Joints Flashcards
(27 cards)
Weakest point of any skeleton?
Joints
2 basic functions of joints
Hold bones together
Enable movement
Joints
Result in a type of motion
Mobility vs stability body
articulations
Most Mobile** Mobility ( unstable) 1 glenohumeral joint ( shoulder) 2 Coxal ( hip joint) 3. Elbow joint 4. Intervertebral joints 5 Suture Immobile*** Stability (most stable)
Articulations: classification
Difference between fibrous, cartilaginous and synovial joints?
Fibrous - allows No movement
Cartilaginous - allows some movement
Synovial - allows free movement
Fibrous Joints
Held by dense regular ct
Little no movement
No joint cavity
Symphysis joint classification
Held by fibrocartilage
Resists compression
Shock absorber
Slight to no movement
No joint cavity
Found in pubic symphysis, intervertebral disc articulations
Cartilaginous joint*
Synchondroses joint classification
Cartilaginous joints
Joined w/ hyaline cartilage
Little to no movement
No joint cavity
May ossify over time( turn into bone)
Found in epiphyseal plates in growing bones, costochondral joints
Suture joint classification
Fibrous joints
Lambdoid suture connects occipital and parietal bones
Bones fused together to form unit
Held by dense regular ct
Little no movement
No joint cavity
Syndesmosis joint classification
Interosseous membrane between bones
Articulation between radius and ulna and between tibia and fibula
Held by dense regular ct little to no movement
- fibrous
Synovial joint
Freely movable
Contains space between bones and joint cavity
Most complex & most common joint of body
Gomphosis joint classification
Tooth in socket ( avalous)
Tooth jaw
Held by dense regular cr
Little or no movement
No joint cavity
Fibrous joint
Anatomy of typical synovial joint
Periosteum Ligaments Articular capsule: fibrous layer & synovial layer Articular cartilage Joint cavity ( contains synovial fluid)
Synovial fluid in joint cavity
Secretes synovial membrane
Lubricates ice on ice
Nourishes chondrocytes
Waste removal
Constantly recycles
Shock absorption
Meniscus
Wedge shaped fibrocartilage
In knee joint only
Bursa
Fluid filled sac lines w/ synovial brand used to overcome friction
Anterior cruciate
Prevents from moving forward acl
Posterior cruciate
Prevents from moving back word
Tendon strength
An elongated bursa
Wraps around tendons filled with synovial fluid
Erases friction
Common in wrist hand ,foot ankle
Contains opened sheath in finger
Digital sheath in pinkie and ring
Common sheath in wrist hand
Planar joint
Gliding
Simplest and least movable
Only side to side
I’m between interact plea and inter tarsals
Flat single plane uniaxial synovial joint
Hinge joint
Uniaxial synovial joint
Found in elbow, knee, inter phalageal joints ( fingers/ toes
Movement In A single plane
Pivot joint
Uniaxial synovial joint
Formation of ligamentous ring
One bone rotates on its longitudinal axis around bone.
Radio ulnar joint
Exp atlas and dense for head rotation
3 types of synovial joints
Uniaxial
Biaxial
Multiaxial
Condyloid joint
Biracial synovial joint
Movement in two axes
Convex/ concave surfaces
Mp joint ( knuckles/ toes)
