Lecture 10 Flashcards
What is the structure of a synovial joint? (6)
- (Bone ends)
- Articular cartilage
- Capsule
- Cavity
- Synovial membrane
- Ligaments
What is a bursa?
A fluid filled cavity at a joint.
The structure of a synovial joint is designed for __________.
The structure of a synovial joint is designed for MOVEMENT.
In joints, there is always a trade of between _______ and _______.
In joints, there is always a trade of between STABILITY and MOBILITY.
Synovial joints have high ________ and low ______.
Synovial joints have high MOBILITY and low STABILITY.
What the words for ‘one axis’, ‘two axes’, and ‘many axes’?
Uniaxial, biaxial and multiaxial.
What 3 things determine the ROM at a joint?
- bone end shape
- ligament location and length
- body surface contact
What are 7 different synovial joint shapes?
- hinge
- pivot
- saddle
- ellipsoid
- condylar
- plane
- ball and socket
What is an example of a hinge joint?
ankle, elbow (humerus with ulna)
interphalangeal joints
What kind of motion do hinge joints allow?
Uniaxial (flexion/extension).
What is an example of a pivot joint?
radioulnar joints (supination/pronation)
What kind of motion do hinge joints allow?
Uniaxial (rotation - supination, pronation)
What is an example of a saddle joint?
Carpometacarpal joint - base of thumb
What kind of motion do saddle joints allow?
Biaxial
- flexion - extension
- abduction - adduction
- (also circumduction)
- OBLIGATORY rotation - opposition
What kind of motion do ellipsoid joints allow?
Biaxial
- flexion - extension
- abduction - adduction
- (also circumduction)
- NO ROTATION
