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Anatomy wk 7
articulations
49
Anatomy
Undergraduate 3
06/18/2015

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Term
articulation
Definition
point of contact between bones
Term
Joints can be classified by what two schemes?
Definition
structural and functional
Term
structural classification: joints are named according to what classification?
Definition
presence of fluid-filled joint capsule (synovial joint)
and
type of connective tissue that joins bones together(fibrous or cartilaginous joints)
Term
functional classification: joints are named according to what classification?
Definition
the degree of movement allowed
Term
3 types of functional joints
Definition
Synarthroses, amphiarthroses, diarthroses
Term
synarthroses
Definition
immovable joints (sutures of the skull)
Term
amphiarthroses
Definition
slightly movable (public symphysis)
Term
diarthroses
Definition
freely movable (shoulder joint)
Term
fibrous joints (synarthroses)
Definition
bones of joints fit together closely, thereby allowing little or no movement
Term
3 types of fibrous joints
Definition
syndesmoses, sutures, gomphoses
Term
sutures
Definition
found only in the skull; teeth-like projections from adjacent bones interlock with each other
Term
gomphoses
Definition
between the root of a tooth and the alveolar process of the mandible or maxilla
Term
Cartilaginous joints (amphiarthroses)
Definition
bones of joints are joined together by hyaline cartilage or fibrocartilage; allow very little motion
Term
two types of Cartilaginous joints
Definition
synchondroses (between ribs), symphyses (spine and pubic)
Term
synovial joints (diarthroses)
Definition
freely movable joints
Term
7 structures of synovial joints
Definition
joint capsule, synovial membrane, articular cartilage, joint cavity, menisci, ligaments, bursae
Term
Joint capsule
Definition
sleeve-like casing around the ends of the bones that binds them together
Term
joint cavity
Definition
small space between the articulating surfaces of the two bones of the joint
Term
menisci (articular disks)
Definition
pads of fibrocartilage located between articulating bones
Term
bursae
Definition
synovial membranes filled with synovial fluid; cushion joints and facilitate movement of tendons
Term
ligaments
Definition
connect bone to bone: strong cords of dense, white, fibrous tissue that hold the bones of a synovial joint more firmly together
Term
three types of synovial joints
Definition
uniaxial, biaxial, multiaxial
Term
uniaxial joints
Definition
permit movement around only one axis and only one plane
Term
2 types of uniaxial joints
Definition
hinge joints, pivot joints
Term
pivot joints
Definition
a projection of one bone articulates with a ring or notch of another bone
Term
2 types of biaxial joints
Definition
saddle joint, condyloid (ellipsoidal) joints
Term
saddle joints
Definition
synovial joints in which the articulating ends of the bones resemble reciprocally shaped miniature saddles; only example is the thumb
Term
condyloid (ellipsoidal) joints
Definition
synovial joints in which a condyle fits into an elliptical socket
Term
two types of multiaxial joints
Definition
ball and socket, gliding joints
Term
ball and socket joint
Definition
(spheroid) joints: most moveable joints; the ball-shaped head of one bone fits into a concave depression
Term
gliding joints
Definition
relatively flat articulating surfaces that allow limited gliding movements along various axes.
Term
humeroradial joint
Definition
in the elbow, example of synovial joint, lateral articulation of the capitulum of the humerus with the head of the radius (cap on head)
Term
knee joint
Definition
hinge joint, type of synovial joint, largest and one of the most complex and most frequently injured joints
Term
sprain
Definition
injury to a ligament
Term
strain
Definition
injury to a tendon
Term
tendons
Definition
connect muscle to bone
Term
flexion
Definition
decreases the angle between bones; bends or folds one part on another
Term
extension
Definition
increases the angle between bones/body parts; returns a part from its flexed position to its anatomical position
Term
hyperextension
Definition
stretching or extending part beyond its anatomical position
Term
plantar flexion
Definition
increases the able between the top of the foot and the front of the leg
Term
dorsiflexion
Definition
decreases the angle between the top of the foot and the front of the leg
Term
abduction
Definition
moves a part away from the median plane of the body
Term
adduction
Definition
moves a part toward the median plane of the body
Term
inversion
Definition
turning the sole of the foot inward
Term
eversion
Definition
turning the sole of the foot outward
Term
protraction
Definition
moves a part forward
Term
retraction
Definition
moves a part backward
Term
osteoarthritis
Definition
degenerative joint disease; most common non-inflammatory disorder of movable joint; caused by wear and tear
Term
rheumatoid arthritis
Definition
a form of systemic autoimmune disease that involves chronic inflammation of many different tissues and organs of the body
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