Chapter 9 - Joints Flashcards
No movements
Synarthrosis
Little movement
Amphiarthrosis
Free movement
Diarthrosis
fibrous joint, synarthrosis
Suture
fibrous joint, synarthrosis, eg. teeth
Gomphosis
fibrous joint, amphiarthrosis or synarthrosis , collagen fibers
Syndesmosis
amphiarthrosis, bones separated by pad of fibrocartilage
Symphysis
Between parietal bones in skull
suture
Between tooth and jaw
Gomphosis
Between tibia and fibula
Syndesmosis
Interconnecting serrated surfaces
Serrate sutures
Overlapping angled edges
Lap sutures
Where two bones simply butt against one another
Plane sutures
Involves a plate or piece of hyaline cartilage
Synchondrosis
Joints that use a pad of fibrocartilage to cushion between the two bones
Symphyses
A synovial joint, permit wide range of motions
Diarthrosis
pad of fibrocartilage between opposing bones
Meniscus
Localized mass of adipose tissue superficial to joint capsule (Cushions and protects
Fat Pads
May be inside or outside joint capsule; helps stabilize
Extrinsic ligaments
small, sacks of synovial fluid that cushion around joint, where tendons and ligaments rub
Bursae
angle gets less than 180 degrees
Flexion
Angle equals 180
Extension
angle equals more than 180
Hyperextension
moving apart
abduction
coming together
adductions
circular rotation around point
circumduction
movement of bone in longitudinal axis
Rotation
Palm facing up or anteriorly
Supinate
Palm facing down or posteriorly
Pronate
The degree of contraction found in a muscle that is currently at rest
Muscle tone
A sack of synovial fluid that cushions or wraps around a tendon or tendons
Bursa
Tilting the head back is an example of this
First class, RFE
Lifting the lower leg from a sitting position is an example of this
Second class, ERF
Lifting the forearm is an example of this
Third class, REF
Diarthrosis, found in most of appendicular skeleton, surrounded by fibrous articular capsule lined with synovial membrane.
Synovial joint
Types of synovial joints
Knee and Shoulder
longer bursae that wraps around all of the tendon or bundle of tendons.
Tendon sheath
Have a fulcrum, effort arm, and a resistance arm
Levers
Fulcrum
fixed point
effort arm
distance from the applied force to fulcrum
distance from resistance to fulcrum
resistance arm