Lower Leg and knee Flashcards
What are the contents of the popliteal fossa?
popliteal artery / vein
tibial nerve
common fibular (peroneal) nerve
Lesser saphenous vein
What structures make up the boundaries of the popliteal fossa?
Medial boarders : semimembranosis M. /Semitendinosis and Medial head of gastrocnemius
Lateral boarders: biceps femoris and lateral head of gastrocnemius
What structures make up the boundaries of the popliteal fossa?
Medial boarders : semimembranosus M. and Medial head of gastrocnemius
Lateral boarders: biceps femoris and lateral head of gastrocnemius
What type of injury / force causes the “terrible triad”?
Lateral (valgus) injury
rotational injuires cause what kind of soft tissue knee injury
Meniscus and cruciate lig tears
Rotational injuries can cause damage to?
The menisci
In the case of a DVT, the greater saphenous vein is considered a deep vein t/f?
True: though it is technically superficial it drains into the deep femoral vein making it deep.
The medial border of the popliteal fossa is comprised of______
Semimembranosus and semitendonosus
The contents of the popliteal fossa:
Popliteal artery, vein, and the tibial nerve
What soft tissue injuries of the knee are likely present along with a bone bruise?
ACL, PCL, and meniscal tears
What nerve supplies the muscles that attach to the achilles tendon?
Tibial nerve
Anteromedial support to the knee: SGT of SGT FOS
Sartorius
Gracilus
SemiTendonosus
Posteromedial support of the knee (2)
Semimembranosus
Medial head of gastrocnemius
Anterior support of the knee (2)
Quad femoris tendon
Patellar lig
Anterolateral support of the knee (1)
Iliotibial tract
Posteromedial support?
Semimembranosus
Medial head of gastroc
Heel walking is related to what nerve roots?
L4/ L5 (dorsiflexion of ankle L4 ) (great toe extension L5)
Toe walking is related to what nerve roots?
S1 (plantar flexion)
foot eversion is due to what muscles of the lower leg? and this is supplied by what nerve?
fibularis longus and brevis. innervation from superficial fibular/ peroneal nerve
dorsiflexion and inversion of the foot is due to what muscles of the lower leg? and what nerve supplies this ?
Tibialis anterior
extensor hallucis longus
Extesnor digitorum longus
Fibularis tertius
innervation : Deep fibular/ peroneal nerve
O’Donoghue’s “Terrible Triad” involves which structures?
ACL, MCL, medial meniscus
But he says LM is more common
What type of injury / force causes the “terrible triad”?
Lateral (valgus) injury
A 16 yo female patient is playing in a soccer game when she attempts to switch direction. She hears a “pop” and immediately has effusion in her knee. Most likely Dx?
ACL tear
Rotational injuries can cause damage to?
The menisci
the ankle joint is most stable when:
a. plantar flexed
b. dorsi flexed
c. inverted
d. everted
b. dorsi flexed
The deltoid ligament has four parts:
posterior tibiotalar
tibicalcaneal
tibionavicular
anterior tibiotalar
The tarsal tunnel from anterior to posterior
Tom, Dick , And Very Nervous Harry
Tib posterior m flexor Digitorum longus m posterior tibial Artery tibial Vein tibial Nerve flexor Hallucis longus m
A valgus force applied to the knee would likely damage which ligament of the knee?
MCL
A varus force would likely damage which ligament of the knee?
LCL
A 30 yo male is bought to the ER after and MVA. He is c/o Lt knee pain after his knee hit the dashboard. Which ligament do you suspect could be injured and how would you test?
PCL
Posterior draw
or Sag sign
A normal / uninjured meniscus will have a ______ appearance on MRI?
Bowtie appearance
You find a mass in the posterior knee. What kind of cyst is found here?
Baker’s cyst
Name the anterolateral lateral supporting structures of the knee?
IT band
Name the posterolateral supporting structures of the knee?
Biceps femoris
Lateral head of gastroc
Politeus
plantaris
the Lateral supporting structure of the knee?
LCL
These muscles provide anteromedial support for the knee
SGT –>
Sartorius
Gracilis
Semitendinosus
Posteromedial support?
Semimembranosus
Medial head of gastroc
Medial support for the knee?
MCL
Anterior support for the knee?
Quads femoris tendon
Patellar ligament
Hamstrings (SM, ST, biceps femoris causes what motion at the knee?
Flexion
The Quads (rectus femoris, vastus lateralis, medialis and intermedius) cause what motion at the knee?
Extension
The gastrocnemius, gracilis, sartorius, and popliteus cause what motion at the knee?
Flexion
Tensor fascia lata is a knee ______
Extensor