Joints (End of Exam 2) Flashcards
2 bones meet or join
Joints
Scientific study of joints
Arthrology
Study of motion
Kinesiology
What determines the direction and distance of movement (ROM)
Joint structure
What happens to joint strength as mobility increases?
Decrease
What are the 2 methods of joint classification?
Structure and function
What are the 4 structural classifications of joints?
Bony fusion, fibrous joint, synovial joint, cartilaginous joint
Bones fuse together
Bony fusion
Bones are interlocked by dense connective tissue
Fibrous joint
Bones are interlocked by cartilage
Cartilaginous joint
Bones connected by a connective tissue capsule that surrounds a lubricated cavity
Synovial joint
What are the 3 functional classifications of a joint?
Synarthrosis, amphiarthrosis, diarthrosis
No movement
Synarthrosis
Little movement
Amphiarthrosis
Freely movable
Diarthrosis
Rigid immovable joints
Synostoses
Is synostoses synarthrosis, amphiarthrosis or diarthrosis? Example?
synarthroses; epiphyseal lines
Only between bones of skull
Suture
Are sutures synarthrosis, amphiarthrosis or diarthrosis? Example?
synarthrosis, sagittal suture
Binds tooth to socket
Gomphoses
Is gomphoses synarthrosis, amphiarthrosis or diarthrosis?
Synarthroses
What are the 3 types of fibrous joints?
Gomphoses, sutures, interosseous membrane
Sheet of connective tissue that binds neighboring long bones
Interosseous membrane
Is interosseous membrane synarthrosis, amphiarthrosis or diarthrosis? Example?
Amphiarthrosis; tibia and fibula
What are the 2 types of cartilaginous joints?
Synchondroses, symphyses
Joints where diaphysis and epiphysis connect
Synchondroses
Is synchondroses synarthrosis, amphiarthrosis or diarthrosis? Example?
Synarthroses, epiphyseal plates
Connected by fibrocartilage
Symphyses
Are symphyses synarthrosis, amphiarthrosis or diarthrosis? Example?
Amphiarthrosis; pubic symphysis and intervertebral discs
Movement around 1 axis
Monoaxial
Movement around 2 axes
Biaxial
Movement around 3 axes
triaxial
Thick layer of dense connective tissue that encloses the synovial joint cavity
Articular capsule
Lined on the inside with synovial membrane
Fibrous membrane
Contains fibroblasts that secrete synovial fluid into synovial cavity
Synovial membrane
Nourishes articular cartilage; shock absorption and lubrication
Synovial fluid
Reinforce and strengthen capsule; localized thickening of capsule
Accessory ligaments
Cartilage at the ends of long bone, shock absorber so bones don’t hit each other
Articular cartilage
Pad of fibrocartilage which is a better fit between articulating surfaces; shock absorption
Meniscus
Localized masses of adipose tissue
Fat pad
Small, synovial fluid filled connective tissue pockets; reduces friction
Bursae
What happens to the strength of a joint if it is more mobile?
Weaker
What are the factors that affect range of motion at synovial joints?
Contact of soft parts, arrangement and tension of muscle, mobility, structure or shape, strength and tension of ligaments
What is an example of a planar joint? Is it monoaxial, biaxial or triaxial?
between carpals and tarsals; biaxial
What is an example of a hinge joint? Is it monoaxial, biaxial, or triaxial?
Elbow; monoaxial
What is an example of a pivot joint? Is it monoaxial, biaxial, or triaxial?
Atlas/axis and radioulnar joint; monoaxial
What is an example of a condyloid joint? Is it monoaxial, biaxial, or triaxial?
radius with carpals and metacarpophalangeal joint; biaxial
What is an example of a saddle joint? Is it monoaxial, biaxial, or triaxial?
carpometacarpal joint of thumb; biaxial
What is an example of a ball-and-socket joint? Is it monoaxial, biaxial, or triaxial?
Head of humerus and glenoid cavity; triaxial
Synovial joints are swollen, stiff, painful
Arthritis
Slow deterioration of articular cartilage produces bone spurs; afflicts larger joints
Osteoarthritis
Occurs when sodium urate crystals form within synovial joints
Gouty arthritis
Autoimmune disorder, cartilage attacked, primary symptom is inflammation and swelling of synovial membrane causing the fusion of joints
Reumatoid arthritis
What is the only bony fusion joint?
Synostoses
What are the 3 types of fibrous joints?
Gomphoses, sutures, interosseous membrane
What are the 2 types of cartilaginous joints?
Synchondroses, symphyses