Flashcards in Arthrology Deck (33):
Congruency Functional Continuum
Mobility loose binding tissues
Poor Bony Congruency
Stability - Tight binding tissues
Good boney congruency
No or uni-planar movement
Very mobile, Poor boney congruency, multiplanar movement most commonly synovial joints.
Ex. The glenohumeral joint
Tight binding tissues, good bony congruency, very little movement.
Ex. pubic symphysis
Tight binding tissue, good boney congruecy, no movement.
Ex. Skull sutures.
Categories of Joints Based on Binding Tissue
Types of Fibrous Joints
All of the fibrous joints are made of Dense fibrous connective tissue.
Types of Cartilaginous Joints
Joints of the skull, like a jidsaw puzzles.
Allows no movement.
Made of dense fibrous connective tissue.
Made out of dense Fibrous connective tissue.
Found in interosseous membranes in the radius and ulna and the tibia and fibula.
Made out of dense fibrous connective tissue.
Found only in the teeth.
Made out of hyalin cartilage.
Found in epiphyseal growth plates and in the joint joining the sternum and the first rib.
Other ribs form synovial capsules.
Made out of Fibrocartilage.
Has a fibrous joint capsule (Binding Tissue).
It is made out of dense Irregular connective tissue.
There is cartilage within these fibrous joint capsules, depend on the joint but mostly all have hyalin
A membrane within the Fibrous joint capsule that produces synovial fluid.
Synovial Fluid Functions
Reduces friction associated with movement. Lubricates the joint.
Nourishes articular cartilage.
Fibrocartilage pads Functions
These pads arent in every joint.
Increase bony fit/congruency
Reduces compressional stress.
Intrinsic: completely within the joint
Extrinsic: Completely Outside of the joint
Capsular: continuous with the joint capsule, thickening of the joint capsule.
Types of synovial Joints
Call and Socket
Surfaces are flat and allowing glide.
Allows only translation.
Cylindrical end conforms to trough-shaped end allowing motion flexion/extension.
Rounded end conforms to a sleeve or ring of bone or ligaments allowing only rotation.
Radio ulnar joint proximal.
Oval surface of one bone fits to complementary depression of another bone allowing all angular motions.
Radio carpal joint
Resemble condyloid joint but bone ends have both concave and convex surfaces that fit together to allow more movement.
CMC of thumb.
Ball and Socket
Sperical/hemispherical head articulate with a cuplike socket allowing multi-axial movements.
Movement between bone relative to sagittal, frontal, and tranverse planes (joint rotations)
Axis of Rotations
Movement at the articular surfaces between bones.
Roll, Glide and Spin
Frontal Plane Axis
Sagittal Plane Axis
Transverse Plane Axis
Multiple point along one rotation ariticular surface contacting multiple points on another articular surface.
A single point on one articular surface contacting multiple points on another articular surface.