Anatomy Quiz 1 Review Flashcards
Uniaxial
One axis of movement
Biaxial
Two axis of movement
Multiaxial
Multiple axes of movement
Degree of movement (fibrous)
Immovable
Degree of movement (Cartilaginous)
Semi moveable
Degree of movement (synovial)
Freely moveable
2 Types of fibrous joints
- Sutures
- Syndesmosis
3 Types of joints
Fibrous, Cartilaginous, Synovial
Features of sutures
-only occur in the scull
-limited movement
Features of Syndesmosis
-bones connected by sheet of fibrous tissue
i.e. forearm bones Lot’s of space between the bones = lots of movement
Fibrous joints
Connected by fibrous tissue
The degree of movement is determined by?
The amount of fibrous tissue between the two joint surfaces (or the articulating surfaces)
Cartilaginous Joints
Joint connected by cartilage or cartilage and fibrous tissue
i.e. cartilage connects the ribs o the breastbone
i.e. the vertebrae are connected by fibrocartilaginous intervertebral disks i.e. the pubic symphisis
Three features of synovial joints
- Joint Cavity
- Articular Cartilage
- Join Capsule
Joint Cavity
Space between 2 joint surfaces
Articular Cartilage
-shiny, whitish connective tissue
-protects underlying bone
-designed to absorb shock (joint forces), allow movement (smooth surface), and o last (very tough) (it can still be damaged/wear away over time)
-no nerves, no blood vessels
-usually hyaline cartilage
Joint capsule
-surrounds and lines the joint
-does not cover the articular cartilage
-makes synovial fluid contained within the joint (synovial fluid has the consistency of egg-white, is clear coloured and 5x more slippery than ice)
-friction between the 2 joint surfaces is minimized by lubrication from the synovial fluid and by the articular cartilage
i.e. cartilage connects the ribs to the breastbone
i.e. the vertebrae are connected by fibrocartilaginous intervertebral disks (pubic symphisis)
6 Types of synovial joints
- Condyloid (Ellipsoid) joints
- Saddle joints
- Ball and Socket joints
- Plane joints
- Pivot joints
- Hinge joints
Condyloid (Ellipsoid) joints
-biaxial
-flexion/extension and Abduction/Adduction (and circumduction)
-knuckle like
Saddle joint
-biaxial
-opposing surfaces are shaped like saddles
-concave and convex articulate with each other
i.e. thumb
Ball and Socket joints
-multiaxial
-spheroid all surface articulates with socket of other surface
i.e. hip
Plane
-gliding or sliding movements
-joint surfaces are flat or almost flat
-most are uniaxial
i.e. acromioclavicular joint
Pivot joints
-uniaxial
-rotation
-rounded process rotates within a sleeve or ring
i.e. C1-C2
Hinge joints
-uniaxial
-flexion and extension only
i.e. humeroulnar joint
Bursa
-sacs filled with synovial fluid
-decrease the friction generated by the motion of one tissue over another
-normal bursa are flat
(The synovial layer is ~1 capillary thick but when inflamed they can be as big as an egg
Bursa are located between
-tendon and bony prominences
-tendons and other tendons
-bone and overlying skin
Ligaments
-connect bone to bone
-will check a movement - in other words, prevent excessive movement in a specified direction
-movement at a joint is normal - but excessive movement at a joint is potentially dangerous/can cause injury
What are the 2 Joint positions?
- Close packed position
- Loose packed position
Close packed position
-the ligaments and joint capsule are tight
-the joint has maximal articular surface contact
-increase in stability- decrease in mobility
Loose packed position
-the ligaments and joint capsule are loose
-the joint has maximal space and available movement
-increase in mobility - decrease in stability
Muscles move various parts of the body by?
- Making the part move
- Allowing it to move
Tendons connect___________ to ____________.
Muscles to bone
Musculetendinous junction (MTJ)
Refers to to the connection between muscle and tendon
Tenoperiosteal Junction
Connection between a tendon and a bone
Muscle Belly
Central portion of the muscle (the meat of it)
Head
1/2 extension of a muscle belly attaches via it’s own tendon