽  
Stimulus Response Compatibility ◽  
The Right ◽  
Reverse Mapping

Three experiments examined stimulus-response (S—R) compatibility relationships with the stimulus array perpendicular to the response array. In Experiments I and II, stimuli indicated right and left positions, while the responses were movements up and down. The mapping right/up and left/down was preferable for the right hand, but the reverse mapping was preferable for the left hand. In Experiment III, the stimuli indicated up and down positions, while the responses were movements to the right and left. In this case, the mapping up/left and down/right was preferable for the right hand, and the reverse mapping was preferable for the left hand. The results are most easily explained by assuming that counterclockwise rotational movements are preferable for the right hand, while clockwise is preferable for the left. These preferences are manifest through combinations of implicit movements towards the stimulus and explicit movements towards the response key. This principle is shown to provide a simpler explanation for some previously reported S-R compatibility effects.

Hemispheric Asymmetry in Reaction Time to Color Stimuli

1977 ◽  
Vol 45 (3_suppl) ◽  
pp. 1151-1155 ◽  
Author(s):  
M. Pirot ◽  
T. W. Pulton ◽  
L. W. Sutker
Keyword(s):  
Reaction Time ◽  
Visual Field ◽  
Left Visual Field ◽  
Hemispheric Asymmetry ◽  
Visual Fields ◽  
Left Hand ◽  
Simple Detection ◽  
Color Field ◽  
The Right ◽  
Male Subjects

The simple detection of colored stimuli in the right, center, and left visual fields was examined. 10 male subjects were used in a reaction time paradigm with color (red, green, or blue), field, and hand as independent variables. A significantly faster RT to stimuli presented in the left visual field was observed, and further the left visual field-left hand combination was the fastest of all the combinations of visual-field × hand. A significant interaction of color × field suggested that red may be processed on a higher order level even in a simple detection task.

Editorial Note

1946 ◽  
Vol 11 (1) ◽  
pp. 2-2
Keyword(s):  
Editorial Note ◽  
Speech Sounds ◽  
Left Hand ◽  
Hand Column ◽  
Right Hand ◽  
Infant Speech ◽  
The Right

In the article “Infant Speech Sounds and Intelligence” by Orvis C. Irwin and Han Piao Chen, in the December 1945 issue of the Journal, the paragraph which begins at the bottom of the left hand column on page 295 should have been placed immediately below the first paragraph at the top of the right hand column on page 296. To the authors we express our sincere apologies.

Is the Future the Right Time?

2010 ◽  
Vol 57 (4) ◽  
pp. 308-314 ◽  
Author(s):  
Marc Ouellet ◽  
Julio Santiago ◽  
Ziv Israeli ◽  
Shai Gabay
Keyword(s):  
Auditory Task ◽  
English Speakers ◽  
Visual Modality ◽  
Opposite Pattern ◽  
Time Line ◽  
Temporal Reference ◽  
Left Hand ◽  
Reading Direction ◽  
Mental Time Line ◽  
The Right

Spanish and English speakers tend to conceptualize time as running from left to right along a mental line. Previous research suggests that this representational strategy arises from the participants’ exposure to a left-to-right writing system. However, direct evidence supporting this assertion suffers from several limitations and relies only on the visual modality. This study subjected to a direct test the reading hypothesis using an auditory task. Participants from two groups (Spanish and Hebrew) differing in the directionality of their orthographic system had to discriminate temporal reference (past or future) of verbs and adverbs (referring to either past or future) auditorily presented to either the left or right ear by pressing a left or a right key. Spanish participants were faster responding to past words with the left hand and to future words with the right hand, whereas Hebrew participants showed the opposite pattern. Our results demonstrate that the left-right mapping of time is not restricted to the visual modality and that the direction of reading accounts for the preferred directionality of the mental time line. These results are discussed in the context of a possible mechanism underlying the effects of reading direction on highly abstract conceptual representations.

Visual asymmetries during face encoding Increased dwell time and fixations in the upper and left hemifields

2018 ◽  
Author(s):  
Fatima Maria Felisberti
Keyword(s):  
Face Recognition ◽  
Eye Movements ◽  
Visual Field ◽  
Face Processing ◽  
Dwell Time ◽  
The Other ◽  
Environmental Cues ◽  
Reading Habits ◽  
The Right

Visual field asymmetries (VFA) in the encoding of groups rather than individual faces has been rarely investigated. Here, eye movements (dwell time (DT) and fixations (Fix)) were recorded during the encoding of three groups of four faces tagged with cheating, cooperative, or neutral behaviours. Faces in each of the three groups were placed in the upper left (UL), upper right (UR), lower left (LL), or lower right (LR) quadrants. Face recognition was equally high in the three groups. In contrast, the proportion of DT and Fix were higher for faces in the left than the right hemifield and in the upper rather than the lower hemifield. The overall time spent looking at the UL was higher than in the other quadrants. The findings are relevant to the understanding of VFA in face processing, especially groups of faces, and might be linked to environmental cues and/or reading habits.

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