who suggested that proprioceptive information is essential for the motor control system to select the appropriate motor strategy of reciprocal activation among the agonist and antagonist to efficiently balance. Significant difference was observed when comparing the post-treatment results of the two groups in favor of the study group II receiving suspension therapy via using spider cage. These results might be attributed to the effect of spider cage on improving the function of vestibular system. Stimulation of vestibular response provided by spider cage stimulates otolith organs through linear displacement. These findings come in agreement with Rine