Chapter 8: Articulations Flashcards
Articulations
Where bones meet
°allow movement
°provide stability
°allow long bones to lengthen (epiphyseal plate)
Function classification
Based on movement
(3 of them)
°Synarthrosis
°Amphiarthosis
°Diarthrosis
Synarthrosis
No moment
Amphiarthrosis
Alittle movement
Diarthrosis
A wide range of motion
Structural classification
Based on structural features
(3 of them)
°Fibrous joints
°Cartilaginous joints
°Synovial Joints
Fibrous Joints
°Dense regular collagenous conective tissue
° synarthrosis and amphiarthrosis
Cartilaginous Joint
°Cartilage
°synarthrosis and amphiarthrosis
Synovial joints
°Fluid-filled joint capsule with hyaline cartilage at articular ends.
°Diarthrosis
Fibrous Joints
(3 types)
°Suture
°Gomphosis
°Syndesmosis
Suture
Fibrous CT between flat bones of cranium (immovable)
Gomphosis
Tooth in bony socket (periodontal ligament) immovable joint
Syndesmosis
Joint between tibia and fibula, ulna and radius (interosseous membrane) slightly movable
Cartilaginous joints
(2 of them)
°synchondrosis
°symphsis
Synchondrosis
°Hyaline cartilage
°Synarthrosis (immovable)
°Found in the cartilage of ribs, sternum, and epiphyseal plate)
Symphysis
°Fibrocartilaginous pad
°amphiarthrosis (little movement)
°Found in intervertebral joints and pubic symphysis
Synovial Joints
(3 types)
°Joint cavity (synovial cavity)
°Articular capsule
°Articular cartilage
°Diarthorsis
°allow more mobility
° less stable than other joints
Joint cavity
(Synovail cavity) space found between articulating bones.
Articular Capsule
Double layered structure
°Outer fibrous layer
°Innerlayer synovial membrane that has synovial fluid
Articular Cartilage
°Hyaline cartilage
°Covers exposed articular bones with a joint
Structures that provide additional stabilization (3 of them)
Ligament
Tendon
Bursae and tendon sheaths
Ligaments
Dense regular CT connects bone to bone
Tendons
Dense regular CT connects bone to muscle
Bursae and tendon sheaths
Provides stabilization forces
Arthritis
Inflammation of joints that result in pain and limitations of joint movement
Arthritis (3 types)
°Osteoarthritis OA
°Rheum arthritis (RA)
°Gouty arthritis
Osteoarthritis (OR)
Most common happens from wear and tear, injury, or age. Causes pain, joint stiffness, and lost mobility
Rheumatoid arthritis (RA)
Joint destruction caused by autoimmune
Gouty arthritis
Joint damage due to inflammatory reaction to uric acid crystal deposits
Moment at Synovial Joints
Gliding movements
Sliding motion between articulating surfaces.
Moment at Synovial Joints
Flexion
Closing an angle.
Movment at Synovial Joints
Extension
Extended straight out
Moment at Synovial Joints
Hyperextension
Extending straight out and then bending at the end
Moment at Synovial Joints
Abduction
Spreading out or moving away.
Moment at Synovial Joints
Adduction
Add in or moving closer.
Moment at Synovial Joints Circumduction
Movement in a circular pattern.
Moment at Synovial Joints
Rotation
To turn.
Moment at Synovial Joints
Inversion
the soles of the feet moving inward, toward the midline of the body
Moment at Synovial Joints
Eversion
movement of the sole of the foot outward, away from the midline of the body
Moment at Synovial Joints
Supination
the movement of the radius and ulna bones of the forearm so that the palm faces forward
Moment at Synovial Joints
Pronation
palm faces backward.
Moment at Synovial Joints
Dorsiflexion
Toes point upwards
Moment at Synovial Joints
Plantar Flexion
Toes point downwards
Types of synovial joints
(6 of them)
°plane joint
°hinge joint
°pivot joint
°condylar (ellipsoid) joint
°saddle joint
°ball and socket joint
synovial joints
Plane joint
Gliding joint
°tarsal
°carpals
synovial joints
Hinge joint
Elbow
Humerus and ulna
synovial joints
Pivot joint
One bone pivots or rotates around the other
°C1 & C2
°radius & ulna
synovial joints
Condylar (ellipsoid) joint
Knuckles
synovial joints
Saddle joint
Thumb & wrist
synovial joints
Ball and socket joint
°Scapula glenoid cavity & humerus head
°coxal bone acetabulum & Femur head
Humeroulnar joint
Articulation between trochlea of humerus and trochlear notch of ulna.
Humeroradial joint
Articulation between capitulum of humerus and head of radius
Knee
Tibiofemoral joint
Articulation between femoral and tibial condyles
Shoulder
Glenohumeral joint
Head of humerus and glenoid cavity of scapula
Hip
Coxal joint
Acetabulum of coxal and head of femur