scholarly journals Motor‐imagery ability and function of hemiplegic upper limb in stroke patients

2019 ◽  
Vol 6 (3) ◽  
pp. 596-604 ◽  
Author(s):  
Shu Morioka ◽  
Michihiro Osumi ◽  
Yuki Nishi ◽  
Tomoya Ishigaki ◽  
Rintaro Ishibashi ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Upper Limb ◽  
Imagery Ability ◽  
Stroke Patients ◽  
And Function

What are the determinants of explicit and implicit motor imagery ability in stroke patients?: a controlled study

2020 ◽  
Vol 37 (2) ◽  
pp. 84-91
Author(s):  
Esma Nur Kolbaşı ◽  
Burcu Ersoz Huseyinsinoglu ◽  
Hacı Ali Erdoğan ◽  
Murat Çabalar ◽  
Nurgül Bulut ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Controlled Study ◽  
Imagery Ability ◽  
Stroke Patients ◽  
Implicit Motor

scholarly journals The Influence of Primary Motor Cortex Inhibition on Upper Limb Impairment and Function in Chronic Stroke: A Multimodal Study

2019 ◽  
Vol 33 (2) ◽  
pp. 130-140 ◽  
Author(s):  
Ronan A. Mooney ◽  
Suzanne J. Ackerley ◽  
Deshan K. Rajeswaran ◽  
John Cirillo ◽  
P. Alan Barber ◽  
...  
Keyword(s):  
Motor Cortex ◽  
Upper Limb ◽  
Primary Motor Cortex ◽  
Motor Impairment ◽  
Intracortical Inhibition ◽  
Chronic Stroke ◽  
Stroke Patients ◽  
Gaba Concentration ◽  
Chronic Stage ◽  
And Function

Background. Stroke is a leading cause of adult disability owing largely to motor impairment and loss of function. After stroke, there may be abnormalities in γ-aminobutyric acid (GABA)-mediated inhibitory function within primary motor cortex (M1), which may have implications for residual motor impairment and the potential for functional improvements at the chronic stage. Objective. To quantify GABA neurotransmission and concentration within ipsilesional and contralesional M1 and determine if they relate to upper limb impairment and function at the chronic stage of stroke. Methods. Twelve chronic stroke patients and 16 age-similar controls were recruited for the study. Upper limb impairment and function were assessed with the Fugl-Meyer Upper Extremity Scale and Action Research Arm Test. Threshold tracking paired-pulse transcranial magnetic stimulation protocols were used to examine short- and long-interval intracortical inhibition and late cortical disinhibition. Magnetic resonance spectroscopy was used to evaluate GABA concentration. Results. Short-interval intracortical inhibition was similar between patients and controls ( P = .10). Long-interval intracortical inhibition was greater in ipsilesional M1 compared with controls ( P < .001). Patients who did not exhibit late cortical disinhibition in ipsilesional M1 were those with greater upper limb impairment and worse function ( P = .002 and P = .017). GABA concentration was lower within ipsilesional ( P = .009) and contralesional ( P = .021) M1 compared with controls, resulting in an elevated excitation-inhibition ratio for patients. Conclusion. These findings indicate that ipsilesional and contralesional M1 GABAergic inhibition are altered in this small cohort of chronic stroke patients. Further study is warranted to determine how M1 inhibitory networks might be targeted to improve motor function.

scholarly journals Brain Activation in Primary Motor and Somatosensory Cortices during Motor Imagery Correlates with Motor Imagery Ability in Stroke Patients

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
Linda Confalonieri ◽  
Giuseppe Pagnoni ◽  
Lawrence W. Barsalou ◽  
Justin Rajendra ◽  
Simon B. Eickhoff ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Brain Activity ◽  
Premotor Cortex ◽  
Region Of Interest ◽  
Wave Force ◽  
Sine Wave ◽  
Lower Percentage ◽  
Imagery Ability ◽  
Motor Execution ◽  
Stroke Patients

Aims. While studies on healthy subjects have shown a partial overlap between the motor execution and motor imagery neural circuits, few have investigated brain activity during motor imagery in stroke patients with hemiparesis. This work is aimed at examining similarities between motor imagery and execution in a group of stroke patients. Materials and Methods. Eleven patients were asked to perform a visuomotor tracking task by either physically or mentally tracking a sine wave force target using their thumb and index finger during fMRI scanning. MIQ-RS questionnaire has been administered. Results and Conclusion. Whole-brain analyses confirmed shared neural substrates between motor imagery and motor execution in bilateral premotor cortex, SMA, and in the contralesional inferior parietal lobule. Additional region of interest-based analyses revealed a negative correlation between kinaesthetic imagery ability and percentage BOLD change in areas 4p and 3a; higher imagery ability was associated with negative and lower percentage BOLD change in primary sensorimotor areas during motor imagery.

