tendons and ligaments Flashcards
What is the basic mechanical behaviour of tendons and ligaments?
viscoelastic
Approximately how far can the anterior cruciate ligament be elongated before rupturing completely?
7mm
which inorganic component gives bones its characteristic hardness and rigidity
calcium phosphate
cortical bone is stiffer than wood but more flexible than glass, aluminium and steel
y
the neutral axis is the line through a structure along which no distortion occurs
y
what is a greenstick fracture?
one side broken, other side buckled
how is articular cartilage attached to bone?
Articular cartilage is attached to bone by means of the collagen fibrils that extend from the deep zone into the underlying bone tissue
what is creep?
an increase in strain under a constant stress
In which plane does the greatest range of motion of the hip joint occur?
sagittal
what is abductor muscle activity required to do in unilateral stance?
During unilateral stance (Figure 6B) abductor muscle activity is required to stabilise the position of the body.
Name the two articulations that comprise the knee joint.
patellofemoral, tibiofemoral
What type of bone is the patella?
sesamoid
why does the knee not always rotate about the same axis?
the condyles are not perfectly circular, and restrictions imposed by the ligaments
What are the two main functions of the menisci?
shock absorbers and force distributors
