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Aim: To investigate the blood flow of vertebral artery at c1-c2 region during manual traction -Mulligan. Method: The focus of the present study is measuring haemodynamic parameters including peak systolic velocity (PSv) and end diastolic velocity (EDv) of vertebral arteries at the sub occipital region of cervical spine in neutral positioning and whether there is change in the hemodynamic parameters during c1-c2 manual traction (mulligan) using Doppler ultrasonography in normal individual mean age 24.68 + 2.03year. Results: The result showed significance difference (p=0.000) in blood flow velocity for PSv and EDv between neutral position and during manual traction for left and right vertebral arteries. Conclusion: This technique had no mechanical effect on vertebral artery rather it has an impact on hemodynamic status of artery and are of great value in increasing the knowledge of the possible treatment protocol related to the blood flow changes with the movements of cervical spine.

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