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27 terms

Knee, lower leg, ankle biomechanics

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modified hinge
tibiofemoral joint type
modified plan joint
patellofemoral joint
femoral condyles of the knee are more curved posteriorly, good for flexion (so tibia can roll into the rounded part), and less curved anteriorly which is good for weight bearing. medial condyle is more curved than lateral condyle, which is why the knee automatically rotates during flexion/extension
describe knee biomechanics
the femoral condyle rolls 15-20 degrees on the tibial condyle, then glides, producing a combined "rolling-gliding" movement.
describe the movement of the femoral condyle on the tibial condyle
protects the nee and quad tendon, most stable in flexion, least stable in lateral rotation
patella function
c shaped intra articular fibrocartilage discs. move with different movements of the knee. if mmt too fast may become crushed or torn.
menisci
quadriceps, and inserts on tibial tuberosity
patellar ligament is viewed as a continuation of the
biceps femoris, semimembranosus, semitendinosus, gracilis, sartorius, popliteus, gastroc, plantaris, tensor fascia latae
knee flexion
quads: rectus femoris, vastus medialis, vastus intermedius, vastus lateralis
knee extension
hinge
tibiofibular, talocrural, are this type of joint
ball and socket
subtalar and talocalcaneonavicular joint is
condyloid/ellipsoid
metatarsophalangeal joint type
hinge
interphalangeal joint type
gastroc, soleus, plantaris, peroneus longus, peroneus brevis
plantar flexion muscles
peroneus longus, peroneus brevis
eversion and plantar flex
tibialis posterior, flexor digitorum longus, flexor hallucis longus
medial foot muscles
extensor digitorum longus, extensor hallicus longus, peroneus tertius
foot dorsiflexors
flexor digitorum brevis and flexor hallucis brevis
toe flexors
adduction of toes
plantar interossei
abduction of toes
dorsal interossei
toe flexion
plantar and dorsal interossei
toe extension
lumbricals (dorsal)
toe flexion
plantar lumbricals
50
AROM flexion/plantar flexion
20
AROM extension/dorsiflexion
45-60
AROM supination/inversion
15-30
AROM pronation/eversion