Multiplanar Interactions in the Cavovarus Foot

Our results indicate that forefoot adduction/midfoot supination are more pronounced in CMT pes cavus compared with idiopathic and controls, reflecting the severity of muscular imbalances characterizing the progression of CMT. The transverse and medial longitudinal arch are more severely affected in CMT compared with controls. Prior flatfoot studies have identified maximal collapse between the plantar medial cuneiform and the second and third metatarsals; our TAP angle findings demonstrate the opposite in CMT-associated cavus with significant exaggeration of transverse tarsal arch curvature. This exaggerated curvature likely contributes to the intrinsic stiffness characteristic of this foot morphology.