Ankle: Anatomy 3 Flashcards
STJ is what type of joint?
uniaxial
synovial
STJ: How many articulations with the tibia?
3
STJ: location of 3 articular facets with the tibia
2 anterior
1 posterior
Axis of the STJ is (uni/bi/tri)planar
triplanar
The triplanar axis of the STJ travels from where to where?
FROM lateral/posterior/inferior
TO medial/anterior/superior
STJ OKC movement components:
pronation
CALCANEAL EVERSION
forefoot dorsiflexion and abduction
STJ OKC movement components:
supination
- Calcaneal inversion
- forefoot adduction and plantarflexion
STJ CKC movement components:
pronation
- CALCANEAL EVERSION
- adduction and PF of head of the talus
STJ CKC movement components:
supination
- calcaneal inversion
- abduction and dorsiflexion of the head of the talus
During gait, this STJ motion allows the MTJ to unlock and become flexible to the surface
pronation
During gait, this STJ motion allows the MTJ to become more rigid for propulsion
supination
Medial rotation of the leg causes a (valgus/varus) movement of the calcaneus
valgus
Lateral rotation of the leg causes a (valgus/varus) movement of the calcaneus
varus
Joints of the midfoot: Which are they?
- talocalcaneonavicular
- calcaneocuboid
- cuboideonavicular
- intercuneiform
- cuneocuboid
midfoot joints: resting position
midway between pronation and supination
midfoot joints: closed packed position
supination
midfoot joints: capsular pattern
DF > PF > adduction > medial rotation (inv)
midfoot joints: arthrokinematics around these axes
longitudinal
oblique
midfoot joints:
During pronation/supination, which bones are moving primarily?
navicular
cuboid
midfoot joints: During supination (inversion), the concave navicular rolls and glides (direction) on the convex talus
superiorly
laterally
midfoot joints: During supination (inversion), the concave cuboid rolls and glides (direction) on the convex calcaneus
inferiorly
medially
midfoot joints: During pronation (eversion), the concave navicular rolls and glides (direction) on the convex talus
inferiorly
medially
midfoot joints: During pronation (eversion), the concave cuboid rolls and glides (direction)
superiorly
laterally
joints of the forefoot: 1st ray TMT joint is an attachment between these bones
medial cuneiform
1st metatarsal
joints of the forefoot: 1st ray TMT joint is (uni/bi/tri)planar
triplanar
joints of the forefoot: 5th ray TMT joint is an attachment between these bones
5th metatarsal
cuboid
1st MTP: need how much extension for gait
65-70˚
1st MTP: need how much extension for sprinting
~90˚
1st MTP: normal extension
70˚
1st MTP: normal flexion ROM
45˚
1st MTP: normal abd/add ROM
15˚
2nd-5th MTP: ext ROM
> 45˚
2nd-5th MTP: flex ROM
40˚
2nd-5th MTP: abd/add ROM
5-20˚
MTP joints: types of joints
condyloid
synovial
MTP joints: degrees of freedom
2
MTP joints: proximal phalanx is (convex/concave)
concave
MTP joints: metatarsal head is (convex/concave)
convex
MTP joints: closed packed position
full extension
digits 2-5 may be closed packed in full flexion
MTP joints: resting position
10˚ ext
MTP joints: capsular pattern
limited ext > flex
IP joints: type
hinge
synovial
IP joints: distal phalanx is (convex/concave)
concave
IP joints: proximal phalanx is (convex/concave)
convex
IP joints: motions performed
flexion
extension
IP joints: closed packed position
extension
IP joints: capsular pattern
limited flex > ext
IP joints: ROM
1st IP
0-90˚
IP joints: normal ROM PIP 2-5
0-35˚
IP joints: DIP 2-5 ROM
30˚ ext
60˚ flex