Two hundred and fifty-two cervical zygapophyseal joints in 22 cadavers were observed.All of the joints contained meniscoid structures in the shape of newmoon,midmoon,leaf,etc.They were all connected with the articular capsules and extended into the articular cavities to a greater or lesser extent.Most of them existed at the upper or lower poles in the joints and increased from C_(2-3) to C_(6-7).The meniscoid structures could be divided into three types under the microscope:thin membranous form,adipoid form...