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Background and Aims The nerves of the brachial plexus (musculocutaneous-MCN, median-MN ulnar-UN, and radial -RN) show significant topographic variation at the axilla . The study was aim to evaluate the use of dynamic ultrasound for identification of different nerves during axillary brachial plexus block with hypothesis that dynamic movement at the level of shoulder, elbow and wrist will lead to dynamic movement of nerves at axilla to ease identification of nerves for successful block compared to perineural technique.Methods This randomised controlled pilot study was conducted after approval of IRB .40 pts were divided into GROUP DY (Dynamic ultrasound ) – block was given after identify various arm and forearm movements which make muscle contraction with respective nerve supply of arm and forearm using six-point visibility, In GROUP NDY (perineural approach) – block was given by perineural techniqueResults The visibility of MCN was good at shoulder 900/elbow flexion position with mean score (4.11± 0.471) poor at shoulder 1800 position ( 3.11± 0.963) .The UN visibility was good during wrist flexion (3.11 ± 0.90) & poor in the shoulder 180° position, ( 2.28 ± 0.826) The RN visibility was good during supination, elbow extension and wrist extension ( 3.83 ± 0.383, 3.83±0.383 &3.78±0.428 )respectively poor in the shoulder 180° position, (2.78 ± 1.060 ). The visibility of MN was good at wrist flexion and pronation position (3.50± 0.786 and 3.44±0.784) respectively & poor at shoulder1800 position with mean score( 2.33± 0.840) The visibility of the musculocutaneous (MCN), median (MN), ulnar (UN), and radial (RN) nerves differs significantly across all eight upper limb movements with p = 0.000 , Time taken was significantly higher in group DY with p = 0.000.Sensory and motor block are comparable in both groupConclusions Identification of a nerve during dynamic USG may improves the effectiveness of the blocks.