Muscles
An example of this type of muscle is the sartorius.
What is a strap muscle?
The posterior cruciate ligament (PCL) resists this motion.
What is posterior tibial translation?
This artery, when palpated, can be used for pulse measurements.
What is the popliteal artery?
This bone acts as an anatomical pulley.
What is the patella?
This states that a force vector can be extended along its line of action to determine the moment arm.
What is the Principle of Transmissibility?
The quadriceps muscle do this at the knee.
What is deceleration of knee flexion(or acceleration of extension)?
The type 2 collagen fibers within the inner meniscus resist this.
What is compression?
The sciatic nerve splits into these 2 branches.
What are the tibial and common fibular nerves?
This femoral condyle is larger than the other.
What is the medial femoral condyle?
This position of center of mass provides a system with greater stability. (Higher or lower?)
What is a lower center of mass?
The vastus lateralis originates from here and attaches distally to the quadriceps tendon.
What is the greater trochanter and the lateral lip of linea aspera?
The posteriorlateral bundle of the ACL is more taut with this motion.
What is the extension?
This joint capsule layer has good innervation, while its inner layer has a good blood supply.
What is the stratum fibrosum?
Also known as "knock knees", this condition occurs when there is an increase in the tibiofemoral angle.
What is genu valgum?
Despite being mechanically disadvantageous, there more 3rd class levers in the body for this reason.
What is 3rd class levers allow for more ROM and mobility?
What is the action of the popliteus?
It unlocks the knee from extension by medially rotates the tibia on the femur.
How do the transverse and posterior meniscofemoral ligaments keep the menisci in place?
These ligaments create a hoop stress, which acts like a belt, to hold the menisci in place.
What is the femoral triangle and what is the order of blood vessels and nerves from most medial to lateral?
The triangle is made up by the sartorius, inguinal ligament, and adductor longus. The order goes vein (medial)-->artery-->nerve (lateral)
Explain the screw-home mechanism.
The tibia externally rotates on the tibia in open chain in the last 30 degrees of extension due to the shorter glide of the lateral condyle on the tibial plateau (acts like a pivot after glide)
Explain the concepts of creep and stress-relaxation.
Creep: deformation caused when a force is consistently applied over a prolonged period a time (change in stress under constant strain)
Stress-relaxation: decreased force to maintain the same tissue length (change in strain over constant stress)