Which anatomical feature is described as the line for the ligament that looks like a trapeze?

Which anatomical feature is described as the line for the ligament that looks like a trapeze?

• A. Facet for plantar calcaneonavicular ligament
• B. Trapezoid line
• C. Epiphyseal plate
• D. Conoid ligament

Answer: (B)

The line described is the trapezoid line. It’s the ridge on the inferior aspect of the clavicle where the trapezoid ligament of the coracoclavicular complex attaches. The trapezoid ligament, named for its trapezoid shape, helps suspend the clavicle from the scapula alongside the conoid ligament (which attaches at the conoid tubercle). So this line marks the footprint of the trapezoid part of that ligament, distinguishing it from the other options: the facet for the plantar calcaneonavicular ligament is in the foot, the epiphyseal plate is a growth area in long bones, and the conoid ligament attaches at the conoid tubercle rather than along this line.

The line described is the trapezoid line. It’s the ridge on the inferior aspect of the clavicle where the trapezoid ligament of the coracoclavicular complex attaches. The trapezoid ligament, named for its trapezoid shape, helps suspend the clavicle from the scapula alongside the conoid ligament (which attaches at the conoid tubercle). So this line marks the footprint of the trapezoid part of that ligament, distinguishing it from the other options: the facet for the plantar calcaneonavicular ligament is in the foot, the epiphyseal plate is a growth area in long bones, and the conoid ligament attaches at the conoid tubercle rather than along this line.