What is the normal range for cervical spine flexion (chin to chest)?

What is the normal range for cervical spine flexion (chin to chest)?

• A. 0-70°
• B. 0-50°
• C. 0-40°
• D. 0-20°

Answer: (B)

Moving the chin toward the chest from a neutral head position is cervical flexion. In healthy people, this movement typically reaches about 40 to 50 degrees, with 50 degrees often used as the upper limit of normal in clinical practice. So a range that goes from neutral to around 50 degrees best matches the normal flexion range. The other options suggest either too much or too little motion for a typical healthy neck: 0-70° would exceed common normal limits, 0-40° is close but generally the upper end of normal is around 50°, and 0-20° reflects a noticeably restricted range rather than normal flexibility.

Moving the chin toward the chest from a neutral head position is cervical flexion. In healthy people, this movement typically reaches about 40 to 50 degrees, with 50 degrees often used as the upper limit of normal in clinical practice. So a range that goes from neutral to around 50 degrees best matches the normal flexion range.

The other options suggest either too much or too little motion for a typical healthy neck: 0-70° would exceed common normal limits, 0-40° is close but generally the upper end of normal is around 50°, and 0-20° reflects a noticeably restricted range rather than normal flexibility.