Knee: Anatomy 2 Flashcards
ACL/PCL blood supply
genicular artery
ACL/PCL are innervated by branches of this nerve
tibial nerve
ACL/PCL: 3 types of mechanoreceptors
- Ruffini corpuscles
- Pacinian corpuscles
- Golgi tendon organs
ACL originates from the posteromedial corner of the (medial/lateral) side of the (medial/lateral) condyle
medial side
lateral condyle
ACL inserts where?
anteromedial to intercondylar eminence of tibia
ACL: anterior/medial bundle
larger/smaller
smaller
ACL: anterior/medial bundle
taut in this position
throughout flex (and IR)
ACL: anterior/medial bundle
position tested in
flexion
ACL: posterolateral bundle
larger/smaller
larger/bulkier
ACL: posterolateral bundle
taut in this position
extension
ACL: posterolateral bundle
tested in this position
0-20˚ flexion
ACL bundles are named based on
attachments to TIBIA
ACL provides (%) resistance to anterior translation of the tibia on the femur at 30˚ and slightly less at 90˚
85%
PCL: originates from (lateral/medial) aspect of (lateral/medial) femoral condyle
lateral aspect
medial femoral condyle
PCL: inserts where
fossa posterior to tibial tubercle
PCL: (%) anterolateral bundle
95%
PCL: (%) posteromedial bundle
5%
PCL: anterolateral bundle is taut in this position
flexion
PCL: posteromedial bundle taut in this position
extension
PCL is the primary restraint to
posterior displacement of tibia on femur
PCL: common MOI
hyperflexion
dashboard injury
LCL attachment points
- lateral femoral epicondyle
- fibular head (with biceps femoris)
LCL is the primary restraint to
varus stress
In addition to being the primary restraint to varus stress, the LCL also limits
excessive tibial ER
