Quiz #10 Flashcards
what is the role of the ankle joint?
rigid lever and mobile adaptor
when the ankle is becoming a mobile adaptor, do the axes of the talonavicular jt become more parallel or cross?
the axes become more parallel
when the ankle is becoming a rigid lever, do the axes of the talonavicular jt become more parallel or cross?
the axes cross
what are the triplanar motions that make up pronation?
DF
eversion
abduction
what are the triplanar motions that make up supination?
PF
inversion
adduction
the pronation/supination contribution from the MTJ is ___ that of STJ
2x
what happens at the STJ in the CKC?
the talus moves on fixed WB calcaneous
WB IR/ER causes pro/sup
allows accomodation on uneven ground
does pronation or supination accompany tibial IR?
pronation
does pronation or supination accompany tibial ER?
supination
t/f: in the normal foot on the ground, calcaneal condyle on the ground and heads of the metatarsals on the ground are lying in the same plane, the rear foot is slightly inverted
true
what actions occur at the longitudinal axis of the MTJ?
inversion/eversion
what actions occur at the oblique axis of the MTJ?
DF/PF
abd/add
motion around the oblique axis of the MTJ is enhanced by putting the foot in what position?
abduction
t/f: pts may outtoeing w/ambulation to allow more pronation from unlocking the midtarsal jt’s oblique axis
true
what kind of jt is the tarsometatarsal jt?
plantar synovial jt
what are the jt surfaces of the tarsometatarsal jts?
bw the tarsal and respective metatarsal jts
what makes up the 1st ray of the foot?
1st cuneiform and 1st metatarsal
what is the most mobile ray of the foot?
the 1st ray
what makes up the 2nd ray of the foot?
2nd cuneiform and 2nd metatarsal
what is the most restricted ray of the foot?
the 2nd ray
what makes up the 3rd ray of the foot?
3rd cuneiform and 3rd metatarsal
what makes up the 4th and 5 rays of the foot?
cuboid and 4th and 5th metatarsals
how much 1st MTP ext is needed for normal gait? for running?
65 deg, 85 deg
t/f: when there is a reduction in ROM of the 1st MTP, it acts like decreased DF
true
what are some compensations for decreased 1st MTP/DF?
steppage gait
circumduction gait
out-toeing
what is hallux limitus?
not as much motion as it should have
what is hallux rigidus?
very stiff
what is the Windlass mechanism?
when the big toe is on the ground as you DF and it tightens up
what is the most injured lig in the body?
ant TF
what provides stability of the talocrural jt medially?
interosseous membrane
med collateral lig-deltoid lig
what provides stability of the talocrural jt laterally?
interosseous membrane
ant TF lig
calcaneofibular lig
post TF lig
lateral ankle sprains make up what % of ankle sprains?
85
how does a lat ankle sprain usually occur?
PF and inversion
the ATF lig is involved in what % of all ankle sprains?
60-70%
what % of ankle sprains involve the ATF and CF ligs?
20%
are more lig tears at the lat ankle mid-substance or avulsion injuries?
mid-substance
are mid-substance or avulsion injuries easier to treat? why?
avulsion injuries are easier to treat bc it’s easier to heal bone on bone than bone to lig
what causes a tib fib syndesmosis sprain (high ankle sprain)?
forced DF
what causes an ant capsule ankle sprain?
forced PF
what is a grade 1 lateral ankle sprain?
min edema, localized tenderness over ATF (12 days b4 return)
what is a grade 2 lateral ankle sprain?
localized edema, diffuse tenderness (2-6 weeks b4 return)
may use crutches for a few days
may have ecchymosis
what is a grade 3 lateral ankle sprain?
edema, ecchymosis (more than 6 wks b4 return)
only 25-60% symptoms free 1-4 yrs post injury
what are the s/s of lat ankle sprain?
edema and hematoma suggests rupture
TTP over ATF
(+) ant drawer
(+) talar tilt test
(+) squeeze test
(+) ER test
what is a (+) ant drawer test?
holding the tibia back and calcaneous forward creates p!
what is the talar tilt test?
