Consists of an alpha motor neuron and all the fibers it innervates
What is a motor unit
100
How many menisci, shape of menisci, and function
What is medial & lateral, C-shaped & 4/5 circle, & enhance joint congruence, distribute forces, reduce friction, & shock absorbers
100
At 135 flexion the petall makes contact with these two surfaces
What is lateral & odd facets
100
This structure lies deep to patellar tendon
What is infrapatellar (Hoffa's) fat pad. Also anterior and posterior suprapatellar fatpads lie posterior to the quad tendon and anterior to the distal femoral epiphysis.
200
sarcolema
What is single muscle fiber
200
Fiber types
What are Type I (slow), Type II A(moderate), Type II X(fast)
200
Anteriorly, the menisci are connected by the ____ ligament & connected to the patella by the ____ ligaments
What is transverse ligament & patellomeniscal ligaments
200
This condition consists of a markedly long tendon which produces an abnormally high position of the patella
What is patella alta
200
The failure of the synovial membrane to become fully reabsorbed results into specific folds know as what?
What are plicae
300
thick myofilaments of a myofibril
What actin and myosin
300
Activated by either and active muscle contraction or by excessive passive stretch
What is Golgi Tendon Organ
300
Attachment of menisci to the patella
What are the patellomeniscal ligaments
300
This movement of the patella occurs during medial rotation of the femur on the tibia
What is medial tilt
300
The assessment of the net pull of the quadriceps and the patellar ligament
What is the Q angle
400
Molecules of the globular protein ____ are found in notches between the two actin strings, and the protein ____ protein in attached to each molecule
What are troponin and tropomyosin
400
An AP initiates release of Ca2++ and the ions cause troponin to reposition tropomyosin so that receptor sites on the actin are free and the head groups of the myosin can bind with actin.
What is Sliding Filament Theory
400
The medial meniscus is attached firmly to the joint capsule through a medial thickening that extends distally from the femur to the tibia
What is the MCL
400
When the knee is extended the patella is at ___ pole
When the knee is flexed the patella is at ___ pole
What is inferior & superior
400
This structure is located between the skin and the anterior surface of the patella and allows for free movement of the skin over the patella during flexion and extension.
This structure lies inferior to the patella between the patellar tendon and the overlying skin.
What is the prepatellar bursa & the infrapatellar bursa
500
Large protein that is attached along the thick filament and spans the gap from the thick filament to the Z discs
What is titin
500
Active motor units discharge at higher frequencies to generate greater tensions
What is rate coding
500
The anterior and posterior horns of the medial meniscus are attached to the ___ and the ___. And these two muscles attach to the medial and lateral menisci ____ &_____
What is ACL, PCL, semimembrinosus, & politeus
500
Limitation of the distal glide of the patella on the femur would result in limitation of what movement?
What is knee flexion
500
Which one of these is NOT a function of the ligaments:
Anterior/posterior displacement of the tibia beneath the femur.
Excessive knee extension
Distribute weight-bearing forces
Resist varus and valgus stresses