TO STUDY THE ASYMMETRY PRESENT IN MANUBRIUM STERNI AND PATELLAR BONES AS A RESULT OF RIGHT SIDE DOMINANCE
Objective: To evaluate asymmetry present in patellar bones bilaterally along with right and left sides of manubrium
sterni, as a result of right sided body wall dominance.
Material and Methods: This study work was carried out on bones collected from cadavers in Anatomy Department of
KGMC Peshawar. A total number of 24 patellar, and 10 manubrium sterni bones were included in this study to compare
their respective weight, height, breadth and thickness. The manubrium index and patellar index were calculated from
respective parameters. The Student’s t-test was applied for all quantitative data and a p-value of ≤ 0.05 was taken
Results: The mean height of right side was more than the left side of manubrium sterni. The mean thickness of right side
of manubrium sterni was more than that of left side though it was not significant but a significant (p=0.05) difference
were noted when manubrium index of right side were compared with the left side of manubrium sterni. The mean height
of right patella was less than left patellar bones but no considerable difference were noted in their breadth, thickness
and weight bilaterally. The right patellar index was considerably less when compared with left, but not significant.
Conclusion: This study concludes that significant asymmetry seen in right side of manubrium sterni could be due to
right side body wall dominance which is largely compensated in patellar bones by environmental factors, like walking,
running and equal support of body weight, leading to a less prominent asymmetry.
Key Words: Body asymmetry, Manubrium sterni weight, Manubrium sterni measurements, Patellar weight, Patellar