mid/forefoot Flashcards Preview

AN3202 > mid/forefoot > Flashcards

Flashcards in mid/forefoot Deck (22)
Loading flashcards...
1

function of talocalcaneonavicular (TCN) joint (This is a "virtual" joint)

produces pronation/supination

also does plantarflexion/dorsiflexion

2

transverse tarsal joint (functions as a unit)

talonavicular
calcaneocuboid

is the border for hindfoot and midfoor

3

action of transverse tarsal joint

adds supination/pronation ROM (helps you stand on a hill)

compensate forefoot/hindfoot position so forefoot can remain on ground

4

when the trasnverse tarsal joint supinates, what happens to the tarsals?

they go into a tight-packed position

midfoot and rearfoot lock on each other to act as a solid bone to assist propulsion!

5

what metatarsal joint is unique

the 2nd met - articulates with all 3 cuneiforms

it is the MOST stable tarsometarsal joint

6

function of tarsometatarsal joints

maintains contact of forefoot on the ground

if rear-foot motion (transverse tarsal and subtalar joints) are extreme, TMT can pick up the slack!

7

open chain actions of TMT (dorsfilexion)

extnesion and inversion of mets 1 and 2

eversion of mets 4 and 5

8

open-chain actions of TMT (plantarflexion)

flexion and inversion of mets 4 and 5

eversion of mets 1 and 2

9

closed chain action of TMT (supination twist).. when hind foot pronates

transverse tarsal joint supinates to end range

if this is insufficient, medial forefoot will press into ground resulting in dorsiflexion and inversion of 1st and 2nd mets.

then plantarflexion will happen? reuslting in 4 and 5 will invert

overall the ENTIRE FOOT INVERTS

10

closed chain action of TMT (pronation twist).. when hind foot supinates and midtarsal joint is locked

we end up with total eversion of mets 1,2,3,4 and some dorsiflexion of mets 4 and 5.

Whole forefoot EVERTs w/ pronation twist!

11

function of metatarsophalangeal joints

plantarflexion/dorsiflexion
abduction/adduction

12

major motion at metatarsophalangeal joints

plantarflexion/dorsiflexion dominate

13

when the 2nd met is the longest met, whats it called? exam

index minus

14

being index minus (elongated 2nd metatarsal) can result in

metatarsalgia, plantar warts, mallet toe

15

treat elongated 2nd metatarsal

use metatarsal pad, fit shoes for 2nd met, and avoid high heeled shoes.

16

what is morton's foot

shortened 1st toe (its even shorter than your 3rd toe)

17

what can an elongated first metatarsal lead to?

hallux limitus deformity

18

treatment for hallux limitus defomirty (elongated first metatarsal)

kinetic wedge or a rocker bottom sole

19

a very sharp metatarsal break angle leads to

shifts weight laterally on the foot

20

typical range of metatarsal break angle

54 to 73 degrees

this reduces the extension range required for 1st and 2nd MTPs

21

function of great toe sesamoids

anatomic pulleys for FHb

acts as a tunnel to protect FHL tendon

22

purpose of interphalangeal joints

maintain contact with the ground just before toe off