ACB 로고

pISSN 2093-3665 eISSN 2093-3673
Table. 1.

Measurements of transversus abdominis muscle taken at different anatomical landmarks

Xiphisternum Minimum Maximum Mean±SD Median IQR P-value
R L R L R L R L R L
Distance between medial margin of TA to LA (mm) 11.31 10.6 24.72 20.9 17.0±4.7 15.6±3.2 16.9 15.7 20.6–12.8 17.9–12.9 0.40
Distance between the lateral border of RA to LA (mm) 54.1 56.9 92.7 83.4 75.9±12.4 69.8±8.5 82.6 68.6 84.8–64.4 77.6–62.2 0.02*
TA distance (RL–TL) 41.3 39.7 80.6 80.2 61.6±11.8 58.9±11.9 61.3 60.6 70.5–52.6 67.7–52.1 0.37
Midway between xiphisternum and umbilicus
Distance between medial margin of TA to LA (mm) 20.5 21.25 72.71 51.77 49.4±16.0 42.8±9.3 49.5 47.1 63.6–37.2 64.4–49.5 0.53
Distance between the lateral border of RA to LA (mm) 48.2 48.3 92.7 83.4 74.8±12.7 69.9±9.4 77.2 71.3 84.6–66.5 77.1–65.5 0.05
TA distance (RL–TL) 12.84 15.5 39.1 36.6 25.4±9.0 27.1±5.9 27.4 27.8 32.8–15.9 32.1–15.2 0.29
Umbilicus
Distance between medial margin of TA to LA (mm) 58.6 57.8 125.6 114.4 93.8±19.2 91.0±17.9 98.3 95.6 102.6–96.4 106.8–81.1 0.12
Distance between the lateral border of RA to LA (mm) 51.1 56.2 85.7 89.8 69.2±10.3 69.6±9.9 68.5 69.4 74.3–61.2 76.6–60.6 0.80
TA distance (RL–TL) –40 –38.8 –67 –1.7 –24.6±11.9 –21.4±12.4 –27.4 –21.3 –19.6 to –34.8 –8.9 to –33.3 0.26
Arcuate line
Distance between medial margin of TA to LA (mm) 58.4 48.2 107 97.7 88.7±13.5 83.3±14.7 92.4 87.4 95.9–87.2 93.9–79.9 0.15
Distance between the lateral border of RA to LA (mm) 53.7 52.8 82.4 77 63.7±7.7 63.3±6.2 63.3 61.6 66.9–57.7 67.3–59.6 0.70
TA distance (RL–TL) –36.3 –37.2 –4.1 11.6 –24.9±8.6 –19.9±14.4 –27 –23 –23.4 to –30.2 –10.5 to –32.1 0.18
Midway between arcuate line and symphysis pubis
Distance between medial margin of TA to LA (mm) 56.2 58.5 82.6 73.4 73.2±6.9 67.0±4.7 76 67.3 77.2–72.4 71.2–63.4 0.01*
Distance between the lateral border of RA to LA (mm) 41.5 39.5 68.2 67.3 50.4±6.9 48.1±8.7 49.3 45.2 53.5–45.9 49.7–41.3 0.34
TA distance (RL–TL) –30.9 –26.5 –6 –5.7 –22.9±6.5 –18.9±6.0 –24.1 –20.4 –17.3 to –28.1 –15.2 to –23.3 0.11

Shows the distance from the linea alba (LA) to the medial border of transversus abdominis (TA) and the lateral border of rectus abdominis (RA) measured at different anatomical levels. Negative distances indicate overlap. Positive distances indicate lack of overlap. Mean TA distance is calculated by RL–TL. IQR, interquartile range; R, right; L, left. The P-value is obtained by means of 2 tailed paired t-test. *Statistically significant.

Anat Cell Biol 2024;57:363~369 https://doi.org/10.5115/acb.23.305
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