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27 terms

MST1350 #6 Types of Diarthrodial/Synovial (freely movable) Joints

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ALL 6 movable joints fall under the classification of Functional/Action - but what is the name of this type of freely movable joint?
Diarthrodial - a/k/a Synovial
Explain what a Diarthrodial joint is -
Diathrodial joints are synovial joints, freely moving with a joint cavity between the articulation
There are 6 types of Diarthrodial joints - name them
1) Ball & socket
2) Ellipsoid/Condyloid
3) Hinge
4) Saddle
5) Gliding/Plane
6) Pivot
What does a ball and socket joint look like, and how does it move?
It has a ball-shaped head that articulates with a dish-shaped depresson allowing movement in every plane.
A joint that allows movement in every plane is called
multiaxial
Give an example of a ball & socket joint
hip or shoulder
Give an example of a multiaxial joint
Hip or shoulder - allows movement in every plane -
What does an Ellipsoid/Condyloid joint look like, and how does it move?
Oval shaped end of one bone articulates with an elliptical basin.
It is a biaxial joint which allow movement in 2 directions.
1) flexion/extension 2) adduction/abduction
Give an example of a biaxial joint
wrist, trapezium, 1st metacarpal bones
Give an example of an Ellipsoid/Condyloid joint
wrist joint
What does a hinge joint look like?
A hinge joint can only flex and extend - one direction of movement. One direction of movement is called Uniaxial.
A joint that can only move in one direction is called
Uniaxial
An example of a hinge joint is
elbow
An example of a uniaxial joint is
elbow
Describe what a "saddle joint" looks like.
A saddle joint is a concave (inward curved bone) and a convex (outward curved bone) articulate. It is a biaxial joint - it allows movement in 2 directions.
A joint that can move in only 2 directions is called?
Biaxial joint
An example of a biaxial joint is
trapezium bone and the first metacarpal bone
What does a Gliding/Plane joint look like?
Gliding/Plane joints look like 2 bones that have flat (or almost flat) surfaces so at the point where they articulate - the movement would be gliding. This is a non-axial joint and the movement is very minimal.
What movements does a Gliding/Plane joint make?
Gliding/plane joints make minimal movements. It is a non-axial joint.
What type of joint is a Gliding/Plane joint?
non-axial joint - minimal movement
What is an example of a Gliding/Plane joint?
spine, carpals and tarsals
What type of joint is a ball and socket joint?
multiaxial - allows movement in a number of axises
What type of joint is an ellipsoid/condyloid joint?
Biaxial - allows movement in 2 axises
What type of joint is a hinge joint?
uniaxial - allows movement around 1 axis only
What type of joint is a saddle joint?
biaxial - allows movement in 2 axises
What type of joint is a pivot joint?
uniaxial - allows movement around 1 axis
Describe what a pivot joint looks like
A pivot joint is where one bone rotates around another. Pivot joints are uniaxial - they move in 1 direction