The ratio of the upper and lower body segments can be used to describe a person's bodily proportions.
Anatomic landmark: midportion of the pubic bone
from top of head to the midportion of the pubic bone
from the midportion of the pubic bone to the sole of the foot
total body height =
= (length of the upper body segment) + (length of the lower body segment)
ratio of the upper to lower body segment =
= (length of the upper body segment) / (length of the lower body segment)
• The ratio is approximately 1.0 at age 10. It is usually > 1 in children and < 1 in adolescents and adults.
• Adult males tend to have longer legs than women, so the ratio in adult males is lower.
• Pituitary dwarfs tend to have a higher ratio because the upper segment is proportionately longer than the lower segment.
• The subject should stand perfectly straight with eyes forward. Bending forward can lower the ratio.
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