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@misc{cogprints7314, volume = {1}, number = {2}, month = {April}, author = {Int J Cur Bio Med Sci. Simran Grewal, Vidushi Gupta}, title = {Effect of obesity on autonomic nervous system}, publisher = {CurrentSciDirect Publications}, year = {2011}, journal = {Int J Cur Bio Med Sci. }, pages = {15--18}, keywords = {autonomic functions tests, autonomic nervous system, Body mass index, cold pressor test, obesity, valsalva manoeuver}, url = {http://cogprints.org/7314/}, abstract = {The present study was carried out on 100 volunteers of which 50 subjects with BMI {\ensuremath{>}} 30kg/m2 were included in study group and 50 subjects with BMI {\ensuremath{<}} 30kg/m2 (non obese) were included in control group. The functioning of Autonomic nervous system was evaluated by six non-invasive tests- four of which were based mainly on parasympathetic control (30:15 ratio, standing to lying ratio (S/L ratio), expiration/inspiration ratio (E/I ratio) and valsalva maneuver) and two on sympathetic control (Blood pressure response to standing and cold pressor test). The results of the present study showed significantly low (p=0.001) S/L ratio in study group (1.04 {$\pm$} 0.12) when compared to controls (1.12 {$\pm$} 0.11) indicating impaired parasympathetic function. The mean change in sytolic blood pressure before and after cold pressor test (CPT) was less in study group (7.12 {$\pm$} 5.28) as compared to control group (10.38 {$\pm$} 6.35) and this was statistically significant (p=0.006) indicating impaired sympatheitc function. Thus ,in obese both division of ANS are affected which may be the cause of various cardiovascular complications.} }