Chapter 8 Articulations Flashcards
Joints are the ________ part of the skeleton.
Weakest
Definition of articulation is
the site where two or more bones meet
Functions of joints: give the skeleton_________ and _______ the skeleton _________.
mobility
hold
together
Two kinds of classifications of joints are
structural and functional
Three structural classifications are
fibrous, cartilaginous, and synovial
Fibrous means
collagen fibers
Cartilaginous means
cartilage
Synovial means
fluid
Three functional classes of joints are (SAD)
Synarthroses
Ampiarthroses
Diarthroses
Synarthroses means
immovable
Ampiarthroses means
slightly movable
Diarthroses means
freely movable
Functional classification is based on the _______by the joint.
amount of movement allowed
Three types of fibrous joints are
sutures
syndemoses
gomphoses
With fibrous structural joints, the bones are
joined by fibrous tissues
There is no joint cavity with
fibrous structural joints
Most fibrous structural joints are
immovable
Sutures occur only between
the bones of the skull
Sutures are comprised of
interlocking junctions
Sutures are completely filled with
connective tissue fibers
Sutures bind bones tightly together, but allow for
growth during youth
In middle age, bones
fuse together
Sutures
Structural:_________
Functional:_________
Fibrous
Synarthroses
Syndemoses bones are connected by a
fibrous tissue ligament (interosseous membrane)
With syndemoses movement
varies from immovable to slightly movable
Syndemoses examples include the connection between what bones
tibia and fibula
radius and ulna
Syndemoses
Structural:_________
Functional:_________
Fibrous
Synarthroses and Amphiarthroses
Gomphoses is the ________________
peg-and-socket fibrous joint only between a tooth and its alveolar socket
With gomphoses the fibrous connection is the
periodontal ligament
Cartilaginous joints are articulating bones that are
united by cartilage
Cartilaginous joints lack
joint cavity
Two types of cartilaginous joints are
synchondroses and symphyses
Synchondroses is a _______________ that unites the bones
bar or plate of hyaline cartilage
All synchondroses are
synarthrotic
Examples of synchondroses are
epiphseal plate in children and the
joint between the costal cartilage of the first rib and the sternum
Synchondroses:
Structural:_________
Functional:_________
Cartilage
Synarthrotic
Symphyses is ______________ that covers the articulating surface of the bone and it’s fused to an intervening pad of fibrocartilage.
hyaline cartilage
Symphyses joints are
amphiarthrotic
Symphyses joints are designed for
strength and flexibility
Symphyses:
Structural:_________
Functional:_________
Cartilage
Ampthiarthoses
Examples of symphyses joints include
intervertebral joints and the pubic symphysis of the pelvis
Synovial joints are those joints in which the articulating bones are
separated by a fluid-containing joint cavity
All synovial joints are
freely movable diarthroses
Synovial Joints:
Structural:_________
Functional:_________
Synovial
Diarthrosis
Examples of synovial joints are
all limb joints and most joints of the body
Synovial joints have all of the following:
articular cartilage, joint (synovial) cavity, articular capsule, synovial fluid, reinforcing ligaments
Be able to list and label picture on page 254
labels
Articular cartilage covers
bone surfaces
Joint (synovial) cavity is filled with
synovial fluid
Articular capsule is
double layered
two layers of articular capsule are
external layer and synovial membrane
Synovial fluid is in
free spaces of joint capsule
Synovial fluid is derived from
filtered blood plasma and hyaluronic acid
Synovial fluid reduces
friction
The external layer of the articular capsule is a ______, ______ and _______ capsule.
tough, flexible, fibrous
The external layer of the articular capsule is _________ connective tissue
dense irregular
The synovial membrane is ________ connective tissue
loose
The synovial membrane lines the ________ _______ internally and covers ________ _______ surface.
fibrous capsule
internal joint
Reinforcing ligaments of a synovial joint are
parts of fibrous capsule or outside the capsule
Friction Reducing structures are ______ and _______.
bursae and tendon sheaths
Bursae is
flattened, fibrous sacs lined with synovial membrane
Tendon sheath is
the elongated bursa that wraps completely around the tendon
Friction reducing structures, bursae and tendon sheaths are common where?
