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Podiatric Biomechancics 1
podiatric biomechanics qut australia
68
Medical
Undergraduate 2
10/27/2008

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Term
The ankle joint axis is how many degrees to the TV Plane?
Definition
8 degrees
Term
The ankle joint axis is how many degrees to the F Plane?
Definition
20-30 degrees
Term
The STJ joint axis is how many degrees to the TV Plane?
Definition
42 degrees
Term
The STJ joint axis is how many degrees to the S Plane?
Definition
16 degrees
Term
The OA of the MTJ is how many degrees to the TV Planes?
Definition
52
Term
The OA of the MTJ is how many degrees to the s Planes?
Definition
57
Term
The LA of the MTJ is how many degrees to the TV Planes?
Definition
15
Term
The LA of the MTJ is how many degrees to the s Planes?
Definition
9 degrees
Term
describe the orientation of STJ axis
Definition
Plantar, Lateral, Posterior, to Medial, Dorsal, Anterior
Term
describe the axis of the 1st ray
Definition
45 degrees to sagittal and frontal
Term
describe the coupled motion of the 1st ray...
Definition
DF with inversion, PF with eversion
Term
What is the main ligament that restricts STJ INV and EVERS
Definition
Interosseous talocalcaneal
Term
which structures aids in the restriction of inversion of STj
Definition
lateral talocalcaneal lig, inferior extensor retinaculum, lateral collateral ligament
Term
what ratio of motion would be expectedd if the STJ axis was higher (say 60 degrees)
Definition
more ab/ad to inver/ever
Term
In OKC what are components of STJ pronation
Definition
DF Abduction Eversion
Term
In CKC motion, what are components of STJ pronation?
Definition
Adduction, Eversion, and PF
Term
define stj neutral>>>
Definition
stj neither pronated nor suppinated,

where stj inverts twice as much as everts,

maximum articular congruence,
Term
what is the minimum ROM required of the STJ for gait
Definition
4-6 degrees
Term
what ligaments support the MTJ?
Definition
Short and long plantar, spring, bifurcate
Term
which muscle provide dynamic stability of the MTJ
Definition
PT, PL, PB
Term
discuss orientation of R1 axis
Definition
Lateral anterior Plantar
Term
how much 1st MPJ DF is required for gait?
Definition
65 degrees
Term
how does 1st ray PF occur
Definition
PL stabilize midfoot, while intrinsics esp abductor hallucis produce active Plantar flexion
Term
ON examination you find more DF than PF of the 1st ray... what is the condition?
Definition
Metatarsus Primus Elevatus
Term
descrive MPJ DF...
Definition
1st 20-30 degrees is purely df, then R1 plantarflexes, which shifts the transverse axis dorsal and proximal which results in arthrodial motion of remainder of propulsion
Term
what is needed for normal R1 PF?
Definition
heel lift, stj suppination, normal sesamoids, and a 2nd met longer than 1st
Term
what is normal met length formula?
Definition
2>1>3>4>5
Term
what will happen with a short 1st met?
Definition
it will try to PF, this may result in stj pronation...
Term
what are implications of long 1st met?
Definition
inability to PF R1 leading to HAV or hallux rigidus/limitus
Term
describe motion at R5?
Definition
DF with eversion, PF with inversion
Term
Pt has a RF VL of 5 degrees, what will stj do?
Definition
pronate to end rom
Term
What are 2 causes of a rigid Pes planus?
Definition
tarsal coalition (peroneal spastic flatfoot) and COngenital Convex pes valgus (congenital vertical talus)
Term
what is the most common tarsel coalition of the stj?
Definition
calcaneonavicular
Term
what are some signs of a rigid pes planus from tarsel coalition?
Definition
local tenderness, decreased or absent ROM, muscle spasm, some degree of rigid flatfoot
Term
what are causes of peroneal spastic flatfoot?
Definition
  • Tarsel coalition (most common),
  • juvenile chronic arthritis,
  • osteochondral fractures,
  •  neoplasms and
  • idiopathic
Term
describe features of peroneal spastic flatfoot
Definition
peroneal muscle spasm
decreased STJ ROM and ankle ROM
valus appearance of foot
pain
antalgic, apropulsive, external rotated gait
Term
Rx of peroneal spastic flatfoot...
Definition
NSAID, footwear, orthotic therapy, immobilisation, common peroneal nerve block, surgery
Term
what diagnoses should be consider in male pt with flat feet, mental retardation
Definition
fragile x syndrome
Term
what are some causes of acquired flexible pes planus?
Definition
tendon failure(PT)
arthritis
trauma
neuromuscular Dz (polio)
spasticity
Term
Buldging of talar navicular region, calcaneal eversion and positive hellbings sign indicate which condition?
Definition
some form of flatfoot deformity
Term
PF at choparts in pes cavus is which type of cavus/
Definition
Forefoot Equinus
Term
What are some biomechanics causes of pes cavus/
Definition
FFVL, PFR1, uncompensated RFVR, ankle equinus, leg length descrepency
Term
what % of pes cavus cases are cause by nuero probs?
Definition
2/3
Term
what are causes of acute hallux limitus/rigidus?
Definition
traumatic synovitis
muscle spasm (usu FHB)
capsule contraction
marginal bone lipping
Term
What are rx of acute hallux rigidus?
Definition
heat, analgesia, ruberfacients, PMP padding, long shaft padding, cortisone injection
Term
discuss signs of Hallux limitus?
Definition
HK PMA 2-4, IPJ D1, lessor toe deformities
Term
signs of chronic rigidus?
Definition
cpma 4-5, IPJ D1, Lat D5, lessor toe deformities.