scholarly journals A cutlery set for stroke

2021 ◽  
Author(s):  
◽  
Lin Chen
Keyword(s):  
Assistive Technology ◽  
Upper Limb ◽  
Stroke Patient ◽  
The United States ◽  
Stroke Severity ◽  
Muscle Control ◽  
Stroke Patients ◽  
Muscle Contracture ◽  
And Function

<p>Stroke is a common problem that affects approximately 700,000 patients annually in the United States alone and can cause long-term disabilities (Mallory, 2006, p.33). The long-term effects of a stroke can impact on the patient’s ability to use one side of their body. Upper limb, lower limb, postural and communication difficulties are common factors that patients experience after a stroke (Perry, 2004), which can affect the patient’s ability to eat (McLaren, 1997).  After a stroke, the impairment of an upper limb can lead to problems that make it difficult for people to use cutlery, and include poor grip, decreased muscle control, tremors and upper limb weakness (Brackenrige, 2016). Currently, there are some assistive technology (AT) cutlery sets aimed to help patients who have difficulty in eating and muscle control. Several reasons why stroke patients abandon AT cutlery are cost, appearance, and function (Vaes, 2014). However, an experiment (Torrens, 2013) in to adaptive cutlery products and previous research suggest that there is a large space to improve this, such as appearance and function.  AT cutlery sets have been criticized because of their appearance and inferior functions (Torrens, 2013). This then leads to a disconnection between the user and the AT cutlery products, in which the user experiences visible stigma and links the cutlery to an undesirable characteristic (Vaes, 2012). There are some limitations of the current AT cutlery sets that have been identified in the evaluation (Torren & Smith, 2013), such as poor friction material, stereotypical shapes, and skin-tone handle colour. The limitations create an opportunity for the designers to improve the AT cutlery set to be a selected object and a pleasurable product to use in everyday life.  The purpose of this research is to explore how human-centred design can reduce the stigma of using AT cutlery for stroke patients through addressing the appearance and interactions of spoons, forks and knives. The research involves the following steps: observing videos of stroke patients eating, interviewing clinicians, interviewing stroke patients, and iterative design with the supervision of clinicians.  Some of the main issues identified surrounding stroke patient eating and using cutlery include grip weakness, muscle contracture, and difficulty of flexion. Based on the product intervention model for stigma (PIMS) (Vaes, 2014), this study utilized existing research surrounding the evaluation of assistive technology. To help understand each stage of the user needs, previous feedback from health-care clinicians and patients will ensure the validity of ergonomic interventions and stigma strategy as a substitute for traditional cutlery design.  The output of this research includes a set of cutlery as well as assistive components. The design addresses a patient’s difficulty in using cutlery through an adaptive ring to help the patients’ grip. The utensils allow the user to either carry out eating activities at home or in a restaurant.  The feedback from occupational therapists and physiotherapists indicates that the cutlery should accommodate different levels of stroke severity. Based on the findings of literature reviews and feedback, I have focused my design on addressing the stroke patients’ grip weakness, muscle contracture, and difficulty of hand flexion, whilst minimizing stigma, based on the PIMS strategies (Vaes, 2014). The design principle suggests that current cutlery designs with an integrated shape cannot meet all requirements of a stroke patient. Therefore, a combination of additional wearing components needs to be used to help dietary intake.</p>

scholarly journals A cutlery set for stroke

2021 ◽  
Author(s):  
◽  
Lin Chen
Keyword(s):  
Assistive Technology ◽  
Upper Limb ◽  
Stroke Patient ◽  
The United States ◽  
Stroke Severity ◽  
Muscle Control ◽  
Stroke Patients ◽  
Muscle Contracture ◽  
And Function

