Tissue healing Flashcards
Skeletal muscle structure
- Collegen
- Elastin
- Connective tissue
Muscular structure properties
- Extensibility: Capacity to stretch to the normal resting length after contracting
- Excitability: Ability to respond or contract in response to chemical/electrical signals
- Elasticity: Ability to return to original resting length after a muscle has been stretched
- Contractibility: Ability to shorten causing movement of structures to which muscles are attached
Strain curve
Elastic region: Will return to original shape with given stress
Plastic region: Will not return to original shape with given stress
Tissue deformity
Failure point: Partial or complete tear and loss of ability to hold tension
Soft tissue healing
May include - cellular pathology, cell necrosis, wound healing, inflammation
Phases of tissue healing
- Bleeding
- Inflammation
- Repair
- Re modelling
Bleeding phase
- Stopping blood when an injury occurs
- Vasoconstriction: blood vessels narrow so ^ blood pressure
- Fibrin mesh (acts as a glue)
- A scab is formed
Inflammation 1-5 days
Body’s attempt to heal itself from tissue damage
- Allows other massed cells to help with healing (they consume and remove dead tissue)
Proliferation (repair) 3-21 days
-Fibroblasts migrate to the area from surrounding tissue within the first few days due to chemical mediation
- Capillaries re-establish blood flow
- O2 helps with collegen production (helps with scaring)
- Peak activity 2-3 weeks
Remodelling 14 days-2 years
- Type 3 collegen is reabsorbed into type 1
- Type 1 is now more abundant
- Optimal loading is required for strength of collegen
- Scar tissue formation
Cardinal signs of inflammation
- Redness (Increased blood flow to area
- Pain (Activation and stretching of pain receptors)
- Swelling (Exudation of fluid)
- Heat (Increased blood flow)
- Loss of function (Pain, disruption of tissue)
