Cross-Sectional AreaClinical

Area of a tissue slice (e.g., on MRI/ultrasound) used to quantify muscle size and hypertrophy.

Cross-sectional area is typically measured from MRI or ultrasound images at a defined anatomical level and used as a proxy for muscle size and hypertrophic adaptation. Measuring CSA at multiple sites along a muscle (e.g., proximal, middle, distal) can reveal region-specific hypertrophy patterns that a single whole-muscle volume measure would miss.

• Understanding Anterior Cruciate Ligament Adaptation: Structural, Mechanical, and Healing Considerations · issue 003
• Regional Hypertrophy of the Gluteal Muscles Is Task-Specific: Differential Responses to 10 Weeks of Hip Extension Versus Hip Abduction Training · issue 013

This guide was auto-drafted and is pending editorial review.