Soft Tissue Flashcards
4 Types of basic tissue types
Muscle
nerve
epithelial
Connective tissue
- Bone
- Cartilage
- Blood Cells/ blood forming tissues
- Adipose
- Regular (tendons and ligaments)
- Irregular (Dense and loose Fascia) * focus of STM
All connective tissues are of…
Mesodermal origin
Connective tissue structures are
interconnected and continuous
Layers of fascia
Abdomen: 3 layers
Pelvis: 5 layers
David’s Law
Arrangement and specialization of connective tissues are dependent upon the stress that is placed upon them
Regular CT tendon
Regular parallel bundles of collagen
formed from connective tissue within muscle
Made to withstand longitudinal forces not perpendicular stresses
*golden gate bridge
Regular CT ligament
Spiral and oblique arrangement of collagen
Tough and unyielding
Fascia (Irregular CT- dense and loose)
Withstands 3 dimensional stresses (form without skeleton)
Irregular arrangement of collagen and elastin fibers
Sheaths are continuous and interweaving
Superficial: thinner and more delicate allowing skin mobility
Deeper: thicker and stronger separating and supporting surrounding structures
Parallel fibers and sheaths: arranged at angles to each other to provide greater strength and extensibility
*sweater weave restriction
Space between fibers that allows movement is a “Functional Joint” -Gratz
Allows interconnection and support
Serves to attenuate and absorb shock throughout system
Enhances continuity of motion and creates smooth spiral/diagonal motion
Protects against spread of infection
Responsible for metabolite exchange in lymph system
Skeletal Muscle
Collagenous fascial sheaths surround muscle fibers (endomysium), fiber bundles (Perimysium), and the whole muscle (Epimysium)
10% of muscle mass is fascia which forms the tendon
Multifasicular Peripheral nerve
30-70% of a peripheral nerve is connective tissue (greatest amounts in compression zones)
Protects the neural components from damage
Nerves are the most blood thirsty
Muscle play
Normal accessory mobility of a muscle
- surrounding muscles
- Neurovascular structures
- Bony structures
Lost in a dysfunctional state altering the functional capacity of those structures
*slide and glide of muscle in all directions
Composition of fascia
Fibers
-Fibroblasts
-Fibers
Collagen
-Most prolific loose connective tissue fiber
-Type 1 found in tendons, ligaments, fascia, and capsules
Elastin Fibers
Nonfiber
-Extracellular Matrix
Collagen
High tensile strength (3-8% creep) 50% of the strength of bone-does not move much in single fibers but lots of extensibility when in groups
half life of 300-600 (500) days (whole connective system is turned over in about 3.5 years)
Amino acids bond by covalent bonds (proline, Lysine, Glysine)- process- fibrogenesis
*cotton twisting to become strong triple helix