The measurement of visual reaction time has been used to evaluate the processing speed of Central Nervous System and the coordination between the sensory and motor systems. Reaction time is influenced by different factors. Effect of gender difference on visual reaction time has been observed in this study. Present study was carried out on 100 medical students of Bhavnagar medical college between the age of 17-20. Out of them 50 were boys and 50 were girls. Study was done under three module. In first module detail medical history of subject were taken, in second module visual reaction time of subjects was measured using reaction time instrument and in third module statical analysis was done by unpaired 't' test. From study it was concluded that reaction time is less in boys than girls.

Abstract:Aim of this study is to study effect of smoking on various spirometric parameters like forced vital capacity (FVC) , forced expiratory volume in 1 second (FEV 1 ) and FEV 1 / FVC ratio in apparently healthy tobacco smokers and nonsmokers and to compare the result of both the studies to assess the effects of smoking. The present study was carried out by computerized software of Pulmonary Function Test named 'Spiro Excel' on 50 non-smokers and 50 smokers. Smokers are divided in three gropus. Full series of test take 4 to 5 minutes. Tests were compared in the both smokers and non-smokers group by the 'unpaired t test'. Statistical significance was indicated by 'p' value < 0.05. From the result it is found that actual value of spirometric parameters are significantly lower in all smokers group than non-smokers.Key Words: Effect of smoking, forced vital capacity , forced expiratory flow rate in 1 second, FEV 1 / FVC ratio