Joint Structure and Function Flashcards
in a blank kinematic chain, blank joint segment is fixed from moving while blank segments are allowed to move on this stable blank segment
closed, distal, proximal, distal
in a blank kinematic chain, blank joint segment is free to move while blank segment provides stability
open, distal, proximal
structure of human joints determines blank of the joint
function
development of all anatomical tissues also determined in part by the blank applied to the tissues
stresses
agonist (effort) is always the blank vector in a fbd
longest
stability joints usually have blank designs with blank degrees of freedom
simple, one
most joint must serve a blank and blank function to different degrees
mobility, stability
two broad categories of arthroses (joints)
synarthroses, diarthroses
connections made via fibrous or cartilaginous connective tissue in these joints
synarthroses
three fibrous joints
syndesmoses, gomphoses, sutures
fibrous joint where bone is united via collagenous sutural ligament or membrane
sutures
sutures only occur in blank
skull
fibrous joint where surfaces are a peg in a whole…. only teeth
gomphoses
fibrous joint where bones joined directly by an interosseous ligament
syndesmosis
two types of cartilaginous joints
symphyses, synchondreses
symphysis joint is a blank cartilaginous joint covered by thin blank of blank cartilage and directly jointed by fibrocartilage in the form of disks or pads
secondary, lamina, hyaline
synchondrosis is a blank cartilaginous joint where blank cartilage joins the surfaces and permits growth and forms a bond at the ossifying center
primary, hyaline
example of synchondrosis joint
1st rib and sternum
two types of synarthroses
fibrous, cartilaginous
joints where ends of bony components are free to move and no connective tissue directly attaches to bones but has a joint capsule
diarthroses
two layers of joint capsule
stratum fibrosum, stratum synovium
outer layer of joint capsule that is type 1 collagen and poorly vascularized but richly innervated
stratum fibrosum
inner layer of joint capsule that has synovial fluid production and is highly vascularized and richly innervated
stratum synovium
thin film that covers inner layer of joint capsule (stratum synovium) and Articular cartilage
synovial fluid
synovial fluid reduced friction between blank
bony surfaces
synovial fluid nourishes the blank
articular cartilage
synovial fluid is like blood plasma but it has these two things
hyaluronic acid, lubricin (glycoprotein)
responsible for viscosity of synovial fluid and reduction of friction
hyaluronic acid
responsible for cartilage on cartilage lubrication in synovial fluid
lubricin
viscosity varies blank with joint velocity or rate of shear
inversely
property of synovial fluid that means semi solid fluid state
thixotropic
rapid joint movement means viscosity blank
decreases
slow movement means blank viscosity which causes blank resistance to motion
increases, more
1 plane of motion around 1 axis
uniaxial
two types of uniaxial diarthrodial joints
hinge, trochoid (pivot)
trochoid means blank joint
pivot
pivot joint example
median atlantoaxial joint
any joint with one surface convex while the other is concave
ovoid
hinge joint example
humeroulnar
two biaxial diarthrodial joints
condyloid, saddle
concave and convex surfaces slide over one another in 2 directions
condyloid joints
condyloid joint example
metacarpalphalangeal joint
joint where each joint surface is both convex in 1 plane and concave the other
saddle joint
saddle joint example
sc joint
two triaxial diarthrodial joints
plane, ball and socket
triaxial joint that is a variety of surface configurations and permit gliding between two or more bones
plane
convex ball and concave socket joint
ball and socket
motions of most synovial joints are typically measured with a blank
goniometer
movement of joint surfaces in relation to one another
arthrokinematics
arthrokinematics is looked at in pt by joint blank assessment
play
occurs in the direction of osteokinematic motion
roll
skate on ice or intervertebral facet joint motion osteokinematic motion
glide
marble spinning on table/radius on capitulum osteokinematic motion
spin
when a blank articular surface moves on a relatively stationary blank surface, blank movement of the surface occur in the same direction
concave, convex, roll and slide
joint in the frontal plane… the only motion that occurs are blank
superior/inferior
joint moving in the sagittal plane can be described as blank
anterior/posterior
joint moving in transverse plane motions are blank
medial/lateral
convex surface moving on a concave surface - roll and slide occur in blank
opposite direction
component of muscle force that is the part of a force that produces motion and is the y vector
rotary
part of a force that approximates the joint surfaces and is the x component
compressive