dorsal bursa
Term
note some foot wear signs of chronic hallux rigidus
Definition
heavy wear IPJ d1, tip of shoe
little PMA 1 wear
spin marks on PMA 5
Oblique creases to upper
Term
burning pain in HAV indicates what?
Definition
bursitis
Term
pain when barefoot in a patient with HAV indicates what?
Definition
degenerative Dz or lessor metatarsalgia
Term
what are causes of ankle equinus?
Definition
osseus,
spastic paralysis,
tonic spasm,
excess pronation,
weak DFers,
tigh hamstrings,
prolonged bed rest,
high heels,
Term
if ankle equinus is only present with knee extended which muscle is the problem>
Definition
Gastrocnemius
Term
if ankle equinus is present with knee flexed what are 2 causes?
Definition
soleous tightness (spongy end feel),
osseus deformity (soldi end feel)
Term
briefly, what are pathomechanics of ankle equinus... ie the result?
Definition
not enough AJ df, so get STJ pronation, also get OAMTJ DF (with midfoot collapse)
Term
what is the average cadence of men and women?
Definition
m:f 111 to 117
Term
average angle of gait?
Definition
7 degrees
Term
average distance between heel strike is
Definition
10 cms
Term
An PF at the navicular/cuneiform is called what?
Definition
Lesser tarsus equinus
Term
PF deformity at lisfrancs joint (tarsometatarsel joint) is called what
Definition
metatarsus equinus
Term
Who is your favourite Pod student?
Definition
Trent
Term
What is Trents current beer of choice
Definition
Hahn superdry
Term
what are clinica features of pes cavus
Definition
restrcited pronation, excessive shock with symtoms, ankle equinus, lateral ankle instability, digital contractures, tight plantar fascia, CPMA and callous on digits, pain
Term
ankle joint plantar flexion is limited by what?
Definition
anterior talfibular ligament, osseous block by posterior tubercle of calc
Term
ankle joint df is limited by what
Definition
triceps surae, post deltoid, post talofibular ligament
Term
what is the average STJ neutral position
Definition
0-3 degrees inverted (varus)
Term
how is MTJ supination limited primarily? (which structures)
Definition
plantar calcaneocuboid (short plantar), and calcaneocuboid component of bifurcate
Term
pronation of the rearfoot, and subsequent supination of the forefoot will place less tension on the plantar fascia, thus increasing 1st MPJ ROM..T or F
Definition
False, excessive proantion will, cause increase tension, leading to decrease available rom at 1st MPJ
Term
The peroneus longus Plantar flexes the 1st ray. t or false?
Definition
false, the PL stablizes the 1st ray, while the abductor hallucis actively PF it
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