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QuestionAnswer
synarthroses immovable joints
amphiarthroses slightly movable joints
diarthroses freely movable joints
fibrous joints bones joined by fibrous tissue,dense fibrous connective tissue, no joint cavity
3 types of fibrous joints sutures syndesmoses gomphoses
sutures found only in the skull. "seams" interlock bone
syndesmoses bones are connected exclusively by ligaments,cords or bands of fibrous tissue
gomphoses peg-in-socket fibrous joint. tooth is only ie:
cartilaginous joint articulating bones are united by cartilage. not highly movable
2 types of cartilaginous joints synchondroses and symphyses
synchondrosis a joint in which the bones are united by hyaline cartilage
symphyses a joint in which the bones are connected by fibrocartilage
synovial joint freely movable joints in which the articulating bones are separated by fluid-containing joint cavity.
articulations another term for joint
synarthroses what functional joint class contains the least mobile joints?
symphyses/synchondroses of sutures, symphyses/synchondroses, which are cartilaginous joints?
the more stable the joint the less mobile it is how are joint mobility/stability related?
6 features of synovial joints articular cartilage/joint cavity/articular capsule/synovial fluid/reinforcing ligaments/nerves and blood vessels
bursae flattened fibrous sacs lined with synovila membrane/containing synovial fluid. occur where bones rub together
tendon sheath elongated bursa that wraps around tendon subjected to friction
fibrous capsule/synovial membrane what are 2 layers of articular capsule?
help to reduce friction during joint movement how do bursae/tendon sheaths improve joint function?
muscle tendons that cross the joint what factor is most important in stabilizing synovial joints?
help keep joint cartilages nourished and lubricates the joint surfaces what is importance of weeping lubrication?
flexion bending movement on sagittal plane that DECREASES the angle of joint/and brings bones closer together ie: bending knee
extension movement along sagittal plane that INCREASES the angle of bones and straightens a limb. ie:straightening knee
circumduction moving limb so it describes a cone in space
rotation turning of bone around its own long axis. turning head left to right
supination "turning backwards" movements of radius around ulna
pronation "turning forward" movements of radius and ulna
dorsiflexion lifting foot so it is superior surface approaches the shin
plantar flexion depressing the foot (pointing toes)
elevation lifting a body part superiorly
depression moving elevated part inferiorly
opposition movement when you touch your thumb to the tips of the other fingers on the same hand
plane joints SJ: surfaces are flat and allow only short NONAXIAL gliding movements ie; intercarpal/intertarsal joints. between vertebral articular processes
hinge joints SJ:cylindrical end of one bone conforms to a trough-shaped surface on another.
hinge joints SJ: motion is alon a single plane. UNIAXIAL: permits flexion/extension only ie:knee/elbow
pivot joints SJ: rounded end of one bone conforms to a "sleeve" of another. UNIAXIAL rotation of one bone around its own long axis. ie: head saying NO
condyloid joints SJ: one bone fits into a complementary depression in another. both surfaces are oval
condyloid joints SJ: BIAXIAL permits all motions ie:wrist
saddle joints SJ: resemble condyloid joints,but allow greater freedom of movement. ie: twiddling your thumbs
ball/socket joints SJ:spherical head of one bone articulates w. the cuplike socket of another.
ball/socket joints SJ: MULTIAXIAL joints/ are most freely moving ie:shoulder/hip only
hinge/pivot which joints are uniaxial? hinge condyloid saddle or pivot
Created by: 1607566894
 

 



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