<p>Stroke is a common problem that affects approximately 700,000 patients annually in the United States alone and can cause long-term disabilities (Mallory, 2006, p.33). The long-term effects of a stroke can impact on the patient’s ability to use one side of their body. Upper limb, lower limb, postural and communication difficulties are common factors that patients experience after a stroke (Perry, 2004), which can affect the patient’s ability to eat (McLaren, 1997).  After a stroke, the impairment of an upper limb can lead to problems that make it difficult for people to use cutlery, and include poor grip, decreased muscle control, tremors and upper limb weakness (Brackenrige, 2016). Currently, there are some assistive technology (AT) cutlery sets aimed to help patients who have difficulty in eating and muscle control. Several reasons why stroke patients abandon AT cutlery are cost, appearance, and function (Vaes, 2014). However, an experiment (Torrens, 2013) in to adaptive cutlery products and previous research suggest that there is a large space to improve this, such as appearance and function.  AT cutlery sets have been criticized because of their appearance and inferior functions (Torrens, 2013). This then leads to a disconnection between the user and the AT cutlery products, in which the user experiences visible stigma and links the cutlery to an undesirable characteristic (Vaes, 2012). There are some limitations of the current AT cutlery sets that have been identified in the evaluation (Torren & Smith, 2013), such as poor friction material, stereotypical shapes, and skin-tone handle colour. The limitations create an opportunity for the designers to improve the AT cutlery set to be a selected object and a pleasurable product to use in everyday life.  The purpose of this research is to explore how human-centred design can reduce the stigma of using AT cutlery for stroke patients through addressing the appearance and interactions of spoons, forks and knives. The research involves the following steps: observing videos of stroke patients eating, interviewing clinicians, interviewing stroke patients, and iterative design with the supervision of clinicians.  Some of the main issues identified surrounding stroke patient eating and using cutlery include grip weakness, muscle contracture, and difficulty of flexion. Based on the product intervention model for stigma (PIMS) (Vaes, 2014), this study utilized existing research surrounding the evaluation of assistive technology. To help understand each stage of the user needs, previous feedback from health-care clinicians and patients will ensure the validity of ergonomic interventions and stigma strategy as a substitute for traditional cutlery design.  The output of this research includes a set of cutlery as well as assistive components. The design addresses a patient’s difficulty in using cutlery through an adaptive ring to help the patients’ grip. The utensils allow the user to either carry out eating activities at home or in a restaurant.  The feedback from occupational therapists and physiotherapists indicates that the cutlery should accommodate different levels of stroke severity. Based on the findings of literature reviews and feedback, I have focused my design on addressing the stroke patients’ grip weakness, muscle contracture, and difficulty of hand flexion, whilst minimizing stigma, based on the PIMS strategies (Vaes, 2014). The design principle suggests that current cutlery designs with an integrated shape cannot meet all requirements of a stroke patient. Therefore, a combination of additional wearing components needs to be used to help dietary intake.</p>

scholarly journals Recovery of Motor Imagery Ability in Stroke Patients

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Sjoerd de Vries ◽  
Marga Tepper ◽  
Bert Otten ◽  
Theo Mulder
Keyword(s):  
Motor Imagery ◽  
Mental Imagery ◽  
Hand Function ◽  
Mental Practice ◽  
Imagery Ability ◽  
Stroke Patients ◽  
Motor Functioning ◽  
Rehabilitation Process ◽  
Implicit Motor ◽  
The Relationship

Objective. To investigate whether motor imagery ability recovers in stroke patients and to see what the relationship is between different types of imagery and motor functioning after stroke.Methods. 12 unilateral stroke patients were measured at 3 and 6 weeks poststroke on 3 mental imagery tasks. Arm-hand function was evaluated using the Utrecht Arm-Hand task and the Brunnström Fugl-Meyer Scale. Age-matched healthy individuals (N=10) were included as controls.Results. Implicit motor imagery ability and visual motor imagery ability improved significantly at 6 weeks compared to 3 weeks poststroke.Conclusion. Our study shows that motor imagery can recover in the first weeks after stroke. This indicates that a group of patients who might not be initially selected for mental practice can, still later in the rehabilitation process, participate in mental practice programs. Moreover, our study shows that mental imagery modalities can be differently affected in individual patients and over time.

scholarly journals Motor imagery ability in stroke patients: the relationship between implicit and explicit motor imagery measures

2013 ◽  
Vol 7 ◽  
Author(s):  
Sjoerd de Vries ◽  
Marga Tepper ◽  
Wya Feenstra ◽  
Hanneke Oosterveld ◽  
Anne M. Boonstra ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Imagery Ability ◽  
Stroke Patients ◽  
Implicit And Explicit ◽  
The Relationship
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