Abstract: Objective To investigate the effect of the head control on the body balance in normal subjects.Methods 25 normal young adults(21～23 years old) stood on the balance board,and the lateral balance limit angles were tested when girded with or without Philadelphia collar.The data were analyzed.Results When girded with collar,the lateral balance limit angles of 25 subjects were 11.80°±5.86°(left) and 12.00°±7.18°(right);when without collar,those were 11.48°±5.57°(left) and 11.60°±7.23°(right).The angles were not significantly different when with or without collar(P>0.05).Conclusion The neck-vestibular reflect does not play an important role during human keep their body balance.

Key words: balance ability, neck-vestibular reflect, neck control