diarthroses

Question 1

what is diarthrosis also referred as

Answer 1

synovial joints

Question 2

what is the movement of a synovial joint dependent on

Answer 2

the shape

Question 3

descrbe diarthrosis regarding movement

Answer 3

they permit moderate to extensive movement

Question 4

what is in the cavity that diarthrosis posses

Answer 4

synovial fluid

Question 5

give an example of diarthrosis joints

Answer 5

tibiofemoral joint, apophyseal facet joint of the spine, the glenohumeral joint

Question 6

what are the 7 shapes of diarthrosis/synovial joints

Answer 6

hinge, pivot, ellipsoid, ball and socket, plane, saddle, condyloid

Question 7

what are the 7 elements that synovial joints must have

Answer 7

membrana fibrosa, ligaments, art. cartilage, synovial fluid, vascularisation, innervation, synovial membrane

Question 8

what are some elements that synovial joints could potentially have

Answer 8

variability in the synovial membrane, labrum, meniscus, fat pads

Question 9

what is the purpose of membrana fibrosa

Answer 9

consists of connective tissue that gives stability to the joint

Question 10

what is the purpose of ligaments in synovial joints

Answer 10

sometimes connect into the membrana fibrosa

Question 11

articular cartilage is present on one joint parrtner, true/ false?

Answer 11

false. art. cartilage is present on both joint partners

Question 12

what is the small layer of epithelial tissue called in synovial joints?

Answer 12

synovial membrane

Question 13

what is the purpose of the synovial membrane

Answer 13

synovial fluid production

Question 14

the art. Cartilage only goes as farther then the synovial membrane but the joint capsule cant extend a bit more, true or false?

Answer 14

false
the art. Cartilage only goes as far as the synovial membrane but the joint capsule can extend a bit more

Question 15

are the joint capsule and the synovial membrane’s blood vessels very well vascularised?

Answer 15

yes

Question 16

why is the joint capsule and synovial joint richly innervated

Answer 16

mainly for the purpose of proprioception meaning the joint gives intell to the brain about which position it stands and which position its moving

Question 17

what variability is a recesses in a synovial membrane

Answer 17

its a hollow indentation which enlarges the surface area of the capsule that allows for a greater range of movement within the joint)

Question 18

what variability is a a bursa synovialis in a synovial membrane

Answer 18

its an enclosed pouch of the synovial joint which decreases friction between 2 bones

Question 19

what variability is a Villi synovialis and plica synovialis in a synovial membrane?

Answer 19

the fibrous membrane remains at a normal distance but the synovial membrane changes the surface area which increases the surface area of the synovial membrane thus increasing synovial fluid production

Question 20

what is a labrum

Answer 20

the labrum is a cartilaginous extension of the joint which gives more stability and surface area

Question 21

what is the purpose of a meniscus in synovial joints

Answer 21

increases stability and range of motion as it does in the knee joint

Question 22

what is the purpose of fat pads in synovial joints?

Answer 22

besides storing fat as an energy source they also buffer forces and decreases friction

Question 23

what does functional degrees of freedom mean?

Answer 23

how far the joint can move in all 3 directions and whether the connective tissue might restrict or enhance the movement of the joint

Question 24

what is ligamentous restriction?

Answer 24

a joint is restricted by ligaments and if forced in a certain direction and the joint cant move any further the ligament would rupture causing tissue damage.