INTEROSSEI M

Question 1

when is this active?

Answer 1

late midstance to late propulsion (stance phase muscles)

Question 2

how many muscles total?

dorsal
plantar

Answer 2

7

4 dorsal
3 plantar

Question 3

fxn?

Answer 3

stabilize the bases of lesser 4 proximal phalanges

stabilizes bases of proximal phalanges transversely

assist in function of the exterior expansion in some

tendon inserts into plantar plate

Question 4

why is the tendon insertion into the planter plate important?

Answer 4

will apply plantarflexory force on proximal phalanx

Question 5

pathology

Answer 5

hammer digit syndrome (contracture of digits)