Biomedical subjects

Margarete DiBenedetto

Publications and source records attributed to Margarete DiBenedetto.

4 recordsLinked to original sources

PubMed2005

Effect of a gentle Iyengar yoga program on gait in the elderly: an exploratory study.

OBJECTIVE: To determine if a tailored yoga program could improve age-related changes in hip extension, stride length, and associated indices of gait function in healthy elders, changes that have been linked to increased risk for falls, dependency, and mortality in geriatric populations. DESIGN: Single group pre-post test exploratory study. A 3-dimensional quantitative gait evaluation, including kinematic and kinetic measurements, was performed pre- and postintervention. Changes over time (baseline to postintervention) in primary and secondary outcome variables were assessed using repeated-measures analysis of variance. SETTING: Yoga exercises were performed in an academic medical center (group classes) and in the subjects' homes (yoga home-practice assignments). Pre- and postassessments were performed in a gait laboratory. PARTICIPANTS: Twenty-three healthy adults (age range, 62-83 y) who were naive to yoga were recruited; 19 participants completed the program. INTERVENTION: An 8-week Iyengar Hatha yoga program specifically tailored to elderly persons and designed to improve lower-body strength and flexibility. Participants attended two 90-minute yoga classes per week, and were asked to complete at least 20 minutes of directed home practice on alternate days. MAIN OUTCOME MEASURES: Peak hip extension, average anterior pelvic tilt, and stride length at comfortable walking speed. RESULTS: Peak hip extension and stride length significantly increased (F1,18=15.44, P<.001; F1,18=5.57, P=.03, respectively). We also observed a trend toward reduced average pelvic tilt (F1,18=4.10, P=.06); adjusting for the modifying influence of frequency of home yoga practice strengthened the significance of this association (adjusted F1,17=14.30, P=.001). Both the frequency and duration of yoga home practice showed a strong, linear, dose-response relationship to changes in hip extension and average pelvic tilt. CONCLUSIONS: Findings of this exploratory study suggest that yoga practice may improve hip extension, increase stride length, and decrease anterior pelvic tilt in healthy elders, and that yoga programs tailored to elderly adults may offer a cost-effective means of preventing or reducing age-related changes in these indices of gait function.

Accidental Falls↗

PubMed2003

F-wave acquisition using low-current stimulation.

The purpose of this study was to assess the feasibility of utilizing low-current stimulation for F-wave generation, thereby avoiding the discomfort of repetitive supramaximal stimulation. We employed the same technique as is used for generating F waves in the conventional way, except for using a stimulating current that was just strong enough to evoke a motor response on the oscilloscope. This usually required a stimulus of about 10-15 mA at 0.2-ms duration. Both median nerves of 30 subjects were evaluated with this technique and with F waves generated by the conventional technique in the same subjects. Amplitudes were larger when using supramaximal current stimulation. However, there was no statistical difference between F-wave latencies, chronodispersion, and persistence (penetrance) elicited with maximal and low-current stimulation. This procedure should represent a significant improvement for patient comfort during electrodiagnostic procedures involving F-wave studies.

Adult↗

PubMed2002

Mixed median nerve forearm conduction velocity in the presence of focal compression neuropathy at the wrist versus peripheral neuropathy.

OBJECTIVES: To establish normal values for the conduction velocity of the mixed median nerve in the forearm, and to determine the use of mixed median nerve conduction velocity (NCV) studies across the forearm in the differential diagnosis of carpal tunnel syndrome (CTS), peripheral neuropathy, and CTS with peripheral neuropathy. DESIGN: Criterion standard. Mixed median NCV studies across the forearm were added to routine CTS investigational protocols. SETTING: University outpatient setting, rural referral base. PARTICIPANTS: Thirty healthy volunteers and 60 patients referred with symptoms and signs suggestive of CTS and/or peripheral neuropathy. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Motor sensory and mixed median nerve conduction velocity across the forearm. RESULTS: The mean mixed median NCV across the forearm was 64.5 m/s in healthy subjects and subjects with CTS. The mean mixed NCV in subjects with peripheral neuropathy was 54 m/s, even in the presence of CTS. CONCLUSION: Mixed median NCV in the forearm added to the standard protocols is helpful in differentiating the diagnosis of CTS from peripheral neuropathy and CTS with peripheral neuropathy.

Adult↗

PubMed2002

Foot evaluation by infrared imaging.

For better assessment of foot injury severity during basic military training, we evaluated a simple noninvasive technique: thermography. With this infrared imaging method, we determined normal foot parameters (from 30 soldiers before training), thermographic findings in different foot stress fractures (from 30 soldiers so diagnosed), and normal responses to abnormal stresses in 30 trainees who underwent the same training as the previous group but did not have musculoskeletal complaints. We found that normal foot thermograms show onion peel-like progressive cooling on the plantar surface, with a medially located warm center at the instep. Thermograms of injured feet show areas of increased heat, but excessive weight-bearing pressures on feet, new shoes, or boots also cause increased infrared emission even without discomfort. Differentiation remains difficult; however, thermography can detect injury early. It does not reveal exact diagnoses, but its greatest benefit is easy follow-up to monitor severity and healing.

Adolescent↗