mildly invert the foot (can also PF)
what is the squeeze test-?
squeeze the tibia and fibula together (high ankle sprain test)
mechanical instabilities and fxnal instabilities at the ankle can lead to what?
recurrent ankle sprains
when the rear foot is inverted is the there more or less pronation?
less pronation
is the foot a good or bad mobile adaptor inless pronation?
bad mobile adaptor
does a supination or pronated foot lead to lat ankle sprain?
supinated foot
what exercises can improve proprioceptive kinesthesia of the ankle?
ankle pumps with therabands (although not the best) and CKC strengthening for fxnal exercise
what are the interventions for for lat ankle sprains?
control edema
early, supported WB (taping, bracing)
proprioceptive training
OKC to CKC using non-dominent to dominant planes
multiplane fxnal training
plyometrics
sport-specific training
work towards offending plane of motion
why are med ankle sprains less likely than lat ankle sprains?
bc the med ankle has more robust support
t/f: there is a greater risk of an avulsion fx of the med mal with a med ankle fx
true
t/f: the approaches to treat lat vs med ankle sprains are different
false, they are similar
t/f: plantar fascitis is sometimes self limiting
true
what % of women with plantar fascitis are obese?
90%
what % of men with plantar fascitis are obese?
40%
what age does plantar fascitis usually occur at?
40-60 yo
what occupational factor leads to plantar fascitis?
prolonged standing/walking
what causes acute plantar fascitis?
something hits the arch of the foot hard
what factors affect anatomical plantar fascitis?
thickness and compressibility of heel pad
what are the biomechanical causes of plantar fascitis?
pes cavus, pes planus, overpronation, weak foot intrinsics, hallux rigidus/limitus
t/f: weak glut med/max can contribute to plantar fascitis
true
t/f: bad DF of the hallux can contribute to stress on the plantar fascia
true
t/f: plantar fascitis usually has an insidious onset
true
what are the s/s of plantar fascitis?
morning pain
15-30% BL
gastrocs tightness in 78% (trying to DF during gait but the gastrocs won’t let it)
TTp med calcaneal tubercle
p1 w/great toe ext
(+) Windlass test (p! with great toe ext)
presence of heel spurs
hallux abductor valgus (HAV): bunion from excessive pronation
what are the interventions for plantar fasciitis from most to least helpful?
low dye taping to support the arch
foot intrinsic PREs
stretching (gastrocs/plantar fascia)
TFM (transverse friction massage)
orthotics
high splints
great toe mobility
NSAIDS
US/phonophoresis
laser
extracorporeal shock wave therapy (adds mechanical influence)
injections
surgery
how many newtons of force can the Achilles tendon handle?
9000N
what is the strongest tendon in the body?
the Achilles tendon
what are the actions of Achilles tendon?
PF and inversion
what tendon controls DF, eversion, and pronation?
Achilles tendon
does the paratenon of the achilles tendon have a synovial sheath?
no, this affects it stealing process
where is the blood supply for the Achilles tendon?
paratenon and muscles vessels
what is nerve supply of the achilles tendon?
sural nerve
what is the most common overuse syndrome of the LE?
Achilles tendinopathy
what is the prevalence of Achilles tendinopathy?
57% in runners (2.9-4% of non-athletes)
what is the incidence of Achilles tendinopathy?
7/100,000 in general population
t/f: there is increased incidence of Achilles tendinopathy with increased age
true
what is the mean age in which Achilles tendinopathy occurs?
30-50 yo
what is usually the MOI in Achilles tendinopathy?
eccentric loading and overpronation
what actions can cause rupture of the Achilles tendon?
push off, sudden DF in WB, forceful DF
what is the difference bw insertional and noninsertional
insertional is closer to the enthesis
noninsertional is more in the midsubstance
is insertional or non insertional injuries easier to treat?
non insertional (mid-substance)
is midsubstance or calcaneal insertional injuries of the Achilles tendon more common?
mid-substance
are mid-substance injuries of the Achilles tendon more so the med or lat aspect of the midsubstance?
med aspect of the midsubstance