Healthy humans are able to place light and heavy objects in small and large target locations with remarkable accuracy. Here we examine how dexterity demand and physical demand affect flexibility in joint coordination and end-effector kinematics when healthy young adults perform an upper extremity reaching task. We manipulated dexterity demand by changing target size and physical demand by incre...

The dexterity of a manipulator with passive joints, also known as an underactuated manipulator, differs from the dexterity of a fully actuated one, even if their mechanical structures are identical. Therefore, for fault tolerance and energy saving purposes, it is important to study the dexterity of underactuated manipulators. The purpose of this work is to quantify the dexterity of underactuate...

purpose: the first step to manage motor impairment of upper limb in patients with subacute stroke is having an accurate assessment tool. the fugl-meyer assessment of upper extremity and 9-hole pegboard test are used to evaluate motor function and hand dexterity in stroke survivals. the present study aimed to investigate the test-retest reliability and minimal detectable change (mdc) in these tw...

BACKGROUND Long-term motor outcome of acute stroke patients with severe motor impairment is difficult to predict. While measure of corticospinal tract (CST) injury based on diffusion tensor imaging (DTI) in subacute stroke patients strongly predicts motor outcome, its predictive value in acute stroke patients is unclear. Using a new DTI-based, density-weighted CST template approach, we demonstr...

An efficient method for utilising a two-dimensional camera to recognise hand gestures in three-dimensional space is described. The work is presented within the context of a recuperation aid for younger children with impaired movement of the upper limbs. The application is designed for use on a standard Android tablet device in the home, as part of an interactive storybook, so the algorithms are...

In the scientific literature, there is much evidence of a relationship between age and dexterity, where increased age is related to slower, less nimble and less smooth, less coordinated and less controlled performances. While some suggest that the relationship is a direct consequence of reduced muscle strength associated to increased age, there is a lack of research that has systematically inve...

objectives: stroke, is one of the major causes of disability in adults. so, the patient may prefer to use the non-involved limb to perfom selfcare & named this phenomen learned non used. constraint induced therapy is one of the rehabilitative interventions that can be effective in restoration of the function of the involved limb in some hemiparetic post stroke patients. purpose of this study wa...

BACKGROUND AND PURPOSE Ischemic stroke is the leading cause of upper extremity motor impairments. Although several well-characterized experimental stroke models exist, modeling of upper extremity motor impairments, which are unique to primates, is not well established. Cortical representation of dexterous movements in nonhuman primates is functionally and topographically similar to that in huma...

It has become increasingly recognized that the major functional deficits following brain damage are largely due to "negative' features such as weakness and loss of dexterity rather than spasticity. A variety of studies suggest that spasticity is a distinct problem and separate from the loss of dexterity, but that it may be implicated in the formation of muscle contracture and even in the recove...