ANTERIOR COMPARTMENT M ACTIONS (PERIODS)

Question 1

Decelerates ankle joint plantarflexion at heel strike and until the forefoot is fully loaded

When relaxing it allows for smooth loading of the forefoot from lateral to medial due to a decrease in forefoot inversion

Answer 1

Tibialis Anterior

M. - CONTACT

Question 2

Assists in dorsiflexion of the foot at toe off so the toes can clear the ground

Answer 2

Tibialis Anterior M.- PROPULSION

Question 3

Supinates the forefoot at the LMTJ and dorsiflexes the first ray

Weak supinator of the entire foot

Answer 3

Tibialis Anterior M.- SWING

Question 4

Assists in deceleration of the foot at heel strike

Answer 4

Extensor Hallucis Longus M-CONTACT

Question 5

Provides extension stability along with the Extensor Hallucis Brevis at the 1st MPJ

Turns hallux into a rigid beam

Answer 5

Extensor Hallucis Longus M-PROPULSION

Question 6

Strongest ankle joint dorsiflexor - most responsible for rapid ankle joint dorsiflexion so the foot can clear the ground

Neutral dorsiflexor having little effect on the STJ

Answer 6

Extensor Hallucis Longus M- SWING

Question 7

Assists the lumbricales in developing extensor rigidity of the IPJs during propulsion in each lesser digit

Creates rigid beam of digits for propulsion

Answer 7

Extensor Digitorum Longus M-PROPULSION

Question 8

Prevent excessive supination of the foot during the swing phase by exerting a pronatory force (Antagonist)

Answer 8

Extensor Digitorum Longus M-SWING