Which of the following is a lateral directed force in the context of UCBL for pes varus/supination?

In the context of UCBL (University of California Biomechanics Laboratory) orthotic design for managing pes varus or supination, understanding the aim of lateral directed forces is crucial in correcting or accommodating foot deformities. A lateral directed force on the medial calcaneus is effective because it helps to counteract the excessive supination that often occurs in patients with pes varus. By applying a force in this area, the orthotic can encourage the foot into a more neutral position, which is essential for proper alignment and function.

The medial calcaneus is a pivotal area, as pressures applied here can influence the alignment of the entire foot structure, promoting stability and balance during standing and ambulation. This area can help reduce the tendency of the foot to roll inward, which is a common problem in supinated feet.

Other structures, like the metatarsal heads, do not provide the same level of mechanical advantage in addressing the varus deformity as effectively as the medial calcaneus does. Thus, the orientation and specific placement of lateral directed forces are critical in achieving therapeutic outcomes with orthotic interventions in pes varus/supination.