Joints Flashcards
Ways to classify joints
1) amount of movement
2) organization of joints
Immovable joints (sutures, tooth/jaw, growth plates)
Synarthrotic Joints
Freely moveable joints (knee, hip, shoulder, elbow)
Diarthrotic Joints
Slightly moveable (vertebrae, pubic symphasis, interosseous membrane)
Amphioarthrotic Joints
Organization of joints
1) Bony
2) Fibrous
3) Cartilagnious
4) Synovial
Types of synarthrotic joint; found In the skull
Suture
Type of synarthrotic joint; found in the tooth and jaw
Gomphosis
Type of synarthrotic joint; found in kids; growth plates
Synchondrosis
Type of synarthrotic joint; found in adults; fused growth plates
Synostosis
Type of amphioarthrotic joint; between tibia and fibula; bones connected to ligaments
Syndesmosis
Type of amphioarthrotic joint; found in the pubic symphasis; fibrocartilage
Symphasis
Joints with a capsule filled with fluid the consistency of egg white
Synovial Joints
Functions of synovial joints
1) lubrication
2) gives nutrients
3) shock absorber
Reduce friction and reduces impact
Articulate Cartilage
The point where two bones meet
Articulations
wedges of tissue between bones that:
1) reduce shock
2) stabilize the joint
3) cushion
meniscus
protect cartilage, act as a filter, and cushion
fat pads
connect bone to bone
ligaments
thickened capsule wall; type of ligament
accessory ligament
outside of the joint capsule; type of ligament; patellar ligament, LCL, MCL, popiliteal
Extracapsular ligament
inside the capsule; type of ligament; ACL, PCL
Intracapsular Ligament
stretching a ligament
sprain
connect muscle to bone
tendons
stretching a muscle or tendon
Strain
fluid filled sacs between ligaments/tendons and bone
Bursae
Swollen bursal sacs due to over use
Bursitis
Joint Stabilizing factors
1) ligament location
2) shapes of bony surfaces
3) presence of bone, muscle, or fat pads
4) tension of tendons
complete dislocation
luxation
partial dislocation
subluxation
one bone slides over another (wrists)
gliding
decrease the angle of a joint (lifting a dumbbell)
flexion
increasing the angle 90-180 degrees
extension
increase angle over 180 degrees
hyperextension