Fig. 1. Linear measurements of the jugular foramen (JF). (A) a: Anteroposterior diameter (APD) of the anteromedial compartment of the JF; b: APD of the posterolateral compartment of the JF. (B) c: Lateromedial diameter (LMD) of the anteromedial compartment of the JF; d: LMD of the posterolateral compartment of the JF. Total LMD=c+d.
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