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26 Cards in this Set

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  • Back
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WHAT IS THE PURPOSE OF JOINTS
to allow for some freedom of movement
HOW ARE JOINTS HELD TOGETHER
a. shape and size of articular surfaces
b. gravity
c. soft tissue (skin & fascia)
d. liagments
e. muscle & tendons
WHAT ARE THE CLASSIFICATION OF JOINTS
a. based on degree of mobility
b. based on structure of joints
WHAT IS SYNARTHROSIS
immovable
WHAT IS AMPHIARTHROSIS
slightly movable
WHAT IS DIARTHROSIS
freely movable
WHAT IS SYNDESMOSIS & GIVE EXAMPLE
two bones seperated by a space yet connected by fibrous ct (usually a ligament)
ex: distal tibiofibular joint
WHAT IS SUTURES & GIVE EXAMPLE
closely adjacent bones, connected by dense fibrous connective tissue
a. serrate: tooth like
ex: sagittal
b. squamosal: flat/overlapping
ex: squamosal
c. plane: square
ex: intermaxilla
d. synostosis: fused joint
ex: spenoidal occipital
WHAT IS GOMPHOSIS
peg & socket the articulation between the roots of all teeth and the alveoli of the mandible and maxilla
HOW MANY STRUCTURES OF JOINTS ARE THERE
a. fibrous joints
b. cartilagenous joints
c. synovial joints
WHAT IS CARTILAGENOUS JOINTS
bones are joined by cartilage
WHAT IS SYMPHYSIS & GIVE EXAMPLE
(grown together) fibrocartilage
ex: pubic symphysis, intervertebral discs, mental symphysis, manubriosternal, xiphisternal
WHAT IS SYNCHONDROSIS & GIVE EXAMPLE
(syn = with, condros = cartilage) hyaline
ex: temporary - epiphysial plates, permanent - first sternocostal joint
WHAT IS IN SYNOVIAL JOINTS & WHAT DOES IT DO
a. fibrous capsule surrounds joints creating a joint cavity
b. certain portion of the cavity are lined with synovium which secretes an oily fluid synovial fluid as a lubricant
c. some synovial joints have fibrocartilagenous discs (pads) which further protect articular surfaces
SYNOVIAL JOINTS ARE BROKEN DOWN IN FOUR JOINTS, WHAT ARE THEY
a. gliding or plane joints
b. uniaxial joints
c. biaxial joints
d. multiaxial joints
WHAT IS GLIDING OR PLANE JOINTS
articular surfaces are small & flat tend to glide across neighboring bone
ex: intercarpal, intertarsal, articular facets of vertebrae, acromioclavicular joints
WHAT IS UNIAXIAL JOINTS
one plane of action
a. hinge: bone move at right angles to each other
b. pivotal: rotation around long axis
a. ex: humeroulnar
b. ex: radioulnar (proximal)
WHAT IS BIAXIAL JOINTS
two planes of action
ex: metacarpal phalangeal, metatarsal phalangeal, humeroradial, first carpometacarpal
WHAT IS MULTIAXIAL JOINTS
many planes in action, greatest freedom of motion
ex: ball and socket of glenohumeral and hip joint
WHAT IS A BURSAE
a closed fibrous sac that is filled with synovial fluid
used as a cushion between structures
ex: tendons, ligaments, bone, skin
WHAT IS A HERNIATED DISCS
(slipped disc) nucleus pulposus of dics penetrates through fibrous cortex and presses against spinal nerve
WHAT IS AN ACUTE SCIATIC
referred as a pain down the back of the leg
WHAT HOLDS THE KNEE JOINT TOGETHER
held in place by two sets of ligaments, the collaterals medial & lateral and the cruxiates anterior and posterior
WHAT DOES THE FIBROCARTILAGENOUS DISCS DO
the medial and the lateral menisci provide buffer between condyles
WHAT DOES IT MEAN IF YOU HAVE WATER ON THE KNEE
build up of synovial fluid
WHAT IS THE ROLE OF AN OPPOSABLE THUMB
importance of joint design to manipulation of objects