Objectives To find out the effect of exteroceptive and proprioceptive stimuli on H reflex latency and on excitability of nerve and to compare these effects with different exteroceptive and proprioceptive stimuli., Method and Procedure: A sample of 30 normal healthy female subjects with age group between 19–25 years participated in study. Each subject was given different exteroceptive (Hot Pack, Cold Pack) and proprioceptive (Quick Stretch, Weight bearing) stimuli. For each stimuli pre and post readings were taken for H reflex latency and amplitude of H/M which suggests excitability of nerve. The effects were then analyzed for each stimulus and compared.,Results & Conclusion: There was significant increase in the H reflex latency with cold pack and weight bearing. H/M ratio decreased with cold pack, quick stretch and weight bearing. On comparing the effect of different stimulus there was significant change in the latency with cold pack and hot pack and in the H/M between cold pack and hot pack and weight bearing. Thus with this study we can say that there is change in the latency of H reflex and on the excitability of nerve with different exteroceptive and proprioceptive stimuli.

Key Words: H- reflex latency, Excitability of nerve (H/M), Exteroceptive stimulus, Proprioceptive stimulus.