EXTENSOR DIGITORUM LONGUS M

Question 1

what periods of the stance phase is the extensor digitorum longus m active?

Answer 1

propulsion

Question 2

what is the function of the extensor digitorum longus m during the propulsion period of the stance phase?

Answer 2

begins to contract during the last half of the propulsive period

assists the lumbricals in developing extensor rigidity of the IPJs during propulsion in each

has no function in midstance

Question 3

what is significant of the muscle during the propulsion phase of the stance phase?

Answer 3

creates a rigid beam of the digits for propulsion

Question 4

what is significant with respect to peak of the muscle during the swing phase?

Answer 4

peak activity at the beginning of swing phase and at the end of swing phase

Question 5

what is the function of the muscle during swing phase?

Answer 5

assists in dorsiflexing of the foot for toe clearance during swing

prevents excessive supination of the foot, pronates STJ and MTJ

Question 6

what is the pathology of the extensor digitorum longus?

Answer 6

if inactive or weak:

excessively supinated STJ and MTJ during the swing phase

foot drop during mid swing due to loss of dorsiflexion

Question 7

articulations of the extensor digitorum longus?

Answer 7

ankle joint

STJ

LMTJ

OMTJ