Day 5 (Diarthrosis common features; Diarthrosis classification) Flashcards
Which theory of joint lubrication implies a loss of fluid from the cartilage into the joint space during compression results in increased viscosity of the synovial fluid?
weeping theory
Which theory of joint lubrication implies water loss from the synovial fluid increases viscosity of the remaining synovial fluid?
boosted theory
Which theory of joint lubrication implies an adsorption of lubricant onto cartilage surfaces is responsible for the low-friction observed during movement?
boundary theory
What are the properties of synovial fluid?
it is yellow-white, viscous, slightly alkaline and tastes salty
Which substance in synovial fluid was first thought to be responsible for its viscosity and lubricating behavior?
hyaluronate
What substance of synovial fluid has been proposed to be responsible for its viscosity and lubricating behavior?
lubricin
What is a complex synovial joint (diarthrosis)?
within the simple joint or the compound joint, the articulating surfaces are separated by an articular disc (intra-articular disc) or meniscus
What morphological classification of synovial joints is classified as nonaxial?
plane (diarthrosis arthrodia)
What morphological classifications of synovial joints would be classified as uniaxial?
hinge (diarthrosis ginglymus) and pivot (diarthrosis trochoid)
What morphological classifications of synovial joints would be classified as biaxial?
(diarthrosis) bicondylar, (diarthrosis) condylar, (diarthrosis) ellipsoidal and saddle (diarthrosis sellar)
What morphological classification of synovial joints would be classified as multiaxial?
ball and socket (diarthosis enarthrosis), (diarthosis spheroidal), (diarthrosis cotyloid) are all classifications given to the same type of joint
What are the examples of synovial pivot (diarthrosis trochoid) joints?
median atlanto-axial joint and proximal radio-ulnar joint
What are examples of diarthrosis condylar or diarthoris bicondylar joints?
temporomandibular joint and femur-tibia joint of the knee
What are examples of diarthosis ellipsoidal joints?
radiocarpal joint of the wrist, metacarpo-phalangeal joints of the hand, metatarsal-phalangeal joints of the foot and the atlanto-occipital joint of the vertebral column
What are examples of synovial saddle (diarthrosis sellar) joints?
carpometacarpal joint of the thumb, talocrural joint of the ankle and the calcaneocuboid joint of the foot
