Differing roles for the dominant and non-dominant hands in the hand laterality task

Choisdealbha, Áine Ní; Brady, Nuala; Maguinness, Corrina

doi:10.1007/s00221-011-2652-9

Cited by 77 publications

(61 citation statements)

References 21 publications

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“…The present work reported shorter RT for left hands, as opposed to some previous studies that reported an advantage in right hand recognition (Gentilucci et al, 1998b; Ionta and Blanke, 2009; Takeda et al, 2010; Ní Choisdealbha et al, 2011). A previous work has however reported that RT for left hands were shorter when participants responded with the right hand (Cocksworth and Punt, 2013).…”

Section: Discussioncontrasting

confidence: 91%

“…As a matter of fact, whatever the task, RH respond faster with their dominant hand while response times are less affected by the side of the response hand in LH (Rabbitt, 1978; Tzourio-Mazoyer et al, 2015). Two previous studies overcame this problem by including a response with the ipsilateral foot (Ní Choisdealbha et al, 2011) or an oral response (Ionta and Blanke, 2009). These works also reported faster responses for right hands in RH while LH exhibited no difference.…”

Section: Discussionmentioning

confidence: 99%

“…This hypothesis has been tested behaviorally in several works. Most of them reported that RH recognized faster a right hand than a left hand while no difference existed in LH (Gentilucci et al, 1998b; Ionta and Blanke, 2009; Ní Choisdealbha et al, 2011). At the brain level, one study dealing with explicit motor imagery has shown that LH and RH exhibited different patterns of activation in the precentral, central and post-central regions (Willems et al, 2009), but to our knowledge, no neuroimaging study has compared LH and RH during HLT.…”

Section: Introductionmentioning

confidence: 99%

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Cortical Asymmetries during Hand Laterality Task Vary with Hand Laterality: A fMRI Study in 295 Participants

Mellet

Mazoyer

Leroux

et al. 2016

Front. Hum. Neurosci.

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The aim of this study was to characterize, using fMRI, the functional asymmetries of hand laterality task (HLT) in a sample of 295 participants balanced for handedness. During HLT, participants have to decide whether the displayed picture of a hand represent a right or a left hand. Pictures of hands’ back view were presented for 150 ms in the right or left hemifield. At the whole hemisphere level, we evidenced that the laterality of the hand and of the hemifield in which the picture was displayed combined their effects on the hemispheric asymmetry in an additive way. We then identified a set of 17 functional homotopic regions of interest (hROIs) including premotor, motor, somatosensory and parietal regions, whose activity and asymmetry varied with the laterality of the presented hands. When the laterality of a right hand had to be evaluated, these areas showed stronger leftward asymmetry, the hROI located in the primary motor area showing a significant larger effect than all other hROIs. In addition a subset of six parietal regions involved in visuo-motor integration together with two postcentral areas showed a variation in asymmetry with hemifield of presentation. Finally, while handedness had no effect at the hemispheric level, two regions located in the parietal operculum and intraparietal sulcus exhibited larger leftward asymmetry with right handedness independently of the hand of presentation. The present results extend those of previous works in showing a shift of asymmetries during HLT according to the hand presented in sensorimotor areas including primary motor cortex. This shift was not affected by manual preference. They also demonstrate that the coordination of visual information and handedness identification of hands relied on the coexistence of contralateral motor and visual representations in the superior parietal lobe and the postcentral gyrus.

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Section: Discussioncontrasting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cortical Asymmetries during Hand Laterality Task Vary with Hand Laterality: A fMRI Study in 295 Participants

Mellet

Mazoyer

Leroux

et al. 2016

Front. Hum. Neurosci.

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“…How this applies to interpreting action based on other people’s movements that are typically in the third person perspective is still unclear. Mentally simulated actions from an egocentric perspective are considered visually and motorically familiar (Ni Choisdealbha et al, 2011; Conson et al, 2012) as this affords optimization of motor imagery and action encoding. Alternatively, the allocentric perspective may not be motorically familiar to oneself, and in order to process allocentric action, motor imagery may necessitate visual transformations.…”

Section: Introductionmentioning

confidence: 99%

Differential mechanisms of action understanding in left and right-handed subjects: the role of perspective and handedness

Kelly¹

2013

Front. Psychol.

