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https://www.readbyqxmd.com/read/28610466/the-effect-of-practice-and-visual-feedback-on-oral-diadochokinetic-rates-for-younger-and-older-adults
#1
Boaz M Ben-David, Michal Icht
Assessments of oral-diadochokinetic rates are commonly performed to evaluate oral-motor skills. However, the appropriate administration protocol is not defined, and varies across therapists, clinics and laboratories. In three experiments and an auxiliary one, this study analyzes the effects of brief (motor) practice and visual feedback on the performance of 98 younger (20-40 years old) and 78 older adults (over 65) with the sequential motion rate (SMR) version. Overall rates were significantly faster for younger over older adults...
June 1, 2017: Language and Speech
https://www.readbyqxmd.com/read/28553218/the-effects-of-mirror-feedback-during-target-directed-movements-on-ipsilateral-corticospinal-excitability
#2
Mathew Yarossi, Thushini Manuweera, Sergei V Adamovich, Eugene Tunik
Mirror visual feedback (MVF) training is a promising technique to promote activation in the lesioned hemisphere following stroke, and aid recovery. However, current outcomes of MVF training are mixed, in part, due to variability in the task undertaken during MVF. The present study investigated the hypothesis that movements directed toward visual targets may enhance MVF modulation of motor cortex (M1) excitability ipsilateral to the trained hand compared to movements without visual targets. Ten healthy subjects participated in a 2 × 2 factorial design in which feedback (veridical, mirror) and presence of a visual target (target present, target absent) for a right index-finger flexion task were systematically manipulated in a virtual environment...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28463270/tracking-background-oriented-schlieren-for-observing-shock-oscillations-of-transonic-flying-objects
#3
Tomohiro Sueishi, Masato Ishii, Masatoshi Ishikawa
A detailed understanding of the in-flight behavior of high-speed flying objects is useful in the forensic investigation of crime scenes. In particular, for transonic flying objects with associated unsteady shock waves, long-duration and high-resolution measurements are desirable but difficult with conventional optical visualization methods. In this study, we propose a tracking background-oriented schlieren (BOS) method that uses a mirror-based high-speed optical axis controller and a striped retroreflective background...
May 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28356472/task-dependent-vestibular-feedback-responses-in-reaching
#4
Johannes Keyser, W Pieter Medendorp, Luc P J Selen
When reaching for an earth-fixed object during self-rotation, the motor system should appropriately integrate vestibular signals and sensory predictions to compensate for the intervening motion and its induced inertial forces. While it is well established that this integration occurs rapidly, it is unknown if vestibular feedback is processed dependent on the behavioral goal. Here, we studied whether vestibular signals evoke fixed responses with the aim to preserve the hand trajectory in space or are processed more flexibly, correcting trajectories only in task-relevant spatial dimensions...
March 29, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28344546/choosing-muse-validation-of-a-low-cost-portable-eeg-system-for-erp-research
#5
Olave E Krigolson, Chad C Williams, Angela Norton, Cameron D Hassall, Francisco L Colino
In recent years there has been an increase in the number of portable low-cost electroencephalographic (EEG) systems available to researchers. However, to date the validation of the use of low-cost EEG systems has focused on continuous recording of EEG data and/or the replication of large system EEG setups reliant on event-markers to afford examination of event-related brain potentials (ERP). Here, we demonstrate that it is possible to conduct ERP research without being reliant on event markers using a portable MUSE EEG system and a single computer...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28315946/changing-the-size-of-a-mirror-reflected-hand-moderates-the-experience-of-embodiment-but-not-proprioceptive-drift-a-repeated-measures-study-on-healthy-human-participants
#6
Priscilla G Wittkopf, Donna M Lloyd, Mark I Johnson
Mirror visual feedback is used for reducing pain and visually distorting the size of the reflection may improve efficacy. The findings of studies investigating size distortion are inconsistent. The influence of the size of the reflected hand on embodiment of the mirror reflection is not known. The aim of this study was to compare the effect of magnifying and minifying mirror reflections of the hand on embodiment measured using an eight-item questionnaire and on proprioceptive drift. During the experiment, participants (n = 45) placed their right hand behind a mirror and their left hand in front of a mirror...
June 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28269584/virtual-reality-for-pediatric-neuro-rehabilitation-adaptive-visual-feedback-of-movement-to-engage-the-mirror-neuron-system
#7
Roopeswar Kommalapati, Konstantinos P Michmizos
Sensorimotor therapy gives optimal results when patients are cognitively engaged into highly repetitive tasks, a goal that most children find hard to pursue. This paper presents the key developments of our ongoing effort to design an interactive rehabilitation environment that motivates physically impaired children throughout their therapy. The continuous motivation is achieved by the system adapting fundamental therapeutic components to the performance of each child. The relevant movement is mirrored to an animated character projected in front of the child...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28243537/using-visuo-kinetic-virtual-reality-to-induce-illusory-spinal-movement-the-moovi-illusion
#8
Daniel S Harvie, Ross T Smith, Estin V Hunter, Miles G Davis, Michele Sterling, G Lorimer Moseley
BACKGROUND: Illusions that alter perception of the body provide novel opportunities to target brain-based contributions to problems such as persistent pain. One example of this, mirror therapy, uses vision to augment perceived movement of a painful limb to treat pain. Since mirrors can't be used to induce augmented neck or other spinal movement, we aimed to test whether such an illusion could be achieved using virtual reality, in advance of testing its potential therapeutic benefit. We hypothesised that perceived head rotation would depend on visually suggested movement...
