Short Term Motor-Skill Acquisition Improves with Size of Self-Controlled Virtual Hands

Ossmy, Ori; Mukamel, Roy

doi:10.1371/journal.pone.0168520

Cited by 16 publications

(9 citation statements)

References 44 publications

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“…The intensity of the training seems important in this context as well; a previous study reported delayed gains in performance only once individual saturation within the initial training sessions had been achieved 45 . It has also been documented that feedback guidance helps to optimise motor performance and motor learning of jaw muscles 35,46,47 . It should be noted here that our study's oral motor task was quite demanding, requiring a high degree of oral sensorimotor control.…”

Section: Discussionmentioning

confidence: 67%

Motor learning might contribute to a therapeutic anterior shift of the habitual mandibular position—An exploratory study

Glöggler

Hellmann

Manstein

et al. 2021

J of Oral Rehabilitation

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Background Passive mandibular advancement with functional appliances is commonly used to treat juvenile patients with mandibular retrognathism. Objective The aim of this study was to investigate whether active repetitive training of the mandible into an anterior position would result in a shift of the habitual mandibular position (HMP). Methods Twenty adult healthy subjects were randomly assigned to one of two groups: a training group receiving six supervised functional training sessions of 10 min each and a control group without training. Bonded lateral biteplates disengaged occlusion among both groups throughout the 15‐day experiment. Customised registration‐training appliances consisted of a maxillary component with an anterior plane and a mandibular component with an attached metal sphere. Training sessions consisted of repeated mouth‐opening/closing cycles (frequency: 30/min) to hit an anteriorly positioned hemispherical target notch with this metal sphere. The HMP was registered at defined times during the experiment. Results The HMP in the training group showed a statistically significant anterior shift of 1.6 mm (interquartile range [IQR]: 1.2 mm), compared with a significant posterior shift of −0.8 mm (IQR: 2.8 mm) in the control group (p < .05). Although the anterior shift among the training group showed a partial relapse 4 days after the first training block, it then advanced slightly in the 4‐day interval after the second training block, which might indicate neuroplasticity of the masticatory motor system. Conclusions Motor learning by repetitive training of the mandible into an anterior position might help to improve the results of functional appliance therapy among patients with mandibular retrognathism.

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Section: Discussionmentioning

confidence: 67%

Motor learning might contribute to a therapeutic anterior shift of the habitual mandibular position—An exploratory study

Glöggler

Hellmann

Manstein

et al. 2021

J of Oral Rehabilitation

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“…Moreover, left hand performance gain correlated with the neural activity during training (Ossmy and Mukamel, 2016 ). Thus, altering online visual feedback (for instance in terms of involved effector, its size, or movement pace) can boost motor performance and modulate cortical activity (Senna et al, 2015 ; Ossmy and Mukamel, 2016 , 2017a , b ). Similarly, in our study we found that online concurrent visual feedback improved performance.…”

Section: Discussionmentioning

confidence: 99%

Superimposed Skilled Performance in a Virtual Mirror Improves Motor Performance and Cognitive Representation of a Full Body Motor Action

Hülsmann

Frank

Senna³

et al. 2019

Front. Robot. AI

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Feedback is essential for skill acquisition as it helps identifying and correcting performance errors. Nowadays, Virtual Reality can be used as a tool to guide motor learning, and to provide innovative types of augmented feedback that exceed real world opportunities. Concurrent feedback has shown to be especially beneficial for novices. Moreover, watching skilled performances helps novices to acquire a motor skill, and this effect depends on the perspective taken by the observer. To date, however, the impact of watching one's own performance together with full body superimposition of a skilled performance, either from the front or from the side, remains to be explored. Here we used an immersive, state-of-the-art, low-latency cave automatic virtual environment (CAVE), and we asked novices to perform squat movements in front of a virtual mirror. Participants were assigned to one of three concurrent visual feedback groups: participants either watched their own avatar performing full body movements or were presented with the movement of a skilled individual superimposed on their own performance during movement execution, either from a frontal or from a side view. Motor performance and cognitive representation were measured in order to track changes in movement quality as well as motor memory across time. Consistent with our hypotheses, results showed an advantage of the groups that observed their own avatar performing the squat together with the superimposed skilled performance for some of the investigated parameters, depending on perspective. Specifically, for the deepest point of the squat, participants watching the squat from the front adapted their height, while those watching from the side adapted their backward movement. In a control experiment, we ruled out the possibility that the observed improvements were due to the mere fact of performing the squat movements—irrespective of the type of visual feedback. The present findings indicate that it can be beneficial for novices to watch themselves together with a skilled performance during execution, and that improvement depends on the perspective chosen.

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“…Here we extended the standard MVF approach by using visual feedback in a VR environment, which allows feedback to be controlled by software. Future studies using this environment can introduce various perturbations (in time and space, such as temporal delays or size changes in virtual hands 39 ) to find optimal parameters for efficient rehabilitation.…”

Section: Discussionmentioning

confidence: 99%

Motor learning by cross education in Hemi-Parkinson’s disease: Case study of the effects of virtual mirrored sensory feedback

Ossmy¹,

Mansano²,

Frenkel‐Toledo³

et al. 2019

Preprint

Self Cite

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Cross education is a phenomenon in which motor training of one hand induces motor learning in the other hand. We have recently shown in healthy subjects that the effect of cross-education is significantly augmented by provision of real-time manipulated bi-modal (visual and kinesthetic) sensory feedback, creating an illusory sensation of voluntary training with the other hand. Here we tested whether this training method may be applicable also in pathological conditions affecting one side of the body. We present here data showing behavioral gain accompanied by functional magnetic resonance imaging dynamics following training with this setup in the case of patient LA, a young man with significant unilateral upper-limb dysfunction stemming from hemi-Parkinson’s disease. Following two weeks of daily sessions in which he intensively trained the non-affected upper limb, he showed improvement in motor capacity of the affected limb, accompanied by enhanced activation in the pre-frontal cortex and a widespread increase in functional coupling in the brain. Results from the current case study suggest that combining cross-education with manipulated sensory input may also have beneficial effects in clinical conditions.

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Short Term Motor-Skill Acquisition Improves with Size of Self-Controlled Virtual Hands

Cited by 16 publications

References 44 publications

Motor learning might contribute to a therapeutic anterior shift of the habitual mandibular position—An exploratory study

Motor learning might contribute to a therapeutic anterior shift of the habitual mandibular position—An exploratory study

Superimposed Skilled Performance in a Virtual Mirror Improves Motor Performance and Cognitive Representation of a Full Body Motor Action

Motor learning by cross education in Hemi-Parkinson’s disease: Case study of the effects of virtual mirrored sensory feedback

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