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Deshpande, D V
- Reaction Time in Television Watching School Children
Authors
1 Professor, S.S. Institute of Medical Sciences & Research Centre, Davangere, Karnataka
2 Post Graduate Student, Department of Paediatrics, Basaveshwara Medical College Hospital and Research Centre, Chitradurga, Karnataka
3 Prof & Head, Department of Physiology, S.S. Institute of Medical Sciences & Research Centre, Davangere, Karnataka
Source
International Journal of Physiology, Vol 1, No 2 (2013), Pagination: 51-53Abstract
Study was done to find out whether Auditory and Visual reaction time (ART, VRT) is affected in school children who watch television (TV) daily. 56 school children of both gender aged between 10- 14 years were included and informed consent was obtained. Children watching TV for less than 1 hour per day were taken as controls and those watching for more than 2 hours per day were included in study group. Daily hours of physical activity, academic performances were enquired. ART and VRT was measured using Portable Reaction Time Response Apparatus supplied by Inco Instrumentation. Student t test was applied for two groups to find out significant difference. VRT was significant with p value = 0.008. Hours of daily TV watching was significant with p value= 0.000. Academic performance was significant for boys with p value= 0.033. Physical activity was significantly affected in study group with p value = 0.004. VRT was prolonged in children watching TV for more than 2 hours. TV watching causes memory and concentration problems leading to decreased academic performance, replaces activities like sports, outdoor games which are essential for growing children.Keywords
School Children Television Watching Auditory Reaction Time Visual Reaction Time Academic Performance Physical ActivityReferences
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- QTc Interval: Gender Difference and effect of Menstrual Cycle
Authors
1 Community Medicine Dept, SSIMS& RC, Davangere, Karnataka
Source
International Journal of Physiology, Vol 1, No 2 (2013), Pagination: 91-96Abstract
Context: Women are more predisposed to ventricular arrhythmias than men. The occurrence of Torsades-de-pointes is increased with the degree of QT interval prolongation, and female gender is a known risk factor for its occurrence. Drug induced QT prolongation are greater in women than in men. Sex hormones have potential role on the mechanisms involved in the cardiac repolarization
Aims: To note gender difference and menstrual cycle effect on cardiac electrophysiology
Settings and Design: Case-control study
Method and Material: Electrocardiogram (ECG) was recorded in randomly selected healthy 51 men and 51 women; aged between 17-20 yrs. ECG in women was taken during menstrual, proliferative and luteal phases of menstrual cycle. Basal body temperature throughout menstrual cycle was recorded in women to confirm that recordings were done in respective 3 phases of menstrual cycle. RR interval, QT interval and QTc interval were noted from Lead II recording of the subjects.
Statistical analysis used: Student's unpaired T test, Repeated measures ANOVA
Results: Study group was age matched. There was statistically highly significant gender difference during menstrual phase (p<0.001) and proliferative phase (p<0.001), and significant difference during secretory phase (p=0.008). Difference in mean QTc interval in women during different phases of menstrual cycle is statistically not significant (p=0.08).
Conclusions: There is gender difference in QTc interval of cardiac repolarization. There is no statistically significant difference in QTc interval in women during different phases of menstrual cycle. This difference is higher during menstrual phase in women
Keywords
QTc Interval, Gender Difference, Menstrual Cycle, Cardiac Repolarization, ECGReferences
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