Deficit Fields for Stroke Recovery
Error-enhanced Learning & Recovery in 2 & 3 Dimensions
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Tipo de estudio
Tipo de estudio
Inscripción (Actual)
Inscripción
Fase
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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Illinois
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Chicago, Illinois, Estados Unidos, 60611
- Rehabilitation Institute of Chicago
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Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
Inclusion Criteria:
STROKE SURVIVORS:
- adult (age >18)
- Chronic stage stroke recovery (8+ months post)
- available medical records and radiographic information about lesion locations
- strokes caused by an ischemic infarct in the middle cerebral artery
- primary motor cortex involvement
- a Fugl-Meyer score (between 15-50) to evaluate arm motor impairment level
HEALTHY CONTROL PARTICIPANTS:
- adult (age >18)
- healthy individuals with no history of stroke or neural injury
Exclusion Criteria:
- bilateral paresis;
- severe sensory deficits in the limb
- severe spasticity (Modified Ashworth of 4) preventing movement
- aphasia, cognitive impairment or affective dysfunction that would influence the ability to perform the experiment
- inability to provide an informed consent
- severe current medical problems
- diffuse/multiple lesion sites or multiple stroke events
- hemispatial neglect or visual field cut that would prevent subjects from seeing the targets.
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Tratamiento
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Doble
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
|---|---|
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Experimental: Deficit-fields to reduce error
We hypothesize that a deficit-field design, using the statistics of a patient's errors to customize training, will provide optimal augmentation that varies during motion as needed.
We will compare the training effects of error deficit-fields with previous methods of error augmentation to improve reaching ability.
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Stroke survivors exhibit error in both reaching extent and abnormal curvatures of motion.
Prior error augmentation techniques multiply error by a constant at each instant during movement.
However, magnification of spurious errors may provoke over-compensation.
We hypothesize that a deficit-field design, using the statistics of a patient's errors to customize training, will provide optimal augmentation that varies during motion as needed.
We will compare the training effects of error deficit-fields with previous methods of error augmentation to improve reaching ability.
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Experimental: Deficit-fields to expand range of motion
Amplifying augmentation can expand motor exploration and improve skill retention in patients.
Using motor exploration patterns from each patient, we will form customized deficit-fields to recover normal joint workspace.
We will compare augmentation training that either amplifies or diminishes the observed deficits (Expt-1).
We also compare deficit-fields with our prior augmentation methods to determine the added value of increased customization (Expt-2).
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Motor deficits manifest in the workspace limitations of joints, i.e. reduced range of motion, uneven extension-flexion, inter-joint coupling, and unwanted synergies.
Our work builds upon these ideas by augmenting self-directed movement for training coordination.
We found that amplifying augmentation can expand motor exploration and improve skill retention in patients.
Using motor exploration patterns from each patient, we will form customized deficit-fields to recover normal joint workspace.
We will compare augmentation training that either amplifies or diminishes the observed deficits (Expt-1).
We also compare deficit-fields with our prior augmentation methods to determine the added value of increased customization (Expt-2).
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Experimental: Deficit-fields to improve function
Here we present visual distortion of whole body movement during manual tasks during standing, including reaching, grasping, and object manipulation.
We compare the training effects of feedback based on deficit-fields versus practice with normal vision.
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Clinicians have recognized the benefits of training on everyday tasks (Hubbard, Parsons et al. 2009), as well as practice with whole-body actions (Boehme 1988; Bohannon 1995).
However, typical robotic systems have only a single contact point and cannot drive the multiple joints involved in functional tasks.
Visual distortions (e.g. a shift, rotation or stretch) can promote adaptation even without forces.
Here we present visual distortion of whole body movement during manual tasks during standing, including reaching, grasping, and object manipulation.
We compare the training effects of feedback based on deficit-fields versus practice with normal vision.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Arm motor recovery scores on the Fugl-Meyer
Periodo de tiempo: Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Change from baseline in arm motor recovery as measured by Fugl-Meyer
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Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Medidas de resultado secundarias
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Number of blocks transferred in Box and Blocks Test
Periodo de tiempo: Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Change from baseline in number of blocks transferred during Box and Blocks Test
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Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Modified Ashworth Scale (MAS)
Periodo de tiempo: Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Change from baseline in amount of spasticity in elbow flexors and extensors
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Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Elbow active range of motion (ROM)
Periodo de tiempo: Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Change from baseline measured in degrees for elbow flexion and extension
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Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Chedoke McMaster Stroke Assessment for Hand
Periodo de tiempo: Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Change in baseline in amount of hand motor recovery as measured by Chedoke scale
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Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Time and completion score for Action Research Arm Test (ARAT)
Periodo de tiempo: Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Change in baseline score and time for completion of functional measures as part of ARAT
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Baseline at beginning of week 1 and 3 prior to intervention; post-evaluation at end of week 4; follow-up evaluation at end of week 5
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Investigadores
Investigadores
- Investigador principal: James L Patton, PhD, Shirley Ryan Abilitylab
Publicaciones y enlaces útiles
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Inicio del estudio
Finalización primaria (Actual)
Finalización primaria
Finalización del estudio (Actual)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
Otros números de identificación del estudio
- RehabilitationIC
- 2R01NS053606-05A1 (Subvención/contrato del NIH de EE. UU.)
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