The Posterior Tibialis Muscle is a major stabilizer of the rearfoot. Rupture or chronic stretching of this muscle, beyond its normal limit of excursion, can lead to a functional flatfoot. This acquired adult flat foot must be differentiated from the PreClinical Clubfoot Deformity which also results in a functional flatfoot.
Typical rupture point of this muscle is either at or within 6cm proximal to its navicular insertion.
Xrays frequently demonstrate:
Decreased calcaneal plantar angle
Increased lateral talometatarsal angle
Increased anterior talocalcaneal angle
Increased lateral talocalcaneal angle
Anatomy - Points of attachment:
Proximal: posterior surfaces of the shafts of the tibia and fibula
Distal: Passes beneath and inferior to the spring ligament inserting principally onto the tuberosity of the navicular. Secondary attachments onto all of the tarsus bones (except the talus) and to the bases of the 2nd, 3rd and 4th metatarsal bones.
Prof/Dr Brian A Rothbart Chronic Pain Elimination Specialist
Discovered the Rothbarts Foot Structure and the PreClinical Clubfoot Deformity
Developer of Rothbart Proprioceptive Therapy
Inventor and Designer of Rothbart Proprioceptive Insoles
Founder of International Academy of Rothbart Proprioceptive Therapy
Author of Forever Free From Chronic Pain