LATERAL COMPARTMENT M ACTIONS (PERIODS)

Question 1

Stabilize the first ray transversely and posteriorly against the lesser tarsus. Plantarly stabilizes the first metatarsal head firmly against the ground

LMTJ pronator

Weakly assists in deceleration of ankle joint dorsiflexor and aid in heel lift

Answer 1

Fibularis Longus

MIDSTANCE

Question 2

Stabilize the first ray transversely and posteriorly against
the lesser tarsus. Plantarly stabilizes the first metatarsal head firmly against the ground

LMTJ pronator

Weekly assist in ankle joint plantarflexion

Transfer weight from the lateral to medial side of the forefoot and on to the opposite foot during early propulsion. Soleus relaxes making cuboid unstable pulley. Lifts peroneus longus contracts causing lateral to medial loading

Answer 2

Fibularis Longus

PROPULSION

Question 3

Assists in developing abduction stabilizing force on the lesser tarsus

Provides an antagonistic pronation force at the STJ to resist supination of the foot and external leg rotation by the calf muscles

Assists in transferring weight from lateral forefoot to medial forefoot and on to the opposite foot

Answer 3

Fibularis Brevis

MIDSTANCE

Question 4

Assists in developing abduction stabilizing force on the lesser tarsus

Assists in transferring weight from lateral forefoot to medial forefoot and on to the opposite foot

Answer 4

Fibularis Brevis

PROPULSION