week 5- articulations Flashcards
Articulations (Joints)
Two bones interconnect
don’t always have to move
Range of motion
Full potential movement of joint
Synarthrosis
No movement
I.e- suture line
Amphiarthrosis
Very little movement
I.e- pubic symphysis and intervertebral joints
Diarthrosis
Free movement
I.e- Ball and socket
Articular cartilage
Protects end of bones that are articulating
Bones do not touch
Joint capsule
Surrounds joint
lined with synovial membrane
synovial membrane
secretes synovial fluid
synovial fluid functions
Lubrication
Nutrient distribution
Shock absorption
ligaments
attach bone to bone
damage is called sprain
tendons
attach muscle to bone
damage is called strain
bursa
fluid filled sac that reduces friction in tendon
meniscus
extra pad of fibrous cartilage found in knee
dislocation
movement beyond normal range of motion
Gliding joint
shearing motion
A-C joint, intercarpel/tarsal joint
hinge joint
flexion/ extension
elbow knee ankle
pivot joint
one bone rotates around other
C1-C2, proximal radioulnar
ellipsoid joint
flexion/extension adduction/ab circumduction
radiocarpal
saddle joint
thumb
ball and socket joint
most movement
hip and shoulder
gliding motion
movement along two axes in one plane
circumduction
basically arm doing circle
rotation
bone ends remain fixed and shaft rotates
left and right rotation
flexion
reduces angle between articular elements
lateral flexion
vertebral column bending to the side
dorsiflexion
flexion at ankle and elevation of sole
plantarflexion
flexion at ankle and elevation of heel
extension
increases angle between articulating elements
abduction
movement away from body midline
adduction
movement towards body midline
pronation
back of hand go out
supination
palm is turned out
opposition
movement of thumb towards palm surface
protraction/retraction
movement forward in anterior plane/ reverse of that
inversion
turning food inward
eversion
turning foot outward
depression
movement down of scapula
elevation
movement up of scapula
intervertebral discs composed of
annulus fibrosis
nucleus pulposus
annulus fibrosis
outer layer of fibrous cartlidge, attach to adjacent vertebrae
nucleus pulposus
soft core, provides shock absorbtion
slipped disc
annulus fibrosis puts pressure on nerves
herniated disc
nucleus pulpsous puts pressure on nerve
degenerative disc disease
wear and tear of disc
shoulder joint
greatest range of motion, most frequently dislocated
ball and socket synovial joint
formed by head of humerus and glenoid cavity of scapula
AC joint
gliding synovial joint, injury bis called shoulder separation
elbow joint
hinge joint involving humerus, radius and ulna
hip joint
ball and socket joint, formed by head of femur and acetabelum of hip bone
knee joint
hinge joint femur and tibia
ankle joint
hinge joint made up of tibia, fibula and talus
osteoarthritis
cummelutive wear and tear of joints due to age, injury, overuse obesity
Medial epicondyle of humerus
closest to middle, on side of “head”, bottom stick out part
lateral epicondyle of humerus
farthest from middle, bottom stick out Part on outside
head of humerus
head, ball
greater tubercle of humerus
by head of humerus, sticks up
lesser tubercle of humerus
below head of humerus
olecranon
bone on ulna that sticks up “C”
trochlear notch
notch in olecranon
head of radius
top of radius, flat part
radial tuberosity
below head, sticks out on front of radius
styloid process of radius
bottom of radius
scaphoid
first bone in hand,farthest from thumb
lunate
second bone under middle finger
triquetrum
second bone closest to pinky
pisiform
first bone closest to ulna
trapezium
closest to thumb bone
trapezoid
under pointer finger
capitate
under middle finger
hamate
under ring finger
greater trochanter of femur
outward part of top of femur
lesser trochanter of femur
small outward part on femur below head
head of femur
ball on femur
neck of femur
below ball of femur
lateral condyle of femur
on bottom, extends down, on side not of head
medial condyle of femur
on bottom, extends down, on side of head
lateral epicondlye of femur
on bottom, extends out, not on side of head
medial epicondlye of femur
on bottom, extends out, on side of head
tibial tuberosity
markings in front of tibia, up top
medial condyle of tibia
top of tibia, extend up, inside, not on side of fibula
lateral condyle of tibia
top of tibia, extends up, outside, some of fibula
medial malleolus of tibia
bottom tibia, inside, extends down
lateral malleolus of fibula
bottom fibula, extends down
head of fibula
top flat part
talus
second huge bone, on side of big toe
calcaneus
first huge bone connected to ankle
navicular
connected to talus, smaller bone
cuboid
connected to calcaneus