where ligaments, muscles, skin, tendons or bones rub together
The two muscle attachments across a joint are
origin and insertion
Origin is the attachment to the
immovable bone
Insertion is the attachment to the
movable bone
Synovial joints: range of motion
4 words
nonaxial
uniaxial
biaxial
multiaxial
Nonaxial is
slipping movements only
uniaxial is
movement in one plane
Biaxial is
movement in two planes
multiaxial is
movement in or around all three planes
Angular movement is
flexion/extenstion dorsiflexion and plantar flexion abduction and adduction circumduction hypertension
Flexion is
bending movement that decreases the angle of the joint
Extension is
the reverse of flexion, it increases the angle of the joint
dorsiflexion and plantar flexion is the
up and down movement of the foot
abduction is
the movement away from the midline
adduction is
the movement toward the midline
circumduction is the
movement in a cone shape in space
hypertension is
movement beyond the anatomical position
Rotation is
the turning of a bone around its own long axis
examples of rotation are
between the first two vertebrae and the hip and shoulder joints
Supination is
anatomical position, hands up (holding a soup bowl)
Pronation is
hands down
inversion is
sole of foot turned medially
eversion is
sole of foot turned laterally
protraction is
the jaw jutted forward
retraction is
the jaw pulled back
elevation is
scapula raising when shrugging
depression is
down (depressed)
opposition is
the thumb only to touch other fingers on hand
Types of synovial joints are (6 types)
plane hinge pivot condyloid or ellipsoidal saddle ball and socket
Plane joints allow only
slipping or gliding movements
in plane joints, articular surfaces are essentially
flat
Examples of plane joints are
the wrist and the ankle
Hinge joints motion is along a _____________ plane
singular
Examples of hinge joints are
elbow and knee
hinge joints are _________ joints that permit ______ and ______ only.
uniaxial
flexion and extension
Plane joints are the only examples of _________ joints
nonaxial
Pivot joints are where only ________ movement is allowed.
uniaxial
Examples of the pivot joint are
the joint between the axis and atlas and the proximal radioulnar joint
examples of condyloid joints are the
knuckles (metacarpophalangeal)
With condyloid joints the _______joints ______ all angular motions.
biaxial
permit
Saddle joints are similar to
condyloid joints
saddle joints allow for
greater movement
In a saddle joint, each articular surface has both a _____ and a _____ surface.
concave
convex
Example of a saddle joint is
the thumb
Concave means having a surface that curves
inward like the interior of a circle or sphere (hollow, scooped out)
Convex means having a surface that curves
outward like the exterior of a circle or sphere (rounded, bulging)
Ball and socket joints are _________ joints that permit the most ______ moving synovial joints.
multiaxial
freely
examples of ball and socket joints are the
shoulder and hip joints
Sprains are when the ligaments reinforcing a joint
are stretched or torn
Partially torn ligaments
slowly repair themselves
completely torn ligaments require
prompt surgical repair
why do ligaments heal slowly?
the are poorly vascularized (lack blood supply)
cartilage injuries are the _______ and ______ of overstressed cartilage
snap and pop
Cartilage injuries are common
aerobics injury
Cartilage injuries are repaired with
arthroscopic surgery
dislocations occur when bones are
forced out of alignment
dislocations usually are accompanied by ______, ________ and ________.
sprains
inflammation
joint immobilazation
subluxation is
partial dislocation of a joint
inflammatory and degenerative conditions include _____, ______, _______ and _______.
bursitis, tendonitis, arthritis and osteoarthritis
bursitis is an
inflammation of a bursa usually caused by a blow or friction
bursitis symptoms include
pain and swelling
bursitis is treated with
anti-inflammatory drugs
tendonitis is the
inflammation of tendon sheaths typically caused by overuse
tendonitis symptoms and treatment are
similar to bursitis
Acute forms of arthritis are caused by
bacteria.
Acute forms of arthritis are treated with
antibiotics
What is the most common chronic arthritis?
osteoarthritis
Osteoarthritis is often called the
“wear and tear” arthritis
Osteoarthritis affects more ______ then ______
women then men
With osteoarthritis, the articular cartilage is destroyed
by enzymes
OA is ______ and ________.
slow and irreversible
OA is destroyed more quickly
then replaced