2017: PeerJ
https://www.readbyqxmd.com/read/28240422/cerebellar-lobules-and-dentate-nuclei-mirror-cortical-force-related-bold-responses-beyond-all-linear-expectations
#9
Adnan A S Alahmadi, Matteo Pardini, Rebecca S Samson, Karl J Friston, Ahmed T Toosy, Egidio D'Angelo, Claudia A M Gandini Wheeler-Kingshott
The relationship between the BOLD response and an applied force was quantified in the cerebellum using a power grip task. To investigate whether the cerebellum responds in an on/off way to motor demands or contributes to motor responses in a parametric fashion, similarly to the cortex, five grip force levels were investigated under visual feedback. Functional MRI data were acquired in 13 healthy volunteers and their responses were analyzed using a cerebellum-optimized pipeline. This allowed us to evaluate, within the cerebellum, voxelwise linear and non-linear associations between cerebellar activations and forces...
May 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28227840/virtual-reality-for-pediatric-neuro-rehabilitation-adaptive-visual-feedback-of-movement-to-engage-the-mirror-neuron-system
#10
Roopeswar Kommalapati, Konstantinos P Michmizos, Roopeswar Kommalapati, Konstantinos P Michmizos, Roopeswar Kommalapati, Konstantinos P Michmizos
Sensorimotor therapy gives optimal results when patients are cognitively engaged into highly repetitive tasks, a goal that most children find hard to pursue. This paper presents the key developments of our ongoing effort to design an interactive rehabilitation environment that motivates physically impaired children throughout their therapy. The continuous motivation is achieved by the system adapting fundamental therapeutic components to the performance of each child. The relevant movement is mirrored to an animated character projected in front of the child...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28220070/neural-correlates-of-mirror-visual-feedback-induced-performance-improvements-a-resting-state-fmri-study
#11
Viola Rjosk, Jöran Lepsien, Elisabeth Kaminski, Maike Hoff, Bernhard Sehm, Christopher J Steele, Arno Villringer, Patrick Ragert
Mirror visual feedback (MVF) is a promising approach to enhance motor performance without training in healthy adults as well as in patients with focal brain lesions. There is preliminary evidence that a functional modulation within and between primary motor cortices as assessed with transcranial magnetic stimulation (TMS) might be one candidate mechanism mediating the observed behavioral effects. Recently, studies using task-based functional magnetic resonance imaging (fMRI) have indicated that MVF-induced functional changes might not be restricted to the primary motor cortex (M1) but also include higher order regions responsible for perceptual-motor coordination and visual attention...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28196765/visual-illusion-of-tool-use-recalibrates-tactile-perception
#12
Luke E Miller, Matthew R Longo, Ayse P Saygin
Brief use of a tool recalibrates multisensory representations of the user's body, a phenomenon called tool embodiment. Despite two decades of research, little is known about its boundary conditions. It has been widely argued that embodiment requires active tool use, suggesting a critical role for somatosensory and motor feedback. The present study used a visual illusion to cast doubt on this view. We used a mirror-based setup to induce a visual experience of tool use with an arm that was in fact stationary...
February 11, 2017: Cognition
https://www.readbyqxmd.com/read/28061429/the-not-so-strange-body-in-the-mirror-a-principal-components-analysis-of-direct-and-mirror-self-observation
#13
Paul M Jenkinson, Catherine Preston
In this study we adopted a psychometric approach to examine how the body is subjectively experienced in a mirror. One hundred and twenty-four healthy participants viewed their body for five minutes directly or via a mirror, and then completed a 20-item questionnaire designed to capture subjective experiences of the body. PCA revealed a two-component structure for both direct and mirror conditions, comprising body evaluations (and alienation) and unusual feelings and perceptions. The relationship between these components and pre-existing tendencies for appearance anxiety, body dysmorphic-type beliefs, dissociative symptomatology, self-objectification and delusion ideation further supported the similarity between direct and mirror conditions; however, the occurrence of strange experiences like those reported to occur during prolonged face viewing was not confirmed...
February 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/27994482/dysesthesia-symptoms-produced-by-sensorimotor-incongruence-in-healthy-volunteers-an-electroencephalogram-study
#14
Osamu Katayama, Michihiro Osumi, Takayuki Kodama, Shu Morioka
OBJECTIVES: Pathological pain such as phantom limb pain is caused by sensorimotor incongruence. Several studies with healthy participants have clearly indicated that dysesthesia, which is similar to pathological pain, is caused by incongruence between proprioception and/or motor intention and visual feedback. It is not clear to what extent dysesthesia may be caused by incongruence between motor intention and visual feedback or by incongruence between proprioception and visual feedback...
