You can see that dorsiflexion could be described as either flexion or extension, dependent on the criterion used. Terminology used to describe movements of the foot can become very confusing. We can demonstrate movements of the whole foot relative to the leg. When the foot is moved so that the plantar surface faces medially, this is called inversion . Because of the obliquity of the axis of inversion, this involves plantar flexion and adduction of the foot.
Eversion is the opposite movement, and it has less range of motion.
These movements can be demonstrated and tested. Return to Lecture Outline. You may like more information on ankle sprains . There are superficial fibres radiating mainly from the anterior part of the medial malleolus and deep fibres, generally radiating from the posterior part. The naviculotibial part forms the largest, widest, but weakest part of the superficial portion of the deltoid ligament.