Articulations Flashcards
Synarthroses
No movement
Sutures of the skull
Allow growth
Amphiarthroses
Little movement
Pubic symphysis and intervertebral joints
use to dissipate forces
Diarthroses
Free movement
- actual cavity
- encapsulated
- synovial fluid
- ends of bones covered with hyaline cartilage (boy end,girl end)
- good at reducing friction and shock absorption
What are the six subcategories of Diarthroses joints?
- pivot or trochoid uniplanar and uniaxial
- ball and socket or enarthrodial triplanar and triaxial
- hinge or ginglymus uniplanar and uniaxial
- condyloid or ellipsoidal biplanar and biaxial
- saddle or sellar biplanar and biaxial
- gliding or arthrodial nonaxial
Penis bangs cute horny school girls
Pivot joint and examples
(trochoid) uniplanar and uniaxial
Examples: atlantoaxial joint and radioulnar joints (both proximal and distal)
ball and socket and examples
(enarthrodial) triplanar and triaxial
glenohumeral and coxofemoral/acetabulofemoral joints
hinge
(ginglymus) uniplanar and uniaxial
humeroulnar and tibiofemoral and talocrural joints
condyloid
(ellipsoidal) biplanar and biaxial
radiocarpal and metacarpophalangeal joints (#2-5)
saddle
(sellar) biplanar and biaxial
carpometacarpal joint of the thumb (only example of a saddle joint in the body)
Gliding
(arthrodial) nonaxial
interperacarpals and intertarsals
trochoid and examples
(pivot) uniplanar and uniaxial
Examples: atlantoaxial joint and radioulnar joints (both proximal and distal)
Enarthrodial and examples
(ball and socket) triplanar and triaxial
glenohumeral and coxofemoral/acetabulofemoral joints
ginglymus and examples
(hinge) uniplanar and uniaxial
umeroulnar and tibiofemoral and talocrural joints
ellipsoidal and examples
(condyloid) biplanar and biaxial
radiocarpal and metacarpophalangeal joints (#2-5)
sellar and examples
(saddle) biplanar and biaxial
carpometacarpal joint of the thumb (only example of a saddle joint in the body)
arthrodial and examples
(gliding) nonaxial
interpacarpals and intertarsals
increased flexibility or over flexibility can cause dislocation in joint
Hypertonic
Joint stability
the propensity of an articulation to resist displacement.
Joint stability is inversely related to joint…
ROM/Mobility/Flexibility
Factors that contribute to joint stability/ROM:
- joint ligaments
- muscle tension; agonist antagonist relationship
- fascia or connective tissue
- atmospheric pressure
- shape of the articulating surfaces of the bones (geometry, or architecture of the articulation)
Joint ROM/Mobility/Flexibility is inversely related to joint?
Joint stability
A force may be described as a push or a pull. Are muscles capable of both pushing and pulling?
No! Muscles can only pull…that is, an individual muscle can only cause shortening.
*However, Muscles pull on bones, which create levers, can produce a musculoskeletal system that both pulls and pushes.
A Force, therefore, is a…
push or a pull that speeds up, slows down, deforms and/or changes the direction of an object.
What are the four Forces that are commonly found in biomechanics?
- compression
- tension
- shear
- torsion
3 degrees of freedom means?
Joint is able to move in 3 different planes
hypertonic
increased flexibility or over flexibility can cause dislocation in joint
Describe the Movement Triad
Control (neurons,endocrine sys)
Motor (muscles Fuel (cardiovascular)
bones, tendons)
This all makes a triangle
No movement
Example: Sutures of the skull
Synarthroses joints
Little movement
Pubic symphasis and intervertebral disks
Amphiarthroses joints
Free movement
- actual cavity
- encapsulated
- synovial fluid
- ends of bones covered with hyaline cartilage
Diarthroses joints
foot inversion/eversion
along the Frontal Plane