2016: Journal of Pain Research
https://www.readbyqxmd.com/read/27942154/systematic-review-of-the-effects-of-mirror-therapy-in-children-with-cerebral-palsy
#15
REVIEW
Eom-Ji Park, Soon-Hyung Baek, Soohee Park
[Purpose] To provide data for systematic intervention plans in occupational therapy practice by objectivity showing the value of mirror therapy interventions in children with cerebral palsy. [Subjects and Methods] Medline and EMBASE databases were searched for the key words "cerebral palsy," "mirror movement," "mirror therapy," and "mirror visual feedback." Nine studies that met the inclusion and exclusion criteria were identified. The qualitatively determined level of evidence, period of research, comparisons and interventions, tools used to measure the intervention, and the effects were analyzed...
November 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27920978/network-interactions-underlying-mirror-feedback-in-stroke-a-dynamic-causal-modeling-study
#16
Soha Saleh, Mathew Yarossi, Thushini Manuweera, Sergei Adamovich, Eugene Tunik
Mirror visual feedback (MVF) is potentially a powerful tool to facilitate recovery of disordered movement and stimulate activation of under-active brain areas due to stroke. The neural mechanisms underlying MVF have therefore been a focus of recent inquiry. Although it is known that sensorimotor areas can be activated via mirror feedback, the network interactions driving this effect remain unknown. The aim of the current study was to fill this gap by using dynamic causal modeling to test the interactions between regions in the frontal and parietal lobes that may be important for modulating the activation of the ipsilesional motor cortex during mirror visual feedback of unaffected hand movement in stroke patients...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27733826/use-of-a-structured-mirrors-intervention-does-not-reduce-delirium-incidence-but-may-improve-factual-memory-encoding-in-cardiac-surgical-icu-patients-aged-over-70-years-a-pilot-time-cluster-randomized-controlled-trial
#17
Kimberly Giraud, Megan Pontin, Linda D Sharples, Paul Fletcher, Tim Dalgleish, Allaina Eden, David P Jenkins, Alain Vuylsteke
Introduction: Post-operative delirium remains a significant problem, particularly in the older surgical patient. Previous evidence suggests that the provision of supplementary visual feedback about ones environment via the use of a mirror may positively impact on mental status and attention (core delirium diagnostic domains). We aimed to explore whether use of an evidence-based mirrors intervention could be effective in reducing delirium and improving post-operative outcomes such as factual memory encoding of the Intensive Care Unit (ICU) environment in older cardiac surgical patients...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27642526/mirror-visual-feedback-training-improves-intermanual-transfer-in-a-sport-specific-task-a-comparison-between-different-skill-levels
#18
Fabian Steinberg, Nils Henrik Pixa, Michael Doppelmayr
Mirror training therapy is a promising tool to initiate neural plasticity and facilitate the recovery process of motor skills after diseases such as stroke or hemiparesis by improving the intermanual transfer of fine motor skills in healthy people as well as in patients. This study evaluated whether these augmented performance improvements by mirror visual feedback (MVF) could be used for learning a sport-specific skill and if the effects are modulated by skill level. A sample of 39 young, healthy, and experienced basketball and handball players and 41 novices performed a stationary basketball dribble task at a mirror box in a standing position and received either MVF or direct feedback...
2016: Neural Plasticity
https://www.readbyqxmd.com/read/27636200/exploring-the-impact-of-visual-and-movement-based-priming-on-a-motor-intervention-in-the-acute-phase-post-stroke-in-persons-with-severe-hemiparesis-of-the-upper-extremity
#19
Jigna Patel, Qinyin Qiu, Mathew Yarossi, Alma Merians, Supriya Massood, Eugene Tunik, Sergei Adamovich, Gerard Fluet
PURPOSE: Explore the potential benefits of using priming methods prior to an active hand task in the acute phase post-stroke in persons with severe upper extremity hemiparesis. METHODS: Five individuals were trained using priming techniques including virtual reality (VR) based visual mirror feedback and contralaterally controlled passive movement strategies prior to training with an active pinch force modulation task. Clinical, kinetic, and neurophysiological measurements were taken pre and post the training period...
July 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/27633238/changes-in-glance-behaviour-when-using-a-visual-eco-driving-system-a-field-study
#20
Christer Ahlstrom, Katja Kircher
While in-vehicle eco-driving support systems have the potential to reduce greenhouse gas emissions and save fuel, they may also distract drivers, especially if the system makes use of a visual interface. The objective of this study is to investigate the visual behaviour of drivers interacting with such a system, implemented on a five-inch screen mounted above the middle console. Ten drivers participated in a real-world, on-road driving study where they drove a route nine times (2 pre-baseline drives, 5 treatment drives, 2 post-baseline drives)...
January 2017: Applied Ergonomics
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