Joints, Tendons, Ligaments Flashcards
What is a joint
Where two or more bones or other skeletal components are joined together
What is a tendon
A fibrous band of connective tissue that is bonded to bone and connects muscle to bone
What is a ligament
A fibrous band of connective tissue that connects bones and other connective tissues together at joints
What is cartilage
Fibrous and viscoelastic connective tissue composed of closely packed collagenous fibres in a proteoglycan rich ECM
What is synarthroses
Immovable joints
What is amphiarthroses
Slightly movable joints
What is diarthroses
Freely movable joints
What are 4 types of structural classifications
Bony fusion
Fibrous
Cartilagenous
Synovial
What are fibrous joints
Cones connected by dense regular connective tissue
No joint cavity
Slightly immovable or not at all
What are 3 types of fibrous joints
Sutures
Syndesmoses
Gomphoses
What is syndesmoses
Bones connected by ligaments only
Amount of movement depends on length of the fibres
Means ‘with band’
What is gomphoses
Ligament is a short periodontal ligament
Almost a peg in a socket
What are 2 types of cartilagenous joints
Synchondroses
Sympheses
What are cartilagenous joints
Articulating bones united by cartilage
No joint cavity
Slightly movable
What is synchondroses
Hyaline cartilage unites the bones
Immovable
‘Junction of cartilage’
What are 2 examples of synchondroses
Epiphyseal plates
Joint between first ribs costal cartilage and manubrium of the sternum
What are 2 examples of sympheses
Intervertebral discs
Pubic symphysis of the pelvis
What is sympheses
‘Growing together’
Fibrocartilage unites the bones
Hyaline cartilage on articular surfaces of bones to reduce friction
Slightly movable
Shock absorber
Strength and flexibility
What is a synovial joint
Are all diarthroses - freely movable
All contain fluid filled joint cavity
Most body’s joints
What is articular cartilage
Hyaline
Spongy cushions absorb compression
Protects ends of bones from being crushed
What is the outer articular capsule
Fibrous capsule of dense irregular connective tissue continuous with periosteum
What is the inner articular capsule
Synovial membrane of loose connective tissue - makes synovial fluid
What does synovial fluid contain
Special glycoproteins
What is the function of synovial fluid
Filtrate of blood
Nourishes cartilage and slippery lubricant
What are 3 reinforcing ligament of synovial joints
Capsular - thickened part of capsule
Extra capsular
Intra capsular
Where is the extensive capillary blood vessels in synovial joints
Capillary beds in synovial membrane - produce the blood filtrate
Where are 3 places you would find elastic cartilage
Epiglottis
Larynx
Pinna
Where are 2 places you would find fibrous cartilage
Pubic symphesis
Intervertebral discs
What cell types do cartilage contain
Very hydrated ECM containing chondrocytes and unique organic matrix of proteoglycan and collagen fibres
Avascular and not innervated
What does the superior border of the TMJ capsule wrap around
The articular eminence and fossa
What does the inferior border of the TMJ capsule wrap around
The condyle - neck
What are the 3 places where the TMJ disc attaches to
Mandibular condyle
Temporal bone - anterior not direct attachment
Temporal bone - posterior divides into 2
Posteriorly of the TMJ disc what does the upper division attach to
Post glenoid process
Posteriorly of the TMJ disc what does the lower division attach to
Condylar neck
What are the 3 major ligament of the TMJ
Stylomandibular ligament
Sphenomandibular ligament
TMJ ligament - lateral ligament
What is the stylomandibular ligament
Styloid process to the angle of the mandible
Tightens with protrusion
What is the TMJ ligament - lateral ligament
Reinforces the inferior portion of the capsule
Prevents excessive retraction of mandible
Runs from tubercle of the zygomatic process to neck of mandible
What is the sphenomandibular ligament
Not part of TMJ
Runs from spine of sphenoid to ramus of mandible - lingula of mandibular foramen
Tightens with protraction of mandible
Landmark for local anesthesia
Does cartilage have a nerve supply
No
If there was no synovial fluid what would wear away first
Cartilage then bone on bone and you wont feel the cartilage wearing away because they do not have a nerve supply