Foot Function Theoretical perspectives

Question 1

Give a brief explanation of Root Theory of Foot function

Answer 1

Root Theory

Based on a series of Static measurements to predict kinematic foot function

In order for the foot to be normal, The Subtalar Joint (STJ) should be in a neutral position and the Midtarsal joint should be fully locked.

Any deviation from this alignment is considered to be abnormal and should therefore display some form of mechanical dysfunction

Question 2

Give a brief explanation of Sagittal Plane Theory Dannenberg

Answer 2

Sagittal Plane Theory

For motion to occur smoothly and efficiently within the Sagittal Plane, movement passes through 3 pivotal points :

Plantar Calcaneus - Rocker bottom side of plantar calcaneus

Ankle - 10 degree dorsiflexion of the Tibia on the Talus prior to heel off

Metatarsophalangeal Joint - 65 degree dorsiflexion considered the minimum to be needed at the MTPJ

Restriction in the movement specific to propulsion during gait in any one of these sites will affect the other joints and require compensation.

Question 3

Give a brief overview of the Tissue Stress Theory