نتایج جستجو برای: motor recovery
تعداد نتایج: 353195 فیلتر نتایج به سال:
The afferent input following stroke has an important role in motor relearning. The purpose of this study is to describe the relationship between upper limb clinical motor function and the status of the afferent system among chronic stroke survivors. Twenty-four chronic stroke survivors participated in the study. Clinical motor function of the paretic arm was assessed with the upper extremity po...
While motor recovery following mild stroke has been extensively studied with neuroimaging, mechanisms of recovery after moderate to severe strokes of the types that are often the focus for novel restorative therapies remain obscure. We used fMRI to: 1) characterize reorganization occurring after moderate to severe subacute stroke, 2) identify brain regions associated with motor recovery and 3) ...
Rehabilitation-dependent motor recovery after cerebral ischemia is associated with functional reorganization of residual cortical tissue. Recovery is thought to occur when remaining circuitry surrounding the lesion is "retrained" to assume some of the lost function. This reorganization is in turn supported by synaptic plasticity within cortical circuitry and manipulations that promote plasticit...
Tracking and predicting motor outcomes is important in determining effective stroke rehabilitation strategies. Diffusion tensor imaging (DTI) allows for evaluation of the underlying structural integrity of brain white matter tracts and may serve as a potential biomarker for tracking and predicting motor recovery. In this study, we examined the longitudinal relationship between DTI measures of t...
Stroke may trigger a number of cellular and molecular events in perilesional and remote brain regions enabling cortical reorganization and recovery of function. We here investigated the pattern and time course of acute stroke-induced changes in motor system activity during motor recovery using functional magnetic resonance imaging. Hand movement-related neural activity was assessed in 11 acute ...
OBJECTIVE Afferent input is proposed to mediate its effect on motor functions by modulating the excitability of the motor cortex. We aimed to clarify - in a longitudinal study - how afferent input affects motor cortex excitability after stroke and how it is associated with recovery of hand function. METHODS The motor cortex excitability was studied by measuring the reactivity of the motor cor...
BACKGROUND AND PURPOSE The early prognostic application of transcranial magnetic brain stimulation (TMS) for assessing motor and functional recovery in ischemic stroke patients has yielded contradictory results. We performed a prospective study of patients with acute ischemic stroke and motor deficit to evaluate the early prognostic value of TMS in motor and functional recovery. METHODS Fifty...
An experimental lesion in the primary motor or sensory cortices in monkeys leads to functional reorganization in areas surrounding the lesion or in contralateral homologous regions. In humans, task-dependent brain activation after motor stroke seems to be multifocal and bilateral. Although many active structures are seen after stroke, their roles are unclear. For instance, the uninjured primary...
The question of how intensive motor training restores motor function after brain damage or stroke remains unresolved. Here we show that the ipsilesional ventral premotor cortex (PMv) and perilesional primary motor cortex (M1) of rhesus macaque monkeys are involved in the recovery of manual dexterity after a lesion of M1. A focal lesion of the hand digit area in M1 was made by means of ibotenic ...
BACKGROUND AND PURPOSE This study examined the validity of the clinical tenet that poststroke recovery of the upper extremity is less rapid and complete than poststroke recovery of the lower extremity. Previous studies comparing upper and lower extremity recovery have evaluated disability rather than motor impairment. Individuals with lower extremity impairments may be more functional and appea...
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