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MSK 2 test 2 > biomechanics of ankle and foot > Flashcards

biomechanics of ankle and foot Flashcards

1
Q

dorsiflexion and plantarflexion; eversion and inversion degrees

A

20 df

50 pf

35 inversion

15 eversion

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2
Q

Talocrural joint is between which segments

A

Leg and rear foot

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3
Q

Transverse tarsal joint is between

A

rear foot and mid foot

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4
Q

Tarso metatarsal joints are between

A

Mid foot and forefoot

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5
Q

Rear foot includes

A

Talus calcaneus
Subtalar joint

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6
Q

mid foot includes

A

navicular, cuboid, cuneiforms

Transverse arch

Medial longitudinal arch

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7
Q

forefoot

A

metatarsals phalanges

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8
Q

proximal tibiofibular joint

A

Planar synovial joint with capsule

tibia convex fibula concave

Accommodates motion occurring at ankle

motion- Superior/inferior glide and AP oblique glide

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9
Q

Tibiofibular joint during ankle dorsiflexion

A

Fibula laterally rotates and moves superior posterior

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10
Q

tibiofibular joint during knee flexion and extension

A

Flexion- anterior glide
Extension - posterior glide

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11
Q

distal tibiofibula joint

A

fibrous syndesmosis

Concave tibia , convex fibula

Maintain a stable ankle mortise

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12
Q

Talocrural joint

A

synovial
Modified sellar or hinge joint uniaxial

1° of freedom dorsiflexion and plantarflexion

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13
Q

talocrural joint open and close positions

A

open- 10° plantar flexion

Close - end range dorsiflexion

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14
Q

talus and mortice shape

A

convex talus
concave mortise (plafond)

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15
Q

does talus have muscular attachment?

A

no
limited blood supply too

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16
Q

capsular pattern limitations

A

We will have a loss in plantarflexion before we have a loss in dorsiflexion

17
Q

ligamentous support for the talocrural joint

A

lateral- anterior and posterior talofibular, calcaneofibular

medial- deltoid (tibionavicular, ant and post tibiotalar, and tibiocalcaneal)

18
Q

subtalar joint

A

three joints
Modified ovoid functioning as a modified sellar

Three separate facet articulations- posterior, middle and anterior

1° of freedom, inversion and eversion

(some add/abd and slight PF DF)

19
Q

subtalar joint open and close positions

A

open- neutral pronation/supination and 10 degrees of pf

close- supination

20
Q

capsular pattern of subtalar joint

A

varus limitations > valgus

21
Q

ligamentous support subtalar joint

A

internal- cervical ligament, interosseous talocalcaneal lig

extrinsic- calcaneofibular lig, deltoid lig

22
Q

function of subtalar joint

A

Triplanar motion- pronation supination

Accommodates rotational force between leg and foot

Maintains foot contact with ground during stance

calcanal iv/ev > midfoot pronation/supination

23
Q

Transverse tarsal joint

A

midtarsal or choparts joint

taloNavicular joint
calcaneocuboid joint

24
Q

talonavicular joint

A

part of transfers tarsal joint

concave- navicular
convex- talus

Deep condyloid

iv/ev and df/pf

talonavicular and spring ligaments

25
Q

calcaneocuboid joint

A

part of transverse tarsal joint

saddle joint
Forms interlocking wedge that resists gliding of the joint
Provide stability to lateral column

dorsal calcaneocuboid ligament, bifurcate lig, long/short, plantar ligaments

26
Q

Motion of transverse tarsal joint

A

two oblique axes

primary- longitudinal or AP axis; IV/EV

secondary- oblique axis; ABD/ADD and PF/DF

27
Q

Open and close position of transverse tarsal joint

A

Open- midpoint of pronation/supination and 10° of plantarflexion

close- full supination

28
Q

subtalar and transverse tarsal joint work together for

A

Composite motions of supination and pronation

29
Q

subtalar joint in supination reduces

A

Mobility of midfoot

30
Q

subtalar joint in pronation increases

A

Mobility of midfoot

31
Q

tarsometatarsal joints

A

synovial planar joints

Lisfranc joint

Degrees of freedom -flexion/ extension, sup/pron

Functions to keep contact with ground

32
Q

closed position and open position of Tarsometatarsal joints

A

Open- midpoint of sup/pronation

close- full supination/ extension

33
Q

ray 1 & 2

A

iv/df
ev/pf

34
Q

ray 3

A

df/pf

35
Q

ray 4&5

A

ev/df
iv/ pf

36
Q

metatarsophalangeal and interphalangeal joints

A

synovial condyloid

degrees or freedom- 2 flex/ext and add/abd

capsular pattern-
MTPs ext> flex
IP flex> ext

37
Q

close and open metatarsophalangeal and interphalangeal joints

A

Open- neutral, slight flex

Close - full extension

38
Q

ligamentous support for MTP and IP

A

collateral ligaments
Plantar plates
Transverse metatarsal ligaments

39
Q

sesamoids

A

Sit under the first metatarsal head

pulley for flexor hallucis brevis

Flexor Hallucis longus tendon passes between the sesamoids, which offers some protection on the base of the foot

MSK 2 test 2 (10 decks)

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