A.C2~C3 B.C3~C4 C.C4~C5 D.C5~C6 E.C6~C7
A.上頸椎以旋轉(zhuǎn)運(yùn)動(dòng)為主 B.下頸椎以屈伸運(yùn)動(dòng)為主 C.C1~C2無(wú)屈伸運(yùn)動(dòng) D.C1~C2旋轉(zhuǎn)范圍可達(dá)47° E.C5~C6屈伸活動(dòng)范圍最大
A.C1~C2 B.C2~C3 C.C3~C4 D.C4~C5 E.C5~C6