chapter 1 Flashcards
cellular component in connective tissue.
fibroblast
fibroblast is in all connective tissue except
reticular tissue
when fibroblast is dormant it is a
fibrocyte
what are the only cells found in tendons?
fibroblasts . fibroblasts also form fibers
what are the three types of fibers
- collagenous (white) 2 reticular fibers. elastic fibers CLE
What is the purpose of connective tissue ?
- supports and binds structures together
- protects against compressive, shearing and tensile forces
- helps with distribution of nutrients
- removes broken down cells and foreign bodies
- stores iron to be used in hematopoiesis
- insulates and acts as a cushion (fat)
- provides a pathway for nerves
- prevents the spread of infection
- allows for movement
- allows for growth
- supports posture
The nature of ground substance provides the basis of subdividing connective tissue in three categories
A. soft ground substance: connective tissue proper
B. firm but flexible connective tissue is cartlilage
C. Rigid ground substance is bone
Dense connective tissue
Ligament
tendons
aponeurosis
Ligaments
bone to bone
bone to cartilage
cartilage to cartilage
tendons
muscles to bone
aponeurosis
muscle to muscle
what is the innervation of connective tissue proper
propriocepters (position)
nocioceptors ( pain)
pacinian corpuscles (pressure) reduce function to protect the joint
golgi corpuscles (stretch sensation
proprioceptors
position
nocioceptors
pain
golgi
stretch
pacinian
pressure ( reduce function to protect the joint)
proprioceptors
monitor position and function
when ligament proprioceptors are stimulated they produce an inhibitory response in muscle activity and protect the muscle
nocioceptors
monitor pain
pacinian corpuscles
pressure receptors
golgi corpuscles
stretch sensation
composition of ligaments
dense regularly arranged fibrous connective tissue
action of ligaments
passive restraints that limit extreme joint movement with the aid of muscles
what DONT ligaments do
they dont keep articular surfaces together or maintain joint postion on muscles can do that
how can a ligament be damaged
-strain
-laceration
-detachment
continued microtrauma induces what in ligaments
-elongation
-looseness
-other degenerative changes
articular ligaments do not have what?
articular ligaments do not have any elastic fibers
what happens when ligaments are overstretched?
they do not return to their original length and this causes laxity of the joint
two accessory ligaments of the mandible
sphenomandibular
stylomandibular
what are the functional ligaments of the tmj
capsular ligament
discal ligaments (medial and lateral)
temporomandibular ligament
capsular ligament
-vascularized and innervated
-surround the joint and allows containment of fluid , the TM ligament and the discal ligaments
The capsular ligament acts to do what ?
resist any medial,lateral and inferior forces that tend to seperate or dislocate the articular surfaces