Chapter 9 Joints Flashcards
joints, or articulations, are classified on the basis of their degree of movement. identify the correct order on basis of no movement- slight movement- freely movement
synarthrosis
amphiarthrosis
diarthrosis
the amphiarthrotic articulation that limits movements between the two pubic bones
pubic symphysis
the type of synarthrosis that binds each tooth to the surrounding bony socket
gomphosis
functions of the synovial fluid that fills the joint cavity
nourishes chondrocytes
provides lubrication
shock absorber
the reason that elbow and knee are called hinge joints
they permit angular movement in a single plane
the knee joint functions as a
hinge joint
the joint that permits the greatest range of motion of any joint in the body
shoulder joint
body movements occur at joints where two bones connect
articulations
based on range of motion of the joint
functional
the anatomical observation of the joint
structural
immovable joint
synarthrosis
slightly movable joint
amphiarthrosis
freely movable joint
diarthrosis
4 structural classifications
bony
fibrous
cartilaginous
synovial
four types of synarthrotic joints
suture
gomphosis
synchondrosis
synostosis
bones are interlocked, bound by dense fibrous connective tissue, found only in skull
suture
fibrous connection, binds teeth to sockets
gomphosis
is a rigid cartilaginous bridge between epiphyseal cartilage of long bones, and vertebrosternal ribs and sternum
synchondrosis
fused bones, immovable, metabolic suture of skull, epiphyseal of long bones
synostosis
more movable than synarthrosis, stronger than freely movable joint
amphiarthroses
two types of amphiarthroses:
syndesmosis: bones connected by ligaments
symphysis: bones separated by fibrous cartilage
movable joints, at ends of long bones, within articular capsules, lines with synovial membrane
synovial joints
components of synovial joints:
articular cartilage
synovial fluid
accessory structures
contains slippery proteoglycans secreted by fibroblasts
synovial fluid
superficial to the joint capsule, protect articular cartilages
fat pads
support and strengthens joints
ligaments
ligaments with torn collagen fibers
sprain
attach to muscles around joint, helps support joint
tendons
pockets of synovial fluid, cushions areas where tendons or ligaments rub
bursae
articulating surfaces forced out of position, damages articular cartilages, ligaments, joint capsules
dislocation
a partial dislocation
subluxation
types of dynamic motion
linear motion
angular motion
rotation
planes of dynamic motion
monaxial
biaxial
triaxial
two surfaces slide past each other, between carpal or tarsal bones
linear motion
circular motion without rotation, angular motion
circumduction
rotates toward axis (inward)
medial rotation
rotates away from axis (outward)
lateral rotation
classification of synovial joints by shape
gliding hinge pivot ellipsoid saddle ball-and-socket
oval articular face with a depression, biaxial
ellipsoid joints
two concave, straddled, biaxial
saddle joints
rounded articular face in a depression, triaxial
ball-and-socket joints
pads of fibrous cartilage, separate vertebral bodies
intervertebral discs
tough outer layer, attaches disc to vertebrae
anulus fibrosus
elastic gelatinous core, absorbs shock
nucleus puiposis
connects anterior bodies
anterior longitudinal ligament
connects posterior bodies
posterior longitudinal ligament
connects laminae
ligamentum flavum
connects spinous processes
interspinous ligament
connects tips of spinous processes
supraspinous ligament
continues supraspinous ligament
ligamentum nuchae
shoulder ligaments
glenohumeral coracohumeral coraco-acromial coracoclavicular acromioclavicular
deepens socket of glenoid cavity, fibrous cartilage lining, extends past the bone
glenoid labrum
largest articulation, trochlea of humerus and trochlear notch of ulna
humero-ulnar joint
smaller articulation, capitulum of humerus and head of radius
humeroradial joint
attached to radial tuberosity, controls elbow motion
radial tuberosity
radial collateral, annular, ulnar collateral
elbow ligaments
a pain and stiffness of skeletal and muscular systems
rheumatism
all forms of rheumatism that damage articular cartilages of synovial joints
arthritis
caused by wear and tear of joint surfaces, or genetic factor affecting collagen formation
osteoarthritis
an inflammatory condition, caused by infection, allergy, or autoimmune disease
rheumatoid arthritis
occurs when crystals form within synovial fluid due to metabolic disorders
gouty arthritis