[ effect of microwave on micronucleus induction and nuclear division index changes on Balb/c mice lymphocytes

Biological effects of microwave radiation on living creatures have been the focus of many investigations over the last decade and the influence of different wave parameters such as frequency, power, exposure time, and modulation has been elucidated. The main purpose of the present study was to investigate the effect of microwave radiation on alterations of micronucleus induction and nuclear divisions index under different conditions. A total of 48 Balb/c mice divided in eight groups [7 as cases and 1 as control] were exposed to microwave generator while restrained in specially designed Plexiglas chamber. Later, the frequency of micronucleus in binucleated lymphocytes and NDI was evaluated using micronucleus assay on mouse lymphocytes. Microwave radiation conditions [frequency, power, modulation and exposure time] showed no significant effect on frequency of micronucleus, however, the nuclear division index was significantly decreased under such conditions. Based on data found in our study, the microwave radiation as we used during the present work, caused significant effect on nuclear division index in mouse lymphocytes

[ effect of strengthening exercises on biomechanical parameters of gait in chronic hemiparesis following stroke]

Stroke is a major cause of death and disability in all societies and the disability resulting from stroke most commonly presents as hemiplegic or hemi paresis. To determine the biomechanical impairments of gait in hemi paretic patients and also to evaluate the effects of functional, balance and strengthening exercises [FBS] protocol on treatment of these impairments. This clinical trial was performed in Kahrizak Charity Foundation in 2003. Thirty-four hemi paretic patients were assigned randomly as either an experimental group or a control group, and their gaits were assessed using gait part of functional, balance and strength scale[FBSS] before and after 12 sessions of intervention. The experimental group received FBS protocol and the control group was delivered with the same protocol but strengthening exercises. The data were analyzed using independent and paired t-tests, Mann-Whitney and Wilcox on test. In experimental group, the measure of gait patterns increased from 25.8 to 36.8, velocity from 27.65 to 39.8 m/min and stride length from 67.9 to 90.1 cm [P0.0001]. In control group measure of gait patterns increased from 18.8 to 22.2, stride length from 42 to45.7cm [P0.0001] and velocity from 15.6 to 16.4 m/min [P=0.002]. In experimental group, the cadence changed from 82.8 to 88.5 [P=0.1 13] and in control group from 71.6 to 69.8 stepper minute [P=0.157]. The mean differences of gait patterns - i.e. velocity and stride length between two groups were statistically significant [P0.0001], however the mean difference of cadence was not significant. The results of this study support the effectiveness of muscle strength training to improve gait patterns, velocity and stride length in the chronic stage of rehabilitation following stroke