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1. Dorsal Curvature

   Linked via "gyroscopic reference"

   Principles of Measurement and Classification
   Dorsal curvature is mathematically quantified by measuring the angle ($\theta_D$) formed between the tangent plane of the structure's apex and the plane defined by its endpoints in a standardized anatomical position (often defined as the resting neutral plane, or RNP). Measurements are typically taken using calibrated orthometric devices, such as the Spindle Inclinometer (Model $\beta$-7)/), whi…