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46 terms

joints

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gliding,angular,rotation
wut are the 3 types of mvmt?
gliding
1 flat bone slips ovr another
angular
changes the angles of the levers
rotation
rotates on axis.ie=atlas nd axis
flexion,extension,hyperextension,dorsiflexion,abduction,adduction,circumduction
wut are types of angular mvmts?
flexion
dec in angle;2 bones become closer
extension
inc the angle
hyperextension
beyond 180
dorsiflexion
toes up
plantar flexion
toes down
abduction
moving away from midline
adduction
towards bod
circumduction
draw a circle
supination,pronation,inversion,eversion,elevation,depression,oppositional
wut are the special mvmts?
supination
palm up
pronation
palm down
inversion
sole of ft turns medially(kick w/ inside of ft in soccer)
eversion
sole of ft turns laterally (2nd pos in ballet)
elevation
lift body
depression
bring down
oppositional
ok sign w/ thumbs
plane,hinge,pivot,condyloid,saddle joint,ball nd socket
wut are the types of joints?
plane
flat surfaces.ie-intercarpals,gliding mvmt
hinge
flexion nd extension (uniaxial).ie-phalanges nd elbow
pivot
atlas/axis.nd radioulnar
condyloid
all mvmts,2 oval ends (convex nd concave)
saddle joint
similar to condyloid (thumb)
ball nd socket
all mvmt (multiaxial).ie-shoulder nd hips
joint
sites where 2 + bones meet
synarthroses
wut functional joint class contains least mobile joints
fibrous joints
sutures
syndesmoses
fibres of lig-like interosseous membrane connecting radius nd ulna
gomphoses
peg in socket fibrous joint
cartilaginous joints
articulating bones by cartilage,lcks joint cavs
synchondroses
common type of cart joints.plate of hyaline cartilage unites bone.ie=epiphyseal plate
symphyses
artic surfaces of bones are covered w/ articular cart,acts as shock abosrbers nd has strength nd flexibility.ie=intervertebral joints
artic cart,joint cav,rtic capsule,synovial fluid,reinforcing lig
5 structural characterisitcs of synovial joints
artic cartilage
absorbs compression placed on joint nd keep bone ends from being crushes
joint cav
is potential space containing small amt of synovial fluid
artic capsule
made of dense irreg ct thts cont w/ periosteum of artic bones.external layer
synovial fluid
occupies all free spaces w/in joint cap.derived by filtration from blood flowing thru cappilaries in synovial mem
reinforcing lig
has intrinsic lig,which thickens parts of fibrous cap
bursae
flattened fibrous sacs lined w/ synovial mem nd contains thin film of synovial fluid
tendon sheaths
elongated bursa wrpped around tendon subjected to friction
shape of artic surface,ligs,muscle tone
3 natural factors tht stabilize synovial joints
nonaxial,gliding,angular,rotation
4 major mvmts tht synovial joints allow