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OBJECTIVE It was our primary objective to provide evidence supporting the existence of neural detectors for postural instability that could trigger the compensatory adjustments to avoid falls. METHODS Twelve young healthy subjects performed self-initiated oscillatory and discrete postural movements in the anterior-posterior (AP) directions with maximal(More)
OBJECTIVE To assess gait in patients with autism. DESIGN Clinical and physiologic assessment. SETTING Research hospital. PATIENTS AND SUBJECTS Five adults with autism and five healthy, age-matched control subjects. MAIN OUTCOME MEASURE(S) Clinical and biomechanical assessment. RESULTS Clinical assessment showed mild clumsiness in four patients and(More)
In standing humans, it is not certain whether anticipatory postural adjustments associated with rapid, voluntary elbow flexion movements (focal movements) originate as a selection from preset synergies or as the result of specific planning of motor commands. We studied these muscle recruitment patterns when the same focal movement was made under behavioral(More)
OBJECTIVE To investigate retest reliability and concurrent validity of the fundamental measurements made of a posturographic protocol that employs quiet standing to quantify the severity and the nature of patients' postural disturbances. STUDY DESIGN Retrospective complete block design. SETTING Geriatric rehabilitation department. PARTICIPANTS(More)
BACKGROUND The ability to redirect the path of the foot during walking is critical for responding to perturbations and maintaining upright stability. The purpose of the current study was to compare mechanisms of reactive stepping adjustments in young versus older adults when responding to an unexpected perturbation during voluntary step initiation. (More)
We hypothesized that defining joint power (JP) merely on the basis of joint rotations ignores important translational power terms, and may not adequately represent the energy flow profile for a given muscle group. A novel six degree-of-freedom (6 DOF) model of the ankle complex was implemented, accounting for previously ignored joint translations as well as(More)
OBJECTIVES To investigate the relationships between the severity of flexed posture (FP), skeletal fragility, and functional status level in elderly women. DESIGN Cross-sectional study. SETTING Geriatric rehabilitation research hospital. PARTICIPANTS Sixty elderly women (aged 70-93) with FP referred to a geriatric rehabilitation department for chronic(More)
OBJECTIVES To explore the association between an individual's functional status, movement task difficulty, and effectiveness of compensatory movement strategies within a sit-to-stand (STS) paradigm. DESIGN Cross-sectional study. SETTINGS Rehabilitation unit of the Istituto Nazionale Riposo e Cura Anziani Geriatric Hospital of Florence, Italy. (More)
OBJECTIVE To determine whether Adaptive Physical Activity (APA-stroke), a community-based exercise program for participants with hemiparetic stroke, improves function in the community. METHODS Nonrandomized controlled study in Tuscany, Italy, of participants with mild to moderate hemiparesis at least 9 months after stroke. Forty-nine participants in a(More)
OBJECTIVE To test the suitability of using biomechanic measures associated with a minimum measured input model (MMIM) approach to assess mobility of people with chronic stroke during the execution of a sit-to-stand (STS) to upright posture motor task. DESIGN Single group, observational. SETTING Institutional settings in the United States and Italy. (More)