✔️ The cervical spine's range of motion is approximately 80° to 90° of flexion (leaning forward), 70° of extension (leaning backwards), 20° to 45° of lateral flexion (sideways movement), and up to 90° of rotation to both sides.
✔️ We swallow between 500-700 times a day.
✔️ 18,000 to 20,000 litres of air pass through our nose each day.
✔️ Head weighs just over 8% of your total body weight, about 5kgs (11lbs), the adult brain is about 2% of the total body weight. 1.3 to 1.4kgs.
✔️ By looking down at your phone, at an angle of around 45°, the force your head puts on your neck increases all the way to 22kg!
✔️ Supported on 7 cervical (neck) vertebrae and 26 neck muscles.
✔️ There are 42 individual facial muscles.
10th May 2021