Primus Metatarsus supinatus values in Bracers

PMs values change relative to tonus patterns

Gravity forces the structurally elevated and inverted 1^st metatarsal and hallux to abnormally pronate until the entire medial column of the foot rests on the ground.  The body attenuates the abnormal pronation by plantarflexing the 1^st metatarsal (the posterior tibialis and peroneus longus muscles become hypertonic).

Tactile stimulation reverses hypertonicity in bracers.  As the PT and PL muscles debrace, the 1^st metatarsal and hallux will float upwards towards their anatomical neutral position. This changes the measured PMs value (see animated model, left).