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- Physiological cross-sectional area
Area perpendicular to fiber direction
In muscle physiology, physiological cross-sectional area is the area of the cross section of a muscle perpendicular to its fibers, generally at its largest point. It is typically used to describe the contraction properties of pennate muscles. It is not the same as the anatomical cross-sectional area (ACSA), which is the area of the crossection of a muscle perpendicular to its longitudinal axis. In... Wikipedia
