Leg Flashcards
Receives weight of the body from the femur
Tibia (medial)
Fibula (lateral, stick-like)
Contributes to the knee joint together with femur
Tibia (Fibula does not)
Largest and most complex joint. Acts as a hinge joint: flexion and extension.
Knee joint
Knee joint is structurally considered as…
Compound and bicondyloid
Connects the tibia and fibula
Interosseous membrane
Contributes to ‘locking’ of knee when standing
Rotation of femur to tibia (by knee joint)
3 joints surrounded by a single joint cavity
Patellofemoral
Lateral tibiofemoral
Medial tibiofemoral
What are the structures covered by the capsule of the knee joint?
- posterior and lateral aspects of the knee
- tibial and femoral condyles
What covers the capsule of the knee joint posteriorly?
2 heads of gastrocnemius (inserts to achilles tendon)
What structure enters the capsule and attaches to the lateral condyle of femur and lateral meniscus?
Tendon of popliteus
Capsule covers the anterior aspect of the knee. True or False?
False (It is covered by 3 ligaments: lateral patellar retinaculum, medial patellar retinaculum, patellar) cannot see their separation
What are the EXTRACAPSULAR LIGAMENTS of the knee joint?
FOAT
Tibial collateral ligament
Fibular collateral ligament
Oblique popliteal ligament
Arcuate popliteal ligament
What are the INTRACAPSULAR LIGAMENTS of the knee joint? (A-P)
Anterior cruciate ligament
Posterior cruciate ligament
Ligament: stout, flat band, part of the capsule. Large superficial part and smaller deep part.
Tibial (medial) collateral ligament
Prevents the knee from buckling INWARD
Tibial collateral ligament
OUTWARD - Fibular collateral ligament
Tendons that pass through Tibial collateral ligament. Collectively known as ‘pes anserinus’
Sartorius (superior)
Gracilis
Semitendinosus
Ligament: Round, cord-like structure, separated from the capsule of knee joint
Fibular (lateral) collateral ligament
Fibular or lateral collateral ligament is surrounded by what tendon?
Tendon of biceps femoris
Whatchu call the muscle that stabilizes the thigh?
Tensor fasciae latae
It is tensed by the tensor fasciae latae
Iliotibial tract (together with tendon of biceps femoris - Lateral aspect of knee joint)
Expansion of the tendon of semimembranosus. Reinforces the capsule agains torsional stress
Oblique popliteal ligament
Arches upward and medially over the popliteus from the head of the fibula separating the capsule from FCL
Arcuate popliteal ligament
Deep within this ligament, you can see where tibia and fibula meet
Lateral collateral ligament
2 ligaments that prevent excessive movement between tibia and fibula
Medial tibiofibular ligament
Lateral tibiofibular ligament
Each of these ligaments runs from proximal tibia to distal femur
Cruciate ligaments
Both cruciate ligaments arise from this ridge
Intercondylar eminence
Prevents anterior displacement of tibia or posterior displacement of femur
Anterior cruciate ligament
Posterior cruciate ligament - prevents posterior displacement of tibia or anterior displacement of femur
Receives slips from the lateral menisci
Posterior cruciate ligament
Deepens the articulation between tibia and fibula. Helps in shock absorption during running and jumping.
Lateral and Medial menisci
Meniscus attached peripherally to the capsule - more prone to injury
Medial meniscus
What attaches the lateral meniscus to femur?
Meniscofemoral ligament
What separates the lateral meniscus from capsule - less prone to injury
Popliteal tendon
Range of knee flexion and extension
Flexion 0-130
Extension 120-0
Flexion at the knee
L4, L5, S1, S2, hamstrings
Extension at the knee
L2,L3, L4, quadriceps
Assesses the integrity of LCL
Varus Stress Test
+) pain & gapping (normal @ 30* ; abnormal 0*
Assesses the integrity of MCL
Valgus stress test
Test for cruciate ligaments wherein you stabilize thigh and knee then push the tibia
Lachman test
Anterior displacement - ACL injury
Posterior displacement - PCL injury
Test for cruciate ligaments wherein you flex the knee and stabilize the foot.
Drawer test
Mov’t anteriorly - ACL injury
Mov’t posteriorly - PCL injury
What forms the ankle joint?
Tibia + Talus
It stabilizes the ankle joint
Fibula
Hinge joint that allows dorsiflexion and plantar flexion only
Ankle joint
Stabilizes the ankle joint medially
Deltoid (medial) ligament - large strong triangular
Laterally -lateral collateral ligament
(4) ligaments comprising the MEDIAL COLLATERAL LIGAMENT (T T AT PT)
Tibionavicular
Tibiocalcaneal
Anterior tibiotalar
Posterior tibiotalar
Apex of MCL is attached to?
Medial malleolus
Base of MCL is attached to? Front & back
Front - tuberosity of navicular bone
Back - medial tubercle of talus
(3) ligaments comprising the LATERAL COLLATERAL LIGAMENT (AT PT C)
Anterior talofibular
Posterior talofibular
Calcaneofibular
Range of motion of ankle joint
Dorsiflexion 0-35
Plantar flexion 0-45
Dorsiflexion and Plantar flexion of the ankle
Dorsiflexion - L4, L5, anterior tibialis
Plantar flexion - S1, gastrocnemius, soleus
Test for ankle joint wherein you stabilize the neck and pull on calcaneous
Anterior drawer’s test
Test for injury of lateral ligaments of ankle joint
Lateral talar test