Prevention of disuse amyotrophy of lower extremities by exercises of isometric muscles contraction after inmobilized with plaster spica of hip / 中国康复理论与实践

@# ObjectiveTo observe effects of exercises of lower extremities isometric mucles contraction on disuse amyotrophy after inmobilized with plaster spica of hip .Methods47 cases inmobilized with plaster spica of hip were divided into the treatment group (37 cases) and control group (10 cases). Patients of the control group were treated regularly. Patients of the treatment group were taken exercises of lower extremity isometric muscles contraction gradually after stitches removing. When the plaster inmobilization was moved, the circumference of bilateral thigh and crus were measured. All data were analyzed with SPSS 10.0.ResultsThe disuse amyotrophy of patients of the treatment group was lighter than that of the control group.ConclusionLower extremities exercises of isometric muscles contractionIt can prevent disuse amyotrophy of patients inmobilized with plaster spica of hip .

Effect of Isometric Muscle Contraction on the Somatosensory Evoked Potentials

OBJECTIVE: To investigate the association of the muscle contraction with gating of the sensory input at central and peripheral levels according to the intensity of muscle contraction and location of the muscles, somatosensory evoked potentials (SSEPs) studies were evaluated at different levels of isometric contraction in the different muscles. METHOD: Median nerve SSEPs were recorded at Erb's point and scalp in the ten healthy adult subjects with isometric contraction of ipsilateral abductor pollicis brevis (APB), ipsilateral abductor digiti minimi (ADM) and contralateral APB. Median nerve SSEPs were recorded in each of these conditions during precontraction, weak contraction, strong contraction and 4 minutes after contraction. RESULTS: 1) N9 amplitudes of median SSEPs recorded at Erb's point were augumented during weak contraction and these amplitude augumentations were statistically significant in the ipsilateral APB contraction (p<0.05). 2) N20 amplitudes recorded at scalp were inhibited during strong isometric contraction and these amplitude inhibitions were statistically significant in the ipsilateral APB contraction (p<0.05). 3) The latencies of N9 and N20 potentials were not significantly changed during isometric contraction. CONCLUSION: Therefore peripheral nervous system as well as central nervous system is responsible for gating, so the subject should be asked for the best relaxation possible for higher reliability of SSEPs.