睡眠用枕应符合人体颈椎生理曲度,那些软硬兼宜、舒适美观的枕头对人最合适。颈椎位于人体脊柱的最上端,包在脖子里面,由7块椎骨组成。为了缓冲和减轻行走、跳跃时的震荡,保护大脑,人体颈椎的7块椎骨 Sleeping pillow should be consistent with the physical curvature of the human cervical spine, those who hard and soft, comfortable and beautiful pillow on the most suitable person. Cervical vertebra is located in the top of the human body, wrapped in the neck, composed of seven vertebra. In order to buffer and reduce walking, jumping shock, protect the brain, the human body cervical vertebra 7