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The ability to comprehend outcomes of skilled action is important for understanding the world around us. Prior studies have evaluated the perspective an action is performed in, but few have evaluated how handedness of the actor and the observer interact with action perspective. Understanding handedness affords the opportunity to identify the role of mirroring and matched limb action encoding, which may display unique strategies of action understanding. Right and left-handed subjects were presented with images of tools from egocentric or allocentric perspectives performing movements by either a left or right hand. Subjects had to judge the outcome of the task, and accuracy and latency were evaluated. Our hypothesis was that both left and right-handed subjects would predict action best from an egocentric perspective. In allocentric perspectives, identification of action outcomes would occur best in the mirror-matched dominant limb for all subjects. Results showed there was a significant effect on accuracy and latency with respect to perspective for both right and left-handed subjects. The highest accuracies and fastest latencies were found in the egocentric perspective. Handedness of subject also showed an effect on accuracy, where right-handed subjects were significantly more accurate in the task than left-handed subjects. An interaction effect revealed that left-handed subjects were less accurate at judging images from an allocentric viewpoint compared to all other conditions. These findings suggest that action outcomes are best facilitated in an internal perspective, regardless of the hand being used. The decreased accuracy for left-handed subjects on allocentric images could be due to asymmetrical lateralization of encoding action and motoric dominance, which may interfere with translating allocentric limb action outcomes. Further neurophysiological studies will help us understand the specific processes of how left and right-handed subjects may encode actions.

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“…For this purpose, we adopted a paradigm, i.e. body posture manipulation, which has been widely used in motor imagery literature to demonstrate that mental imagery of actions strongly relies on information currently available from one's own body (Conson et al 2016;de Lange et al 2006;Funk et al 2005;Ni Choisdealbha et al 2011). Several studies demonstrated that body posture manipulation (i.e.…”

Section: Methodsmentioning

confidence: 99%

Mental simulation of drawing actions enhances delayed recall of a complex figure

et al. 2016

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Motor simulation implies that the same motor representations involved in action execution are re-enacted during observation or imagery of actions. Neurofunctional data suggested that observation of letters or abstract paintings can elicit simulation of writing or drawing gestures. We performed four behavioural experiments on right-handed healthy participants to test whether observation of a static and complex geometrical figure implies re-enactment of drawing actions. In Experiment 1, participants had to observe the stimulus without explicit instruction (observation-only condition), while performing irrelevant finger tapping (motor dual task), or while articulating irrelevant verbal material (verbal dual task). Delayed drawing of the stimulus was less accurate in the motor dual-task (interfering with simulation of hand actions) than in verbal dual-task and observation-only conditions. In Experiment 2, delayed drawing in the observation only was as accurate as when participants encoded the stimulus by copying it; in both conditions, accuracy was higher than when participants were instructed to observe the stimulus to recall it later verbally (observe to recall), thus being discouraged from engaging motor simulation. In Experiment 3, delayed drawing was as accurate in the observation-only condition as when participants imagined copying the stimulus; accuracy in both conditions was higher than in the observe-to-recall condition. In Experiment 4, in the observe-only condition participants who observed the stimulus with their right arm hidden behind their back were significantly less accurate than participants who had their left arm hidden. These findings converge in suggesting that mere observation of a geometrical stimulus can activate motor simulation and re-enactment of drawing actions.

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Differing roles for the dominant and non-dominant hands in the hand laterality task

Cited by 77 publications

References 21 publications

Cortical Asymmetries during Hand Laterality Task Vary with Hand Laterality: A fMRI Study in 295 Participants

Cortical Asymmetries during Hand Laterality Task Vary with Hand Laterality: A fMRI Study in 295 Participants

Differential mechanisms of action understanding in left and right-handed subjects: the role of perspective and handedness

Mental simulation of drawing actions enhances delayed recall of a complex figure

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