Joints Flashcards
Immoveable joints
Synarthrosis
Slightly moveable joint
Amphiarthrosis
Freely moveable joint
Diarthrosis
Bones connected by fibrous tissue
Fibrous joints
Bones connected by cartilage
Cartilaginous joints
Bones connected by a capsule containing fluid
Synovial joints
Types of fibrous joints
Sutures, gomphoses, syndesmoses
Types of Cartilaginous Joints
Synchondroses and Symphyses
Types of synovial joints
Hinge, Saddle, Plane, Pivot, Condyloid, Ball and Socket
Sutures - joint type, movement type and location
Fibrous, synarthrosis, skull
Gomphoses - Joint type, movement type, location
Fibrous, synarthrosis, mandible and maxilla
Syndesmoses - joint type, movement type, location example
Fibrous, amphioarthrosis, middle radioulnar joint
Synchondroses - joint type, movement type, example
Cartilaginous, synarthrosis, between diaphysis and epiphysis of long bone
Symphyses - joint type, movement type, example
Cartilaginous, amphiarthosis, pubic symphysis
Hinge joint - example
Elbow joint, ankle joint, knee joint
Saddle - example
Carpometacarpal joint
Plane joint - example
Subtalar joint
Pivot joint - example
Proximal and distal radioulnar joints
Condyloid joint - example
Wrist joint
Ball and socket joint- example
Hip or shoulder joint
Three main features of synovial joint
Articulate capsule, articular cartilage, synovial fluid
Outer layer of articular capsule
Fibrous layer
Inner layer of articular cartilage
Synovial layer/synovium
Articular cartilage - type, function, blood supply type
Hyaline cartilage, minimise friction and shock absorption, avascular
Synovial fluid - three primary functions
Lubrication, nutrient distribution, shock absorption
Accessory structures of a joint
Accessory ligaments, bursae
Accessory ligaments - structure and function
Highly dense connective tissue, resisting strain and extreme movements
Bursae - structure, location, function, inflammation
Small fluid filled sacs, synovial membrane, allow greater freedom of movement while protecting against friction, bursitis
Articular nerves transmit…
Afferent impulses
Types of afferent impulses transmitted by articular nerves
Proprioceptive (joint position) and nociceptive (pain)
Hilton’s Law
The nerves supplying a joint also supply the muscles moving the joint and the skin covering their distal attachments
Arteries which supply joints
Articular arteries
Articular arteries location
Synovial membrane in the joint capsule
Anastomoses - meaning
Frequent communications between the arterial joint blood supply in order to supply blood regardless of position
Joint arteries are usually…
Above and below the joint by curving around it
Osteoarthritis is a result of…
Wearing away of the articular cartilage - less reduction in friction and shock absorption
Common locations of osteoarthritis
Heavy weight bearing joints - e.g, knee and hip
Osteoarthritis symptoms
Joint pain, stiffness and discomfort
Osteoarthritis can be a result of…
Old age, infection via the synovial membrane, auto inflammatory diseases (rheumatoid arthritis), reactive infections which aren’t of the joint itself (reactive arthritis)
The most important factor in joint stability is…
The relative size of the two articulating surfaces
Joints which are more unstable generally…
Have a greater range of movement
Stable joints generally have…
More ligaments
The rotator cuff muscles
Subscapularis, supraspinatus, infraspinatus and the Teres minor