Joints and Connective Tissues + Thigh, Leg and foot 1 Flashcards
What are the types of joints? (based on mobility)
Synarthroses (no movement) eg suture joints in skull
Amphiarthroses (Slightly moveable) eg vertebrae, and pubic symphysis
Diarthroses (Freely moveable) eg. elbow and shoulder
What are the contents of a typical diarthroses joint?
Articular cartilage
Articular capsule
Joint cavity containing synovial fluid
Synovial membrane
Synovial fluid (separates the articular cartilages)
In some joints
Menisci
Fat pads (provide shock absorption)
Intracapsular ligaments (ACL, PCL, etc)
Extracapsular ligaments (Can repair themselves due to blood supply)
What parts of the bone does the articular capsule connect?
The periostea of both bones
What happens to bone on the Load/deformation curve after the yield point?
It is no longer able to return to its original shape after deformation.
What is the region of the curve where the bone can return to its original shape after applying the load?
The elastic region
What is the region of the curve where the bone cannot return to its original shape after applying the load (the yield point)?
The plastic region
What structures do all connective tissue share?
Collagen and elastic fibers
How are the stress/strain curves different for elastin and collagen?
Collagen can resist stress until the point of failure where the level of deformation is too much to handle (8% deformation is the point of failure which isn’t very high compared to elastic fibers)
Elastin is much like a rubber band where it can be deformed significantly without providing much resistance until it approaches the point of failure
What do tendons do?
They join muscle onto bone/fascia. Inelastic tissue ensures transfer of tension to effect movement.
What are tendons made of?
Mostly collagen (99% with only 0.8% elastin)
How is collagen arranged in tendons? Why is this important?
Collagen is arranged in parallel bundles. This allows tendons to be very hard to deform.
What are ligaments made of?
Also mostly collagen (~90%) but not only arranged in parallel which makes them somewhat resistant to deformation.
What are the parts of the femur?
Head
Neck
Body
What does the teres ligament of the femur do?
Carries artery and vein to head called the fovea capitis
What are the bumps on the top of the body of the femur called?
The greater and lesser trochanter
What are the ridges between trochanters called?
The intertrochanteric line anterior
Intertrochanteric crest posterior
What does the intertrochanteric crest contain? What is the purpose of this bump?
The quadrate tubercle (Connected to by the quadratus femoris)
What is the linea aspera?
Posterior line that descends the shaft of the femur
What are the lines that meet at the linea aspera called?
From the greater trochanter: Gluteal tuberosity (Attachment of gluteus maximus)
From the lesser trochanter Pectineal line (from adductor muscle)
From the medial side: Spiral line
What is the lateral condyle?
On the inferior head of the femur (the one that forms the knee joint) lateral side which forms the lateral epicondyle which contains various ligaments and articulations
What is the medial condyle?
On the inferior head of the femur (the one that forms the knee joint) medial side which forms the medial epicondyle which contains various ligaments and articulations