Muscle Compartment

These areas are to be measured at the L3-L4 intervertebral disc level.

• PMA : Psoas muscle area
• PSMA: Paraspinal muscle area
• TSMA: Total muscle area

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For more information, please refer to the following literature

Kudo W, Terui K, Hattori S, Takenouchi A, Komatsu S, Oita S, Sato Y, Hishiki T.
Establishment and validation of reference values for abdominal skeletal muscle compartments in children.
Clin Nutr. 2023 Mar 2;42(5):653-660. doi:10.1016/j.clnu.2023.02.022.